Paul Borian on fri 7 may 10
I know all dust is bad to breathe - but would the clay dust from a body
that contains no free silica (200 mesh) be not-as-bad as the dust from a
body that has, say, 10% silica added?
I am in the process of changing my body and plan to eventually remove
the silica (for other reasons) and was wondering whether it would make
any difference on the level of dust/health, etc?
Thanks,
Paul
Paul Herman on fri 7 may 10
Paul,
As far as I know, all clays contain some free silica, even the most
refined kaolins.
best,
Paul Herman
Great Basin Pottery
Doyle, California US
www.greatbasinpottery.com/
On May 7, 2010, at 9:28 AM, Paul Borian wrote:
> I know all dust is bad to breathe - but would the clay dust from a
> body
> that contains no free silica (200 mesh) be not-as-bad as the dust
> from a
> body that has, say, 10% silica added?
>
> I am in the process of changing my body and plan to eventually remove
> the silica (for other reasons) and was wondering whether it would make
> any difference on the level of dust/health, etc?
>
> Thanks,
>
> Paul
Phoenix Rising Farm on fri 7 may 10
Paul:
Please let me know how the body-change goes for you,
and which doctors are involved.
I would love to change mine...my back and most major joints
are shot. Changing to a 20-something year old body would be a
definite advantage!
Best,
Wayne Seidl
On 5/7/2010 12:28 PM, Paul Borian wrote:
> I know all dust is bad to breathe - but would the clay dust from a body
> that contains no free silica (200 mesh) be not-as-bad as the dust from a
> body that has, say, 10% silica added?
>
> I am in the process of changing my body and plan to eventually remove
> the silica (for other reasons) and was wondering whether it would make
> any difference on the level of dust/health, etc?
>
> Thanks,
>
> Paul
>
>
--
Phoenix Rising Farm
on the Houlton Road
Waite, Maine
Daniel Rotblatt on fri 7 may 10
First, this is my opinion based on my understandings - take it as
that. You all are adults and must make your own decisions as informed
adults - but be informed! I don't want to belittle the dangers of
silica but perhaps put them in perspective. In putting things in
perspective, since I have been an artist all my life and exposed to
all this stuff I do wear a dust mask (a good one, not a disposable)
when working with silica and grinding (alumina oxides are not good
either) - but I don't worry too much about it. The danger to exposure
to hazardous materials is rated by looking at three things:
1) type of material,
2) quantity of exposure (both amount and number of hours)
3) interactions with other materials.
To find out a little about the first two, always look at the MSDS
sheets for the clay or material you are using. Here's the Laguna Clay
MSDS lists:
http://www.lagunaclay.com/msds/
For example, B-Mix is listed as having a maximum of 33% silica. In
the health hazard section it states:
A single exposure will not result in serious adverse health effects.
Respirable crystalline silica (quartz) can cause silicosis, a fibrosis
(scarring) of the lungs. Silicosis may be
progressive; it may lead to disability and death. Crystalline silica
(quartz) inhaled from occupational sources
is classified as carcinogenic to humans. There are some studies that
show excess numbers of cases of
scleroderma and other connective tissue disorders in workers exposed
to respirable crystalline silica.
Silicosis increases the risk of tuberculosis. There are some studies
that show an increased incidence of
chronic kidney disease and end-stage renal disease in workers exposed
to respirable crystalline silica.
Now that sounds scary, but remember, people who live in the desert
breath silica whenever the wind blows. On the other side, I read a
report of a man who died of silicosis who worked in a factory loading
bags of silica flour 8 hours a day for under a year. This is an
example of quantity. He was probably breathing in a months worth of
the desert dwellers silica every day - and in powdered form.
Factories measure the amount of dust in the air and base precautions
on that.
About MSDS - People who make the MSDS are both imparting information
and playing a game of cover your ass - i.e the information is really
raw, but you should read them - BE INFORMED. Google the material you
are interested in and MSDS. It's best to go with the company you are
getting the material from, they are required to provide it and
different companies have different formulations for substances. For
example, the size of the silica particle is important to the hazard of
the material - particles the size of salt are less likely to get into
the air/lungs then silica flour.
The third is interaction of materials. One example I remember (and I
don't remember what the material was), but if interacted with
cigarette smoking it increased the chance of cancer by 1000% (10 times
the risk). One other (if memory serves) is Carbon tetrachloride which
used to be used as a dry cleaning of drapes. By itself no big deal,
the body clears it. But if you are exposed and drink alcohol the
combination can destroy your liver. I would guess it would be a large
exposure then an evening out getting really toasted....
