Gabriella Tranell on fri 6 jun 97
Hi Potters!
I was wondering if anyone out there has got a nice reliable recipe for
a black-grey satin finish cone 10 oxidising glaze?
Grateful, Gabriella
Debby Grant on sun 8 jun 97
Dear Gabriella,
Here is a very reliable ^10 oxidation or reduction glossy black glaze
which also produces a greenish cast at ^9.
Cornwall stone----------55
Ball clay----------------- 20
Dolomite-----------------15
Whiting------------------- 5
Iron oxide----------------- 4
Cobalt----------------------3
Flint-----------------------10
The 10% flint prevents crazing on my clay body. You might want to
reduce it to 5%. Try it, you'll like it.
Good luck, Debby Grant in NH
Ron Wright on fri 14 nov 97
I've finally decided to make my own glazes. I've just carried about 200
lbs. of mysterious and deadly compounds, elements, and oxides into my
basement. I've got scales, buckets, screens, mixers, books, charts, and
,according to Jeff Lawrence's post, an old copy of Visicalc (original
8'' floppy, CP/M, ran on a Kaypro) and a slide rule.
After a little puttering around I've found a couple of clear ^6 glazes
that work for me. My question is what can I add to get a black glaze at
cone 6 ox. None of the glaze books, that I have acquired at great
expense, are very specific about a black glaze.
I have to add a note of thanks to the people at the Olymipic kiln co.
After a distributor gave me a hard time by trying to sell me another
brand (I already have one Olympic, but wanted a bigger one), I called
the factory and they had it in my garage in five days. These guys know
how to keep a customer happy.
I can now heat my entire house just by leaving lid open when I'm not
firing. Although the lights in the other houses on the block dim a
little when I turn it on.
TIA
Ron Wright
Mixing police work and pottery, in Chicago where it's snowing by the
lake and raining by my house.
Tony Hansen on mon 17 nov 97
>After a little puttering around I've found a couple of clear ^6 glazes
>that work for me. My question is what can I add to get a black glaze at
>cone 6 ox. None of the glaze books, that I have acquired at great
>expense, are very specific about a black glaze.
I've had good luck with mason black stain.
6600 tends toward dark blue-black, 6666 is cobalt free and works well.
If a glaze has high iron (i.e. an Albany or Alberta slip base)
it will only take about 5% stain to make it black.
Black glazes are not cheap to make and I'd be cautious about food
surfaces, use a clear or white liner glaze instead.
--
-------
T o n y H a n s e n thansen@digitalfire.com
Get INSIGHT, Magic of Fire at http://digitalfire.com
Mike Vatalaro on mon 17 nov 97
You wrote>----------------------------Original
message----------------------------
>I've finally decided to make my own glazes. I've just carried about 200
>lbs. of mysterious and deadly compounds, elements, and oxides into my
>basement. I've got scales, buckets, screens, mixers, books, charts, and
>,according to Jeff Lawrence's post, an old copy of Visicalc (original
>8'' floppy, CP/M, ran on a Kaypro) and a slide rule.
>
>After a little puttering around I've found a couple of clear ^6 glazes
>that work for me. My question is what can I add to get a black glaze at
>cone 6 ox. None of the glaze books, that I have acquired at great
>expense, are very specific about a black glaze.
>
>I have to add a note of thanks to the people at the Olymipic kiln co.
>After a distributor gave me a hard time by trying to sell me another
>brand (I already have one Olympic, but wanted a bigger one), I called
>the factory and they had it in my garage in five days. These guys know
>how to keep a customer happy.
>I can now heat my entire house just by leaving lid open when I'm not
>firing. Although the lights in the other houses on the block dim a
>little when I turn it on.
>
>TIA
>Ron Wright
>Mixing police work and pottery, in Chicago where it's snowing by the
>lake and raining by my house.
Ron , To get a decent Black you could just add 6 to 8 % Masons Black
Stain , But I like to get it richer with a few oxides that are offten
listed as a way of achieving Black. Heres a glaze I developed that I use
on Sculptural Works mostly.
MV Black Satin Mat cone 4-6
Neph Syn ------45
Whiting---------20
Flint-----------5
EPK------------5
Fritt 3110-----5
Barium Carb -- 8 or( Sub 6% Strontium Carb)
Bentonite-----2
Black Mason Stain 7
Cobalt Carb-------1
Mang. Diox-------2
Copper Carb------1
This is a smooth matt that breaks a little over texture yet stays coal
Black. Lot's of oxides in this take all safty precautions during mix and
spraying. Good Luck
Mike Vatalaro
Clemson U
Clemson ,SC
paul wilmoth on mon 17 nov 97
Dear Ron Wright,
5% black stain + 5% red iron oxide will give a very nice black, I also
add 1% cobalt oxide for more depth( my black stain is cobalt free
however). Ceramic Glazes by Parmelee has a good formula for oxide
combinations for black which is :
cobalt oxide 31
chrome ox. 7
iron ox 36
manganese ox 12
nickel oxide 13
Make this mixture and make it 8 - 12 % of a glaze and you shoud get
black.
good luck -- Paul Wilmoth
Helllll on wed 19 nov 97
>I've had good luck with mason black stain.
>6600 tends toward dark blue-black, 6666 is cobalt free and works well.
>If a glaze has high iron (i.e. an Albany or Alberta slip base)
>it will only take about 5% stain to make it black.
>Black glazes are not cheap to make and I'd be cautious about food
>surfaces, use a clear or white liner glaze instead.
so i am wondering why you would question the use of your suggestion for food
surfaces... is it the stain or something in the stain ... is this a problem
with all stains????????????
creating, exploring, making, experiencing
Hank in OKC Oklahellma
Helllll@aol.com
Tony Hansen on fri 21 nov 97
> so i am wondering why you would question the use..
> for food surfaces
>is it the stain or something in the stain
Any glaze with lots of metallic oxides is a possible leacher
if the metals are saturated (in a high percentage)
or the base glaze is not
balanced enough to produce an insoluble glass.
--
-------
T o n y H a n s e n thansen@digitalfire.com
Get INSIGHT, Magic of Fire at http://digitalfire.com
Jennifer Rhinesmith on tue 25 nov 97
Ron: I'm sure you have gotten a lot of responses to this question, but I
will try to answer it again for you. A black is the resutl of adding all
the colorants together. I have a wonderful Black ^6 glaze that I will
foward to you, but I do not have it in front of me. It calls for Cobalt
Oxide, Manganese Diox., and Copper Carb. Like I said I will foward the
recipe to you tomorrow. Hope that helps, Jennifer in Alpine, Tx
Jennifer Rhinesmith
Vida Nueva Art Center & Coffeehouse
Alpine, Tx
On Fri, 14 Nov 1997, Ron Wright wrote:
> ----------------------------Original message----------------------------
> I've finally decided to make my own glazes. I've just carried about 200
> lbs. of mysterious and deadly compounds, elements, and oxides into my
> basement. I've got scales, buckets, screens, mixers, books, charts, and
> ,according to Jeff Lawrence's post, an old copy of Visicalc (original
> 8'' floppy, CP/M, ran on a Kaypro) and a slide rule.
>
> After a little puttering around I've found a couple of clear ^6 glazes
> that work for me. My question is what can I add to get a black glaze at
> cone 6 ox. None of the glaze books, that I have acquired at great
> expense, are very specific about a black glaze.
>
> I have to add a note of thanks to the people at the Olymipic kiln co.
> After a distributor gave me a hard time by trying to sell me another
> brand (I already have one Olympic, but wanted a bigger one), I called
> the factory and they had it in my garage in five days. These guys know
> how to keep a customer happy.
> I can now heat my entire house just by leaving lid open when I'm not
> firing. Although the lights in the other houses on the block dim a
> little when I turn it on.
>
> TIA
> Ron Wright
> Mixing police work and pottery, in Chicago where it's snowing by the
> lake and raining by my house.
>
arlene h. on wed 15 mar 00
Our club is in need of a recipe for a shiny black foodsafe glaze. We fire
at ^6 oxidation. Thank you!
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
Monique Duclos on thu 16 mar 00
hi,
Here is a very nice black glaze ,shiny, foodsafe I'm not sure , maybe
someone else could comment on this!!
Black glaze cone 6 oxidation
Feldspar custer 26
Ball Clay 20
Whiting 20
Silica 34
RIO 10
I use it on black cat I do for halloween and I never had any problem with
it.Good luck,and keep me inform :-)
@micalement,
Monique
Monique Duclos
mduclos@hotmail.com
3757 Boul des Fondateurs
St-Isidore Nouveau-Brunswick
Canada E8M 1B5
URL: http://www.angelfire.com/mo/pmdv
Subject: black glaze
Date: Wed, 15 Mar 2000 14:44:32 EST
----------------------------Original message----------------------------
Our club is in need of a recipe for a shiny black foodsafe glaze. We fire
at ^6 oxidation. Thank you!
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
John Hesselberth on thu 16 mar 00
arlene h. wrote:
>----------------------------Original message----------------------------
>Our club is in need of a recipe for a shiny black foodsafe glaze. We fire
>at ^6 oxidation. Thank you!
>______________________________________________________
>Get Your Private, Free Email at http://www.hotmail.com
Hi Arlene,
Ron Roy Black #3 (Custer) is the one I use with excellent results. It is
as stable to acid leaching as any glaze I've ever seen. I use it with 2%
cobalt carbonate as shown below to get what I call a true black; however
some people have been satisfied with it at 1%.
Ron Roy Black #3 (Custer) -- Cone 6 Oxidation
Custer Feldspar 22
Whiting 4
Talc 5
Frit 3134 26
EPK 17
Flint 26
Add
Bentonite 2
Red Iron Oxide 9
Cobalt Carbonate 2
John Hesselberth
Frog Pond Pottery
P.O. Box 88
Pocopson, PA 19366 USA
EMail: john@frogpondpottery.com web site: http://www.frogpondpottery.com
The only things in life that are certain are death and taxes; however
only taxes come once a year. Anonymous
Craig Martell on fri 17 mar 00
Monique sez that:
>Here is a very nice black glaze ,shiny, foodsafe I'm not sure , maybe
>someone else could comment on this!!
>Black glaze cone 6 oxidation
Hi:
This is a good glaze for domestic pots and there is nothing in it that
would be toxic. Plus the alumina and silica are high enough to make this a
cone 10 glaze. Well above the limits for a cone 6 glaze in respect to
alumina and silica. It's very high in Ca and a bit low in KNaO but if it
melts at cone 6 I wouldn't be the least bit concerned. The receipe and
formula are posted below.
custer feldspar..... 26.00 23.64%
whiting............. 20.00 18.18%
om #4 ball clay..... 20.00 18.18%
silica.............. 34.00 30.91%
iron oxide red...... 10.00 9.09%
========
110.00
CaO 0.82* 11.53%
MgO 0.01* 0.08%
K2O 0.12* 2.92%
Na2O 0.05* 0.83%
TiO2 0.01 0.24%
Al2O3 0.40 10.25%
SiO2 4.22 63.95%
Fe2O3 0.25 10.21%
Cost/kg 0.29
Si:Al 10.59
SiB:Al 10.59
Expan 7.19
regards, Craig Martell in Oregon
Wagtime on tue 20 feb 01
Is there such a thing as a commercial black glaze that will fire to cone 6 +
without getting a green tinge? This seems to happen to underglazes too.
I'm working with porcelain, with the aim of having a glossy black and white
piece. If I fire the piece with a white glaze to cone 6, is there anyway I
can get the low-fire black glaze to adhere to the surface to refire at a
lower temperature? I've tried China paints with no success.
The white doesn't necessarily have to be glossy,(although I would prefer it)
so I was wondering if a dryish matt white when fired, would hold the low
fire black.
Any help would be very much appreciated. TIA Rita
Jim Bob Salazar on thu 18 oct 01
hey folks,
my students are asking for a black glaze and i don't have one. does anyone have a
good (^ 9-10 reduction) black they will share? pleeeeeese.
thanks mucho,
jim bob
David Beumee on thu 18 oct 01
This is my black glaze for cone 10 to 12, and most probably will work at
cone 9 as well ( reduction )
50 Alberta slip
26 nepheline syenite
5 cobalt carb.
6 silica
5 whiting
3 EPK
4 custer spar
1 iron chromate
add: 1% Macaloid
Be sure to mix and strain throughly. This black glaze has just a hint of
shininess to it , and works beautifully with the following overglaze, mixed
thick enough to trail.
37.5 neph sy
16.7 whiting
45.8 silica
add: 1% Macaloid
1% Chrome ox.
1.5% cobalt carb
Glad to help.
David Beumee
Earth Alchemy Pottery
----- Original Message -----
From: "Jim Bob Salazar"
To:
Sent: Thursday, October 18, 2001 12:57 PM
Subject: black glaze
> hey folks,
>
> my students are asking for a black glaze and i don't have one. does
anyone have a
> good (^ 9-10 reduction) black they will share? pleeeeeese.