Silica? There is a great amount of fear around it - but if you are
throwing clay 3 or 4 hours a week, you'll be more then all right with
basic precautions - dust mask when mixing dry materials, vacuum up
dust with hepa filter, etc. It's probably not much different then
going to the desert on a windy dusty day - you wouldn't think twice
about that. If you are throwing 8 hours a day, 5 days a week then you
should be more careful. You are in the class of industrial exposure
(both number of hours and the quantity of material) and should take
this very seriously. Further, many studios do not have proper
ventilation, etc.
A quick note: silica is only dangerous is breathed as dust - i.e.
silica in wet clay is completely harmless.
My 2 cents,
Dan Rotblatt
www.RotblattSculpture.com
On May 7, 2010, at 9:28 AM, Paul Borian wrote:
> I know all dust is bad to breathe - but would the clay dust from a
> body
> that contains no free silica (200 mesh) be not-as-bad as the dust
> from a
> body that has, say, 10% silica added?
>
> I am in the process of changing my body and plan to eventually remove
> the silica (for other reasons) and was wondering whether it would make
> any difference on the level of dust/health, etc?
>
> Thanks,
>
> Paul
On May 7, 2010, at 9:28 AM, Paul Borian wrote:
> I know all dust is bad to breathe - but would the clay dust from a
> body
> that contains no free silica (200 mesh) be not-as-bad as the dust
> from a
> body that has, say, 10% silica added?
>
> I am in the process of changing my body and plan to eventually remove
> the silica (for other reasons) and was wondering whether it would make
> any difference on the level of dust/health, etc?
>
> Thanks,
>
> Paul
steve graber on fri 7 may 10
i suspect no - =3D0A=3D0Ainorganic materials in general aren't "supposed" t=
o be=3D
in us unless they get there from proper foods or drinks.=3DA0 organics are=
t=3D
he same way in a sense.=3DA0 =3D0A=3D0Aand materials that=3DA0might not iri=
tate, or=3D
are not alergic NOW may become irritable or alergic in time with continued=
=3D
exposure.=3DA0 =3D0A=3DA0Steve Graber, Graber's Pottery, Inc=3D0AClaremont=
, Califo=3D
rnia USA=3D0AThe Steve Tool - for awesome texture on pots! =3D0Awww.grabers=
pott=3D
ery.com steve@graberspottery.com =3D0A=3D0A=3D0AOn Laguna Clay's website=3D=
0Ahttp:/=3D
/www.lagunaclay.com/blogs/ =3D0A=3D0A=3D0A=3D0A----- Original Message ----=
=3D0A> From=3D
: Paul Borian =3D0A> To: Clayart@LSV.CERAMICS.ORG=3D0A> Se=
nt: =3D
Fri, May 7, 2010 9:28:51 AM=3D0A> Subject: another question about clay dust=
&=3D
silica=3D0A> =3D0A> I know all dust is bad to breathe - but would the clay=
dus=3D
t from a body=3D0Athat =3D0A> contains no free silica (200 mesh) be not-as-=
bad =3D
as the dust from a=3D0Abody that =3D0A> has, say, 10% silica added?=3D0A=3D=
0AI am i=3D
n the process of changing my body and =3D0A> plan to eventually remove=3D0A=
the =3D
silica (for other reasons) and was wondering =3D0A> whether it would make=
=3D0Aa=3D
ny difference on the level of dust/health, =3D0A> etc?=3D0A=3D0AThanks,=3D0=
A=3D0APaul=3D
=3D0A=3D0A=3D0A
steve graber on fri 7 may 10
i somethimes think about getting an upgrade to a 20 something but that woul=
=3D
d likely piss off my wife.....=3DA0 =3D0A=3D0A=3D0A=3DA0Steve Graber, Grabe=
r's Potter=3D
y, Inc=3D0AClaremont, California USA=3D0AThe Steve Tool - for awesome textu=
re o=3D
n pots! =3D0Awww.graberspottery.com steve@graberspottery.com =3D0A=3D0A=3D0=
AOn Lagu=3D
na Clay's website=3D0Ahttp://www.lagunaclay.com/blogs/ =3D0A=3D0A=3D0A=3D0A=
----- Orig=3D
inal Message ----=3D0A> From: Phoenix Rising Farm =3D0A>=
To:=3D
Clayart@LSV.CERAMICS.ORG=3D0A> Sent: Fri, May 7, 2010 11:23:40 AM=3D0A> Su=
bjec=3D
t: Re: another question about clay dust & silica=3D0A> =3D0A> Paul:=3D0APle=
ase le=3D
t me know how the body-change goes for you,=3D0Aand which =3D0A> doctors ar=
e in=3D
volved.=3D0AI would love to change mine...my back and most major =3D0A> joi=