>
> thanks mucho,
>
> jim bob
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
chris clarke on fri 19 oct 01
I have an Iron Saturation that is black and red brown (mostly black) and is
totally black if you spray manganese dioxide over it (I know, I don't want
to hear it) it's fourth glaze down on this page ---
http://www.ccpots.com/html/forpotters.htm
It's ^9 to ^10 but the manganese seems to not be as black at ^10.
temecula, california
chris@ccpots.com
www.ccpots.com
John Hesselberth on sun 21 oct 01
on 10/18/01 2:57 PM, Jim Bob Salazar at jsalazar@SULROSS.EDU wrote:
> hey folks,
>
> my students are asking for a black glaze and i don't have one. does anyone
> have a
> good (^ 9-10 reduction) black they will share? pleeeeeese.
>
> thanks mucho,
>
> jim bob
Hi jim bob,
Check out Waxy Black and Worner Black on my web site. From my home page
click on Glaze Stability and then scroll to the bottom of that page. They
have both been leach tested and are quite stable.
Regards,
John
Web site: http://www.frogpondpottery.com Email: john@frogpondpottery.com
"The life so short, the craft so long to learn." Chaucer's translation of
Hippocrates, 5th cent. B.C.
Rita Tolley on tue 23 oct 01
Hi,
I've just come up with this very glossy black glaze fired to cone 10
reduction after testing various combinations of colourant oxides in a clear
cone 5 glaze.
Potash Feldspar 35
Whiting 12
Kaolin 10
Silica 19
Frit 4124 24
Cobalt oxide 3
Red Iron Oxide 7
I also got a very dark blue with this glaze with 1 part Chromium oxide
instead of the Iron.
Hope the ingredients are translatable
Regards Reet
Canberra Australia
----- Original Message -----
From: "Jim Bob Salazar"
Sent: Friday, October 19, 2001 4:57 AM
Subject: black glaze
> hey folks,
>
> my students are asking for a black glaze and i don't have one. does
anyone have a
> good (^ 9-10 reduction) black they will share? pleeeeeese.
>
> thanks mucho,
>
> jim bob
>
Bill Merrill on mon 13 feb 12
Here is a cone 9-10 reduction black. I use it on stoneware over
textural surfaces. I brush it on thick, let the glaze dry and using a
nylon pad, remove all the surface glaze, I save all the dry glaze that
has been removed and use it again. I use a slightly dampened sponge and
go over the surface removing excess glaze left on the surface of the
pot. I don't use this glaze to glaze regular pots. I call it "Black
Crack" as I use it primarily to fill depressions left on textured
pieces.
Bill's "Black Crack"
100 Custer Spar
20 Dolomite
10 Talc
20 Barium
30 Flint
20 EPK
12 Manganese
8 Cobalt Oxide.
Ben Morrison on sun 19 feb 12
While in college I once poisoned myself=3D
Manganese is serious business.=3D0A=3D0AWhile in college I once poisoned my=
self=3D
by accidentally coating my hands with fine manganese while mixing glaze. N=
=3D
ot knowing the toxicity and osmotic behavior of manganese I decided to fini=
=3D
sh mixing a few more glazes before washing up. About an hour later I went t=
=3D
o wash my hand to find that I had very little manganese left on my hands. I=
=3D
t had soaked through my skin and absorbed into my blood stream. I had a lot=
=3D
of stomach pain for the next several months, which I attributed to the fil=
=3D
tration of the heavy metal=3DA0alkali=3DA0through my organs. I did stop dri=
nkin=3D
g alcohol for a couple years afterwards to avoid further damage to my organ=
=3D
s. I still wonder how much I might have shortened my life.=3D0A=3D0A-Ben=3D=
0A=3D0A_=3D
_______________________________=3D0A From: "ronroy@CA.INTER.NET" .I=3D
NTER.NET>=3D0ATo: Clayart@LSV.CERAMICS.ORG =3D0ASent: Sunday, February 19, =
2012=3D
3:17 PM=3D0ASubject: Re: Black Glaze=3D0A =3D0ABut - before you start crea=
ting a=3D
ll that dust - have a look at the=3D0Atoxicity of manganese - RR=3D0A=3D0A=
=3D0AQuot=3D
ing Bill Merrill :=3D0A=3D0A> Here is a cone 9-10 redu=
ctio=3D
n black.=3DA0 I use it on stoneware over=3D0A> textural surfaces.=3DA0 I br=
ush it=3D
on thick, let the glaze dry=3DA0 and using a=3D0A> nylon pad, remove all t=
he s=3D
urface glaze,=3DA0 I save all the dry glaze that=3D0A> has been removed and=
use=3D
it again.=3DA0 I use a slightly dampened sponge and=3D0A> go over the surf=
ace =3D
removing excess glaze left on the surface of the=3D0A> pot.=3DA0 I don't us=
e th=3D
is glaze to glaze regular pots.=3DA0 I call it "Black=3D0A> Crack" as I use=
it =3D
primarily to fill depressions left on textured=3D0A> pieces.=3D0A>=3D0A> Bi=
ll's "=3D
Black Crack"=3D0A>=3D0A> 100=3DA0 Custer Spar=3D0A>=3D0A> 20=3DA0 Dolomite=
=3D0A>=3D0A> 10=3D
=3DA0 Talc=3D0A>=3D0A> 20=3DA0 Barium=3D0A>=3D0A> 30=3DA0 Flint=3D0A>=3D0A>=
20=3DA0 EPK=3D0A>=3D0A>=3D
12=3DA0 Manganese=3D0A>=3D0A> 8=3DA0 Cobalt Oxide.=3D0A>
ronroy@CA.INTER.NET on sun 19 feb 12
But - before you start creating all that dust - have a look at the
toxicity of manganese - RR
Quoting Bill Merrill :
> Here is a cone 9-10 reduction black. I use it on stoneware over
> textural surfaces. I brush it on thick, let the glaze dry and using a
> nylon pad, remove all the surface glaze, I save all the dry glaze that
> has been removed and use it again. I use a slightly dampened sponge and
> go over the surface removing excess glaze left on the surface of the
> pot. I don't use this glaze to glaze regular pots. I call it "Black
> Crack" as I use it primarily to fill depressions left on textured
> pieces.
>
> Bill's "Black Crack"
>
> 100 Custer Spar
>
> 20 Dolomite
>
> 10 Talc
>
> 20 Barium
>
> 30 Flint
>
> 20 EPK
>
> 12 Manganese
>
> 8 Cobalt Oxide.
>
Vince Pitelka on mon 20 feb 12
Ben Morrison wrote:
"While in college I once poisoned myself by accidentally coating my =3D
hands
with fine manganese while mixing glaze. Not knowing the toxicity and =3D
osmotic
behavior of manganese I decided to finish mixing a few more glazes =3D
before
washing up. About an hour later I went to wash my hand to find that I =3D
had
very little manganese left on my hands. It had soaked through my skin =3D
and
absorbed into my blood stream. I had a lot of stomach pain for the next
several months, which I attributed to the filtration of the heavy
metal=3DA0alkali=3DA0through my organs. I did stop drinking alcohol for a =
=3D
couple
years afterwards to avoid further damage to my organs. I still wonder =3D
how
much I might have shortened my life."
Ben -=3D20
What form of manganese wee you using? In studio ceramics we generally =3D
use
manganese in the dioxide form. I am curious about what you refer to as
"osmotic behavior." It is my understanding that manganese dioxide =3D
powder is
insoluble in water and cannot be absorbed through healthy skin, and that =
=3D
the
primary dangers are breathing the dust or the firing fumes. I want to =3D
know
if there really is a proven danger of absorption through the skin. =3D
Maybe
our resident toxicologist Edouard can clarify this.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net
http://iweb.tntech.edu/wpitelka/
Vince Pitelka on tue 21 feb 12
Sandy Miller wrote:
"Now I am confused.....So is manganese dioxide, the stuff we order from our
clay suppliers like Bailey, Tucker, Laguna, Standard etc. absorbed through
the skin? If only we could consult with David Shaner......"
Hi Sandy -
Well, if only David Shaner were still around for so many reasons, but I
don't think he could tell you much about this. As I understand the
situation with Shaner, it was the firing fumes that so negatively affected
his health, not absorption through the skin. Edouard emailed me off-list
and confirmed that manganese dioxide cannot be absorbed through the skin.
The danger is from breathing the dust or the firing fumes.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net
http://iweb.tntech.edu/wpitelka/
Edouard Bastarache on tue 21 feb 12
Vince & all,
inorganic manganese does not skin-penetrate.
Manganese carbonyl is considered an inorganic compound.
http://fscimage.fishersci.com/msds/91174.htm
Plejkore,
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://www.flickr.com/photos/30058682@N00/
http://edouardbastarache.blogspot.com/
http://smart2000.pagesperso-orange.fr/bloggs_edouard.htm
http://www.facebook.com/edouard.bastarache
----- Original Message -----
From: "Vince Pitelka"
To:
Sent: Monday, February 20, 2012 7:27 PM
Subject: Re: Black Glaze
Ben Morrison wrote:
"While in college I once poisoned myself by accidentally coating my hands
with fine manganese while mixing glaze. Not knowing the toxicity and osmoti=
c
behavior of manganese I decided to finish mixing a few more glazes before
washing up. About an hour later I went to wash my hand to find that I had
very little manganese left on my hands. It had soaked through my skin and
absorbed into my blood stream. I had a lot of stomach pain for the next
several months, which I attributed to the filtration of the heavy
metal alkali through my organs. I did stop drinking alcohol for a couple
years afterwards to avoid further damage to my organs. I still wonder how
much I might have shortened my life."
Ben -
What form of manganese wee you using? In studio ceramics we generally use
manganese in the dioxide form. I am curious about what you refer to as
"osmotic behavior." It is my understanding that manganese dioxide powder i=
s
insoluble in water and cannot be absorbed through healthy skin, and that th=
e
primary dangers are breathing the dust or the firing fumes. I want to know
if there really is a proven danger of absorption through the skin. Maybe
our resident toxicologist Edouard can clarify this.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net
http://iweb.tntech.edu/wpitelka/
madpotter55 on tue 21 feb 12
Now I am confused.....
So is manganese dioxide, the stuff we order from our clay suppliers like Ba=
i=3D
ley, Tucker, Laguna, Standard etc. absorbed through the skin? If only we c=
o=3D
uld consult with David Shaner......
Sandy Miller
www.sandymillerpottery.com
On Feb 21, 2012, at 10:20 AM, Edouard Bastarache wrote=
:=3D
> Vince & all,
>=3D20
> inorganic manganese does not skin-penetrate.
> Manganese carbonyl is considered an inorganic compound.
>=3D20
>=3D20
> http://fscimage.fishersci.com/msds/91174.htm
>=3D20
> Plejkore,
>=3D20
> Edouard Bastarache
> Spertesperantisto
>=3D20
> Sorel-Tracy
> Quebec
>=3D20
> http://www.flickr.com/photos/30058682@N00/
> http://edouardbastarache.blogspot.com/
> http://smart2000.pagesperso-orange.fr/bloggs_edouard.htm
> http://www.facebook.com/edouard.bastarache
>=3D20
>=3D20
>=3D20
>=3D20
>=3D20
>=3D20
> ----- Original Message -----
> From: "Vince Pitelka"
> To:
> Sent: Monday, February 20, 2012 7:27 PM
> Subject: Re: Black Glaze
>=3D20
>=3D20
> Ben Morrison wrote:
> "While in college I once poisoned myself by accidentally coating my hands
> with fine manganese while mixing glaze. Not knowing the toxicity and osmo=
t=3D
ic
> behavior of manganese I decided to finish mixing a few more glazes before
> washing up. About an hour later I went to wash my hand to find that I had
> very little manganese left on my hands. It had soaked through my skin and
> absorbed into my blood stream. I had a lot of stomach pain for the next
> several months, which I attributed to the filtration of the heavy
> metal alkali through my organs. I did stop drinking alcohol for a couple
> years afterwards to avoid further damage to my organs. I still wonder how
> much I might have shortened my life."
>=3D20
> Ben -
> What form of manganese wee you using? In studio ceramics we generally us=
e=3D
> manganese in the dioxide form. I am curious about what you refer to as
> "osmotic behavior." It is my understanding that manganese dioxide powder=
i=3D
s
> insoluble in water and cannot be absorbed through healthy skin, and that =
t=3D
he
> primary dangers are breathing the dust or the firing fumes. I want to kn=
o=3D
w
> if there really is a proven danger of absorption through the skin. Maybe
> our resident toxicologist Edouard can clarify this.