nts=3D
=3D0Aare shot.=3DA0 Changing to a 20-something year old body would be =3D0A=
> a=3D0A=3D
definite advantage!=3D0A=3D0ABest,=3D0AWayne Seidl=3D0A=3D0AOn 5/7/2010 12:=
28 =3D0A> PM=3D
, Paul Borian wrote:=3D0A> I know all dust is bad to breathe - but would th=
e =3D
=3D0A> clay dust from a body=3D0A> that contains no free silica (200 mesh) =
be =3D
=3D0A> not-as-bad as the dust from a=3D0A> body that has, say, 10% silica =
=3D0A> =3D
added?=3D0A>=3D0A> I am in the process of changing my body and plan to =3D0=
A> eve=3D
ntually remove=3D0A> the silica (for other reasons) and was wondering =3D0A=
> wh=3D
ether it would make=3D0A> any difference on the level of dust/health, =3D0A=
> et=3D
c?=3D0A>=3D0A> Thanks,=3D0A>=3D0A> =3D0A> Paul=3D0A>=3D0A>=3D0A=3D0A=3D0A--=
=3D0APhoenix Rising Fa=3D
rm=3D0Aon the Houlton =3D0A> Road=3D0AWaite, Maine=3D0A=3D0A=3D0A
steve graber on sat 8 may 10
.........or to put it another way, water is dangerous if you inhale too muc=
=3D
h of it........=3D0A=3DA0Steve Graber, Graber's Pottery, Inc=3D0AClaremont,=
Calif=3D
ornia USA=3D0AThe Steve Tool - for awesome texture on pots! =3D0Awww.graber=
spot=3D
tery.com steve@graberspottery.com =3D0A=3D0A=3D0AOn Laguna Clay's website=
=3D0Ahttp:=3D
//www.lagunaclay.com/blogs/ =3D0A=3D0A=3D0A=3D0A----- Original Message ----=
=3D0A> Fro=3D
m: Daniel Rotblatt =3D0A> To: Clayart@LSV.CERAMICS.=
OR=3D
G=3D0A> Sent: Fri, May 7, 2010 12:39:56 PM=3D0A> Subject: Re: another quest=
ion =3D
about clay dust & silica=3D0A> =3D0A> First, this is my opinion based on my=
und=3D
erstandings - take it as=3D0Athat.=3DA0 =3D0A> You all are adults and must =
make y=3D
our own decisions as informed=3D0Aadults - but =3D0A> be informed!=3DA0 I d=
on't w=3D
ant to belittle the dangers of=3D0Asilica but perhaps =3D0A> put them in pe=
rspe=3D
ctive.=3DA0 In putting things in=3D0Aperspective, since I have =3D0A> been =
an art=3D
ist all my life and exposed to=3D0Aall this stuff I do wear a dust =3D0A> m=
ask =3D
(a good one, not a disposable)=3D0Awhen working with silica and grinding =
=3D0A>=3D
(alumina oxides are not good=3D0Aeither) - but I don't worry too much abou=
t =3D
=3D0A> it.=3DA0 The danger to exposure=3D0Ato hazardous materials is rated =
by loo=3D
king =3D0A> at three things:=3D0A1) type of material,=3D0A2) quantity of ex=
posure=3D
(both amount =3D0A> and number of hours)=3D0A3) interactions with other ma=
teri=3D
als.=3D0A=3D0A=3D0A
David Woof on mon 10 may 10
Hi Daniel=3D2C Clayart folks=3D2C=3D20
=3D
t - i.e.
silica in wet clay is completely harmless.">
i would like to remind that silica is only damaging to our lungs in a certa=
=3D
in micron size range and everything else we cough up and swallow or spit aw=
=3D
ay harmlessly. It is not only people of the desert who breathe silica dail=
=3D
y. It is everywhere!!! It is one the most common elements of the earth and =
=3D
all living things depend upon it for life and cell building in one form or =
=3D
another. =3D20
=3D20
Virtually forever=3D2C I've been weighing and dry mixing clay and glazes wi=
th=3D
a negative pressure exhaust system (fan driven) in front of my work area a=
=3D
nd a fresh air ventilation system (open window) behind me so that fresh air=
=3D
is drawn around me and past my natural breathing apparatus (nose) where it=
=3D
then picks up and carries any harmful particles outside where the wind the=
=3D
n blows these harmful substances out over the countryside to the park=3D2C =
pl=3D
ayground or backyard sunbathing beauty watching her grandkids whooping it u=
=3D
p in the (silica) sand box. =3D20
=3D20
NOW for those who must feed their particular neurosis or addiction to FEAR!=
=3D
!! hurry and vacuum out your Bread Oven and Toaster with a HEPA filter bec=
=3D
ause wheat flour has a very high silica content and all those charred and b=
=3D
urned bread crumbs could be a serious source of free silica. Pinch your no=
=3D
se and don't inhale when you munch yer eggs and toast!