> - Vince
>=3D20
> Vince Pitelka
> Appalachian Center for Craft
> Tennessee Tech University
> vpitelka@dtccom.net
> http://iweb.tntech.edu/wpitelka/
Steve Slatin on tue 21 feb 12
Edouard --=3D0A=3DA0=3D0ARight, but with a very large exception --=3D0A=3DA=
0=3D0AAs the=3D
MSDS you lined to points out,=3DA0the carbonyl=3DA0is "considered" not to =
be o=3D
rganic =3D0A"because it decomposes to carbon monoxide and manganese."=3D0A=
=3D0ATh=3D
at same MSDS also advises --=3D0A=3DA0=3D0A"Warning! Harmful if swallowed, =
inhale=3D
d, or absorbed through the skin."=3D0A=3DA0=3D0AIIRC, Manganese dioxide IS =
solubl=3D
e in water, although only slightly --=3D0Aand the sulfate and chloride are =
hi=3D
ghly soluble in water.=3DA0=3DA0 Some transdermal=3D0Aacquisition of mangan=
ese is=3D
very highly likely.=3DA0Whatever the=3D0Asource may be, manganese is solub=
le e=3D
nough to be a problem in some=3D0Awater systems, where if you have a 'slow'=
z=3D
one you can get microbial=3D0A'sludge' of wee beasties that live off of the=
m=3D
anganese dissolved in the=3D0Awater.=3DA0 (You will get very slow water mov=
emen=3D
t, and black spots on=3D0Ayour laundry.)=3D0A=3DA0=3D0AHere's what the MSDS=
for Mag=3D
nesium dioxide (the black stuff that=3D0Awe usually get to use in clays and=
g=3D
lazes) says about the stuff ...=3D0A=3DA0=3D0A"Chronic Potential Health Eff=
ects:=3D
=3D0A=3D0APeople and health being what they are, I'm sure you can find some=
one=3D
=3D0Awho sleeps in a bathtub full of the stuff every night and claims to be=
=3D
=3D0Afine.=3DA0 I wouldn't=3DA0chance it, though.=3D0A=3D0ACowardly yours -=
-=3D0ASteve =3D
Slatin =3D0A=3D0A=3D0AN48.0886450=3D0AW123.1420482=3D0A=3D0A=3D0A__________=
______________=3D
________=3D0A=3D0AVince & all,=3D0A=3D0Ainorganic manganese does not skin-p=
enetrate=3D
.=3D0AManganese carbonyl is considered an inorganic compound.=3D0A=3D0A=3D0=
Ahttp://=3D
fscimage.fishersci.com/msds/91174.htm=3D0A=3D0APlejkore,=3D0A=3D0AEdouard B=
astarach=3D
e=3D0ASpertesperantisto=3D0A=3D0ASorel-Tracy=3D0AQuebec=3D0A=3D0Ahttp://www=
.flickr.com/=3D
photos/30058682@N00/=3D0Ahttp://edouardbastarache.blogspot.com/=3D0Ahttp://=
smar=3D
t2000.pagesperso-orange.fr/bloggs_edouard.htm=3D0Ahttp://www.facebook.com/e=
do=3D
uard.bastarache=3D0A=3D0A=3D0A=3D0A=3D0A=3D0A=3D0A----- Original Message --=
---=3D0AFrom: "V=3D
ince Pitelka" =3D0ATo: =3D0A=
Sent=3D
: Monday, February 20, 2012 7:27 PM=3D0ASubject: Re: Black Glaze=3D0A=3D0A=
=3D0ABen =3D
Morrison wrote:=3D0A"While in college I once poisoned myself by accidentall=
y =3D
coating my hands=3D0Awith fine manganese while mixing glaze. Not knowing th=
e =3D
toxicity and osmotic=3D0Abehavior of manganese I decided to finish mixing a=
f=3D
ew more glazes before=3D0Awashing up. About an hour later I went to wash my=
h=3D
and to find that I had=3D0Avery little manganese left on my hands. It had s=
oa=3D
ked through my skin and=3D0Aabsorbed into my blood stream. I had a lot of s=
to=3D
mach pain for the next=3D0Aseveral months, which I attributed to the filtra=
ti=3D
on of the heavy=3D0Ametal alkali through my organs. I did stop drinking alc=
oh=3D
ol for a couple=3D0Ayears afterwards to avoid further damage to my organs. =
I =3D
still wonder how=3D0Amuch I might have shortened my life."=3D0A=3D0ABen -=
=3D0AWhat =3D
form of manganese wee you using?=3DA0 In studio ceramics we generally use=
=3D0Am=3D
anganese in the dioxide form.=3DA0 I am curious about what you refer to as=
=3D0A=3D
"osmotic behavior."=3DA0 It is my understanding that manganese dioxide powd=
er=3D
is=3D0Ainsoluble in water and cannot be absorbed through healthy skin, and=
t=3D
hat the=3D0Aprimary dangers are breathing the dust or the firing fumes.=3DA=
0 I =3D
want to know=3D0Aif there really is a proven danger of absorption through t=
he=3D
skin.=3DA0 Maybe=3D0Aour resident toxicologist Edouard can clarify this.=
=3D0A- V=3D
ince=3D0A=3D0AVince Pitelka=3D0AAppalachian Center for Craft=3D0ATennessee =
Tech Uni=3D
versity=3D0Avpitelka@dtccom.net=3D0Ahttp://iweb.tntech.edu/wpitelka/=3D0A=
=3D0A=3D0A=3D
=3D0AChronic exposure to Manganese dioxide can lead to manganese poisoning,=
c=3D
alled Maganism. It primarily involves=3D0Athe central nervous system. Early=
s=3D
ymptoms include languor, sleepiness, poor appetite, and weakness in the=3D0=
Al=3D
egs. Later effects which may include a stolid mask-like appearance of the f=
=3D
ace, muscle cramps, twitiching and=3D0Atremors, changes in mood and persona=
li=3D
ty, emotional disturbances such as uncontrollable laughter and a spastic=3D=
0A=3D
gait with tendency to fall while walking as well as anemia are also finding=
=3D
s in workers exposed to the dust or=3D0Afumes of manganese compounds. Later=
s=3D
ymptoms are identical to Parkinson's disease. Repeated or prolonged=3D0Aexp=
os=3D
ure may also damage the liver and may cause a decrease in the heart rate.=
=3D
=3D0ARepeated inhalation of manganese dust may also cause Manganese Pneumon=
it=3D
is, bronchitis with cough, phlegm,=3D0Aand/or shortness breath."
Edouard Bastarache on tue 21 feb 12
The inorganic compounds do not penetrate the body via skin like some =3D
organic compounds such as certain tricarbonyls.=3D20
Inhalation of dust or fume is the major route of entry in occupational =3D
manganese poisonning. Also inhaled large particles are ingested after =3D
mucociliary clearance from the lungs. Gastrointestinal absorption is =3D
generally low (5%). Very few poisonings have occured after ingestion.(My =
=3D
book)
http://fscimage.fishersci.com/msds/91174.htm=3D20
the MSDS says :
"Synonyms: Manganese carbonyl; considered to be an inorganic compound =3D
because it decomposes to carbon monoxide and manganese. " (I Googled =3D
"Tricarbonyl of manganese")
If you are talking "Methylcyclopentadienyl manganese tricarbonyl"
dats different:=3D20
http://datasheets.scbt.com/sc-228587.pdf
We had hours of discussion here years ago on this situatiuon,,,
Plejkore,
Edouard Bastarache=3D20
Spertesperantisto=3D20
Sorel-Tracy
Quebec
http://www.flickr.com/photos/30058682@N00/
http://edouardbastarache.blogspot.com/
http://smart2000.pagesperso-orange.fr/bloggs_edouard.htm
http://www.facebook.com/edouard.bastarache
----- Original Message -----=3D20
From: Steve Slatin=3D20
To: Edouard Bastarache ; Clayart@LSV.CERAMICS.ORG=3D20
Sent: Tuesday, February 21, 2012 3:55 PM
Subject: Re: Black Glaze
Edouard --
Right, but with a very large exception --
As the MSDS you lined to points out, the carbonyl is "considered" not =3D
to be organic=3D20
"because it decomposes to carbon monoxide and manganese."
That same MSDS also advises --
"Warning! Harmful if swallowed, inhaled, or absorbed through the =3D
skin."
IIRC, Manganese dioxide IS soluble in water, although only slightly --
and the sulfate and chloride are highly soluble in water. Some =3D
transdermal
acquisition of manganese is very highly likely. Whatever the
source may be, manganese is soluble enough to be a problem in some
water systems, where if you have a 'slow' zone you can get microbial
'sludge' of wee beasties that live off of the manganese dissolved in =3D
the
water. (You will get very slow water movement, and black spots on
your laundry.)
Here's what the MSDS for Magnesium dioxide (the black stuff that
we usually get to use in clays and glazes) says about the stuff ...
"Chronic Potential Health Effects:
Chronic exposure to Manganese dioxide can lead to manganese poisoning, =
=3D
called Maganism. It primarily involves
the central nervous system. Early symptoms include languor, =3D
sleepiness, poor appetite, and weakness in the
legs. Later effects which may include a stolid mask-like appearance of =
=3D
the face, muscle cramps, twitiching and
tremors, changes in mood and personality, emotional disturbances such =3D
as uncontrollable laughter and a spastic
gait with tendency to fall while walking as well as anemia are also =3D
findings in workers exposed to the dust or
fumes of manganese compounds. Later symptoms are identical to =3D
Parkinson's disease. Repeated or prolonged
exposure may also damage the liver and may cause a decrease in the =3D
heart rate.
Repeated inhalation of manganese dust may also cause Manganese =3D
Pneumonitis, bronchitis with cough, phlegm,
and/or shortness breath."
People and health being what they are, I'm sure you can find someone
who sleeps in a bathtub full of the stuff every night and claims to be
fine. I wouldn't chance it, though.
Cowardly yours --
Steve Slatin=3D20
N48.0886450
W123.1420482
Vince & all,
inorganic manganese does not skin-penetrate.
Manganese carbonyl is considered an inorganic compound.
http://fscimage.fishersci.com/msds/91174.htm
Plejkore,
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://www.flickr.com/photos/30058682@N00/
http://edouardbastarache.blogspot.com/
http://smart2000.pagesperso-orange.fr/bloggs_edouard.htm
http://www.facebook.com/edouard.bastarache
----- Original Message -----
From: "Vince Pitelka"
To:
Sent: Monday, February 20, 2012 7:27 PM
Subject: Re: Black Glaze
Ben Morrison wrote:
"While in college I once poisoned myself by accidentally coating my =3D
hands
with fine manganese while mixing glaze. Not knowing the toxicity and =3D
osmotic
behavior of manganese I decided to finish mixing a few more glazes =3D
before
washing up. About an hour later I went to wash my hand to find that I =3D
had
very little manganese left on my hands. It had soaked through my skin =3D
and
absorbed into my blood stream. I had a lot of stomach pain for the =3D
next
several months, which I attributed to the filtration of the heavy
metal alkali through my organs. I did stop drinking alcohol for a =3D
couple
years afterwards to avoid further damage to my organs. I still wonder =3D
how
much I might have shortened my life."
Ben -
What form of manganese wee you using? In studio ceramics we generally =
=3D
use
manganese in the dioxide form. I am curious about what you refer to =3D
as
"osmotic behavior." It is my understanding that manganese dioxide =3D
powder is
insoluble in water and cannot be absorbed through healthy skin, and =3D
that the
primary dangers are breathing the dust or the firing fumes. I want to =
=3D
know
if there really is a proven danger of absorption through the skin. =3D
Maybe
our resident toxicologist Edouard can clarify this.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net
http://iweb.tntech.edu/wpitelka/
Vince Pitelka on tue 21 feb 12
Edouard Bastarache wrote:
Inorganic manganese does not skin-penetrate. Manganese carbonyl is
considered an inorganic compound.
Hi Edouard -
Ben may have asked you about the above compound, but this doesn't do the
rest of us any good. What about manganese dioxide, the form that most
people use in studio ceramics? I had always understood that manganese
dioxide could not be absorbed through the skin.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net
http://iweb.tntech.edu/wpitelka/
Steve Mills on wed 22 feb 12
Steve you make a good point that tolerance of different substances vary wit=
h=3D
the individual, so it is a wise precaution when in doubt to cater for the =
w=3D
orst scenario.=3D20
As a friend put it: "We are all cast in the same mould, it's just that some=
o=3D
f us are mouldier than others".=3D20
Steve M
Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my iPod
On 21 Feb 2012, at 20:55, Steve Slatin wrote:
> People and health being what they are, I'm sure you can find someone
> who sleeps in a bathtub full of the stuff every night and claims to be
> fine. I wouldn't chance it, though.
>=3D20
> Cowardly yours --
> Steve Slatin=3D20
>=3D20
>=3D20
> N48.0886450
> W123.1420482
>=3D20
>=3D20
> ________________________________
>=3D20
> Vince & all,
>=3D20
> inorganic manganese does not skin-penetrate.
> Manganese carbonyl is considered an inorganic compound.