=3D20
David Woof...coughing up silica and picking boogers in the Clarkdale=3D2C A=
ri=3D
zona desert...where I ignore most of the "real" problems that seem to be ou=
=3D
tweighing the imaginary or invented ones that Arizona is currently inventin=
=3D
g=3D3B and they aren't in the studio where I've been slapping clay with wil=
d =3D
abandon for 50 some years and where I never lick my fingers or sniff unknow=
=3D
n substances........My lungs work very well and I can dance all night with =
=3D
an able partner. I can still raise a pretty good cloud of dust!!! Come da=
=3D
nce=3D2C fear kills!!!
________________________________________________________________________
11d. Re: another question about clay dust & silica
Posted by: "Daniel Rotblatt" d.rotblatt@VERIZON.NET=3D20
Date: Fri May 7=3D2C 2010 12:49 pm ((PDT))
=3D20
First=3D2C this is my opinion based on my understandings - take it as
that. You all are adults and must make your own decisions as informed
adults - but be informed! I don't want to belittle the dangers of
silica but perhaps put them in perspective. In putting things in
perspective=3D2C since I have been an artist all my life and exposed to
all this stuff I do wear a dust mask (a good one=3D2C not a disposable)
when working with silica and grinding (alumina oxides are not good
either) - but I don't worry too much about it. The danger to exposure
to hazardous materials is rated by looking at three things:
1) type of material=3D2C
2) quantity of exposure (both amount and number of hours)
3) interactions with other materials.
=3D20
To find out a little about the first two=3D2C always look at the MSDS
sheets for the clay or material you are using. Here's the Laguna Clay
MSDS lists:
=3D20
http://www.lagunaclay.com/msds/
=3D20
For example=3D2C B-Mix is listed as having a maximum of 33% silica. In
the health hazard section it states:
=3D20
A single exposure will not result in serious adverse health effects.
=3D20
Respirable crystalline silica (quartz) can cause silicosis=3D2C a fibrosis
(scarring) of the lungs. Silicosis may be
progressive=3D3B it may lead to disability and death. Crystalline silica
(quartz) inhaled from occupational sources
is classified as carcinogenic to humans. There are some studies that
show excess numbers of cases of
scleroderma and other connective tissue disorders in workers exposed
to respirable crystalline silica.
Silicosis increases the risk of tuberculosis. There are some studies
that show an increased incidence of
chronic kidney disease and end-stage renal disease in workers exposed
to respirable crystalline silica.
=3D20
Now that sounds scary=3D2C but remember=3D2C people who live in the desert
breath silica whenever the wind blows. On the other side=3D2C I read a
report of a man who died of silicosis who worked in a factory loading
bags of silica flour 8 hours a day for under a year. This is an
example of quantity. He was probably breathing in a months worth of
the desert dwellers silica every day - and in powdered form.
Factories measure the amount of dust in the air and base precautions
on that.
=3D20
About MSDS - People who make the MSDS are both imparting information
and playing a game of cover your ass - i.e the information is really
raw=3D2C but you should read them - BE INFORMED. Google the material you
are interested in and MSDS. It's best to go with the company you are
getting the material from=3D2C they are required to provide it and
different companies have different formulations for substances. For
example=3D2C the size of the silica particle is important to the hazard of
the material - particles the size of salt are less likely to get into
the air/lungs then silica flour.
=3D20
The third is interaction of materials. One example I remember (and I
don't remember what the material was)=3D2C but if interacted with
cigarette smoking it increased the chance of cancer by 1000% (10 times
the risk). One other (if memory serves) is Carbon tetrachloride which
used to be used as a dry cleaning of drapes. By itself no big deal=3D2C
the body clears it. But if you are exposed and drink alcohol the
combination can destroy your liver. I would guess it would be a large
exposure then an evening out getting really toasted....
=3D20
Silica? There is a great amount of fear around it - but if you are
throwing clay 3 or 4 hours a week=3D2C you'll be more then all right with
basic precautions - dust mask when mixing dry materials=3D2C vacuum up
dust with hepa filter=3D2C etc. It's probably not much different then
going to the desert on a windy dusty day - you wouldn't think twice
about that. If you are throwing 8 hours a day=3D2C 5 days a week then you
should be more careful. You are in the class of industrial exposure
(both number of hours and the quantity of material) and should take
this very seriously. Further=3D2C many studios do not have proper
ventilation=3D2C etc.
=3D20
A quick note: silica is only dangerous is breathed as dust - i.e.
silica in wet clay is completely harmless.
=3D20
My 2 cents=3D2C
=3D20
Dan Rotblatt
www.RotblattSculpture.com
=3D20
=3D20
=3D20
_________________________________________________________________
The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with H=
=3D
otmail.=3D20
http://www.windowslive.com/campaign/thenewbusy?tile=3D3Dmulticalendar&ocid=
=3D3D=3D
PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_5=3D
| |
|