>=3D20
>=3D20
> http://fscimage.fishersci.com/msds/91174.htm
>=3D20
> Plejkore,
>=3D20
> Edouard Bastarache
> Spertesperantisto
>=3D20
> Sorel-Tracy
> Quebec
>=3D20
> http://www.flickr.com/photos/30058682@N00/
> http://edouardbastarache.blogspot.com/
> http://smart2000.pagesperso-orange.fr/bloggs_edouard.htm
> http://www.facebook.com/edouard.bastarache
>=3D20
>=3D20
>=3D20
>=3D20
>=3D20
>=3D20
> ----- Original Message -----
> From: "Vince Pitelka"
> To:
> Sent: Monday, February 20, 2012 7:27 PM
> Subject: Re: Black Glaze
>=3D20
>=3D20
> Ben Morrison wrote:
> "While in college I once poisoned myself by accidentally coating my hands
> with fine manganese while mixing glaze. Not knowing the toxicity and osmo=
t=3D
ic
> behavior of manganese I decided to finish mixing a few more glazes before
> washing up. About an hour later I went to wash my hand to find that I had
> very little manganese left on my hands. It had soaked through my skin and
> absorbed into my blood stream. I had a lot of stomach pain for the next
> several months, which I attributed to the filtration of the heavy
> metal alkali through my organs. I did stop drinking alcohol for a couple
> years afterwards to avoid further damage to my organs. I still wonder how
> much I might have shortened my life."
>=3D20
> Ben -
> What form of manganese wee you using? In studio ceramics we generally us=
e=3D
> manganese in the dioxide form. I am curious about what you refer to as
> "osmotic behavior." It is my understanding that manganese dioxide powder=
i=3D
s
> insoluble in water and cannot be absorbed through healthy skin, and that =
t=3D
he
> primary dangers are breathing the dust or the firing fumes. I want to kn=
o=3D
w
> if there really is a proven danger of absorption through the skin. Maybe
> our resident toxicologist Edouard can clarify this.
> - Vince
>=3D20
> Vince Pitelka
> Appalachian Center for Craft
> Tennessee Tech University
> vpitelka@dtccom.net
> http://iweb.tntech.edu/wpitelka/
>=3D20
>=3D20
>=3D20
> Chronic exposure to Manganese dioxide can lead to manganese poisoning, ca=
l=3D
led Maganism. It primarily involves
> the central nervous system. Early symptoms include languor, sleepiness, p=
o=3D
or appetite, and weakness in the
> legs. Later effects which may include a stolid mask-like appearance of th=
e=3D
face, muscle cramps, twitiching and
> tremors, changes in mood and personality, emotional disturbances such as =
u=3D
ncontrollable laughter and a spastic
> gait with tendency to fall while walking as well as anemia are also findi=
n=3D
gs in workers exposed to the dust or
> fumes of manganese compounds. Later symptoms are identical to Parkinson's=
d=3D
isease. Repeated or prolonged
> exposure may also damage the liver and may cause a decrease in the heart =
r=3D
ate.
> Repeated inhalation of manganese dust may also cause Manganese Pneumoniti=
s=3D
, bronchitis with cough, phlegm,
> and/or shortness breath."
marta matray on wed 22 feb 12
dear sandy, vince, and all
since i was always so inspired by the work of david shaner and hans coper,
i also wanted to try manganese, but soon after i learned about the tragic
death of both shaner and coper, i got scared to use manganese in any form.
i still love though that beautiful warm blackness on their pots.
my question is: what would be similar to the 'manganese look' after firing,
without the danger?
thanks, marta
http://www.mnartists.org/Marta_Matray
> Sandy Miller wrote:
> "Now I am confused.....So is manganese dioxide, the stuff we order from o=
=3D
ur
> clay suppliers like Bailey, Tucker, Laguna, Standard etc. absorbed throug=
=3D
h
> the skin? =3DA0If only we could consult with David Shaner......"
>
> Hi Sandy -
> Well, if only David Shaner were still around for so many reasons, but I
> don't think he could tell you much about this. =3DA0As I understand the
> situation with Shaner, it was the firing fumes that so negatively affecte=
=3D
d
> his health, not absorption through the skin. =3DA0Edouard emailed me off-=
li=3D
st
> and confirmed that manganese dioxide cannot be absorbed through the skin.
> The danger is from breathing the dust or the firing fumes.
> - Vince
jonathan byler on wed 22 feb 12
ummmm. manganese? just take basic safety precautions like having
proper ventilation in your kiln room, disposing of waste in an
appropriate manner consistent with common sense and epa rules, and use
good hygiene when mixing, applying, and handling glazes. it's not
like we're talking about handling plutonium here.
On Feb 22, 2012, at 8:29 AM, marta matray wrote:
> dear sandy, vince, and all
>
> since i was always so inspired by the work of david shaner and hans
> coper,
> i also wanted to try manganese, but soon after i learned about the
> tragic
> death of both shaner and coper, i got scared to use manganese in any
> form.
> i still love though that beautiful warm blackness on their pots.
> my question is: what would be similar to the 'manganese look' after
> firing,
> without the danger?
>
> thanks, marta
> http://www.mnartists.org/Marta_Matray
>
>
>> Sandy Miller wrote:
>> "Now I am confused.....So is manganese dioxide, the stuff we order
>> from our
>> clay suppliers like Bailey, Tucker, Laguna, Standard etc. absorbed
>> through
>> the skin? If only we could consult with David Shaner......"
>>
>> Hi Sandy -
>> Well, if only David Shaner were still around for so many reasons,
>> but I
>> don't think he could tell you much about this. As I understand the
>> situation with Shaner, it was the firing fumes that so negatively
>> affected
>> his health, not absorption through the skin. Edouard emailed me
>> off-list
>> and confirmed that manganese dioxide cannot be absorbed through the
>> skin.
>> The danger is from breathing the dust or the firing fumes.
>> - Vince
Vince Pitelka on wed 22 feb 12
Marta wrote;
"I still love though that beautiful warm blackness on their pots. My
question is: what would be similar to the 'manganese look' after firing,
without the danger?"
Hi Marta -
There really is nothing that will do the same thing, but the question is
sort of moot, since there is no danger at all if you use manganese
intelligently. Wear a proper twin-element face-fitting P-100 dust mask when
mixing, and ventilate your kiln very well.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net
http://iweb.tntech.edu/wpitelka/
Sandy miller on wed 22 feb 12
Dear Marta, Vince, Steve and Everyone who is reading this thread,
David Shaner certainly rocked my world. Like so many, put the manganese
dioxide on the shelf and left it there for years.
After many years I brought it back down, with caution. Today I use it, in
fact I spray it in a well ventilated spray booth and
I am in a haz - mat suit with cuffs taped....... very attractive Marta,
Ceramics Monthly centerfold!
I fire to ^6 in with a kiln, vented to the outside and only fire
the manganese glazed in one specific kiln. (I don't fire functional work
in that kiln, ever!) I am out of the studio when the kiln is firing and
usual 24 - 48 hours after depending on how long it takes to cool.
I also use barium and other glaze ingredients that have bad reputations but
they do have a place in my studio. Years ago when I started down this road
so many things were assumed to be safe once fired. I was surprised in the
80's when I found out barium could leach into food as did copper when it
was added to a glaze over 2%. I all but stopped making functional work.
Now I'm back to making a bit of functional work but testing and watching
the glaze chemistry.
All that said when I jump on to read the days postings here on clayart and
read someone has been poisoned it peaks my attention as to how and why this
happened.
Be Safe............... Taylor!!
Peace to all,
Sandy Miller
Thanks so much to all who responded!
On Wed, Feb 22, 2012 at 9:29 AM, marta matray wrote=
:
> dear sandy, vince, and all
>
> since i was always so inspired by the work of david shaner and hans coper=
,
> i also wanted to try manganese, but soon after i learned about the tragic
> death of both shaner and coper, i got scared to use manganese in any form=
.
> i still love though that beautiful warm blackness on their pots.
> my question is: what would be similar to the 'manganese look' after firin=
g,
> without the danger?
>
> thanks, marta
> http://www.mnartists.org/Marta_Matray
>
>
> > Sandy Miller wrote:
> > "Now I am confused.....So is manganese dioxide, the stuff we order from
> our
> > clay suppliers like Bailey, Tucker, Laguna, Standard etc. absorbed
> through
> > the skin? If only we could consult with David Shaner......"
> >
> > Hi Sandy -
> > Well, if only David Shaner were still around for so many reasons, but I
> > don't think he could tell you much about this. As I understand the
> > situation with Shaner, it was the firing fumes that so negatively
> affected
> > his health, not absorption through the skin. Edouard emailed me off-li=
st
> > and confirmed that manganese dioxide cannot be absorbed through the ski=
n.
> > The danger is from breathing the dust or the firing fumes.
> > - Vince
>
Bonnie Staffel on thu 23 feb 12
I came into the pottery era over 60 years ago when lead and other =3D
metallic
elements were freely used in glazes. I recall buying some masks but =3D
found
them too cumbersome so finally resorted to the white face masks when =3D
mixing
glazes. I also used the barium glazes as well. So in the past maybe 30 =3D
years
I stopped using the barium glazes on functional work, not because of =3D
finding
out that it was a possibly poisonous glaze, but because my customers
preferred my new white based glaze. I don't know how I reached the age =3D
of 90
with still relatively clean lungs and no big health issues except my =3D
weight
and a blood clot problem from a fall that happened several years ago. =3D
Maybe
it is in the genes? Take care and advantage of the current knowledge and
warnings about these substances.=3D20
Regards, Bonnie. =3D20
http://webpages.charter.net/bstaffel/
http://vasefinder.com/bstaffelgallery1.html
DVD Throwing with Coils and Slabs
DVD Introduction to Wheel Work
Charter Member Potters Council
David Woof on thu 23 feb 12
Hi all=3D2C
=3D20
My glaze ingredient weighing and dry mixing counter has a fan driven exhaus=
=3D
t vent directly across the counter in front of me=3D2C creating just enough=
n=3D
egative pressure so that fresh air being pulled from around and behind me w=
=3D
ill draw any speck of dust that may rise=3D2C away from my face=3D2C body=
=3D2C an=3D
d nose and toward the exhaust.
=3D20
Of course this precaution only addresses the tip of the problem of our inha=
=3D
ling of Manganese because when the lead was taken out of gasoline=3D3B seve=
ra=3D
l gasoline processors began to use manganese as a replacement for the lead.=
=3D
Hence the "puzzling rise" in asthma in young children and COPD in adults =
=3D
since that time.=3D20
=3D20
I think about this when I am driving or stuck in 12 lanes of rush traffic! =
=3D
Not only for me but for all the folks living down wind of the freeway. Re=
=3D
ad the MSDS for flux core MIG welding wire=3D2C and flux coated welding rod=
s.=3D
It is the strongest warning (scare) for Manganese fumes that I have read.
=3D20
Yet and so=3D3B as Vince says=3D2C use manganese intelligently.
=3D20
Focus also on all who have safely and intelligently used these "toxic" mate=
=3D
rials successfuly over very long and productive life times.=3D20
=3D20
Have courage=3D2C encourage others!(quit yer sniveling) be happy! smile!!!
=3D20
One intelligent thing we can do is to commit to spread the love=3D3B which =
ac=3D
tion begins a change in thought process which changes both personality and =
=3D
outlook=3D3B which in turn drives a sense of well being that effects our bo=
dy=3D
's ability to fend and care for itself. This starts with letting go of rese=
=3D
ntments over affronts or insults=3D3B real or imagined!
=3D20
Studies are reputed to have shown that the herb cilantro is very effective =
=3D
in assisting our body in removing heavy metals from our body. =3D20
The prepared remedy "Flor-Essence" and its little cousin "ESSIAC" contain h=
=3D
erbs reputed to be anti tumor=3D2C anti vivral=3D2C a blood cleanser=3D2C i=
mmune =3D
system booster=3D2C and a digestive system balm that help us eliminate all =
so=3D
rts of wartie nasties.
=3D20
I could cite these studies=3D2C but research has also shown that if one is =
no=3D
t concerned or curious enough to look it up for themselves then they won't =
=3D
do anything about it anyway=3D2C even if their life is at stake and one han=
ds=3D
it to them. So go do it if you care=3D2C and if you don't care I have not =
wa=3D
sted my precious pot making time. =3D20
=3D20
I offer nothing ever as medical advice. It is each persons's responsibility=
=3D
to self=3D2C to educate self=3D2C and make decisions for self. No decisio=
n is=3D
still a decision=3D2C we can't hide!
=3D20
=3D20
This is part of the exercise in taking responsibility not only for learning=
=3D
the supporting crafts and techniques for our craft but also for our health=
=3D
and lives.
=3D20
Love=3D20
=3D20
David
=3D20
________________________________________________________________________
1d. Re: Black Glaze
Posted by: "Vince Pitelka" vpitelka@DTCCOM.NET=3D20
Date: Wed Feb 22=3D2C 2012 5:06 pm ((PST))=3D20
=3D20
Marta wrote=3D3B"I still love though that beautiful warm blackness on their=
p=3D
ots. Myquestion is: what would be similar to the 'manganese look' after fir=
=3D
ing=3D2Cwithout the danger?"=3D20
=3D20
Hi Marta -There really is nothing that will do the same thing=3D2C but the =
qu=3D
estion issort of moot=3D2C since there is no danger at all if you use manga=
ne=3D
seintelligently.=3D20
Wear a proper twin-element face-fitting P-100 dust mask whenmixing=3D2C and=
v=3D
entilate your kiln very well.-=3D20
=3D20
Vince Vince PitelkaAppalachian Center for CraftTennessee Tech Universityvpi=
=3D
telka@dtccom.nethttp://iweb.tntech.edu/wpitelka/ =
=3D
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