Dan Saultman on mon 22 oct 07
Greetings all,
I have a very nice recipe for cone 04. Clear. No crazing or pinholing,
nice fit, however, It gets milky when too thick.
it is this milkiness that I want to remove. Does anyone have any
suggestions?
Here is the recipe...
Frit (Ferro) 3134....................42.4
Frit (Ferro) 3195....................42.4
Flint......................................6.5
EPK (Kaolin) ........................8.7
........................................100.00
add colorants and stains at 3.3
for saturated colors.
This is a great glaze to use when spraying a clear coat over commercial
underglazes.
Here's a sample: http://saultman.com/greenPlaque.html
Dan
Dan Saultman
Fine-Art Pottery
Detroit
http://www.saultman.com
Jeanie Silver on tue 23 oct 07
Hi Dan
You can control cloudiness and reduce pinholes in your low-fire clear most
easily by controlling application. You might try dipping your pieces in
water a few minutes prior to glazing. How long you wait to glaze is
relative to your body thickness-you can gauge by experimentation. Glaze
thickness is critical in these low-fire clears, and it is much easier to
limit glaze buildup on the body surface by limiting the absorbtion of the
clay body. The other thing that helps my low-fire clears-including the one
you posted- is a looong soak near the cone maturation point. Unreasonably
long. It helps clear cloudiness, and aids color response too. Hope this
helps.
Jeanie in Pennsylvania
Carlee Weston on tue 23 oct 07
Jeannie,
I wonder if your soaking idea would help on a cone 6 clear that does the same thing.
If it works I'll let you know.
Carlee
-------------- Original message from Jeanie Silver : --------------
> Hi Dan
> You can control cloudiness and reduce pinholes in your low-fire clear most
> easily by controlling application. You might try dipping your pieces in
> water a few minutes prior to glazing. How long you wait to glaze is
> relative to your body thickness-you can gauge by experimentation. Glaze
> thickness is critical in these low-fire clears, and it is much easier to
> limit glaze buildup on the body surface by limiting the absorbtion of the
> clay body. The other thing that helps my low-fire clears-including the one
> you posted- is a looong soak near the cone maturation point. Unreasonably
> long. It helps clear cloudiness, and aids color response too. Hope this
> helps.
> Jeanie in Pennsylvania
>
> ______________________________________________________________________________
> Clayart members may send postings to: clayart@lsv.ceramics.org
>
> You may look at the archives for the list, post messages, or change your
> subscription settings here: http://www.acers.org/cic/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at melpots2@visi.com
Jeanie Silver on wed 24 oct 07
Dear Kusnik
Can you explain 'two-phase glaze and what immiscibility is? I'd really like
to know...also, do you mean 'alumina hydroxide?'
Jeanie in Pennsylvania
Edouard Bastarache Inc. on wed 24 oct 07
Aluminium Hydroxides
Aluminium forms a range of hydroxides; some of
these are well characterised crystalline
compounds, whilst others are ill-defined amorphous
compounds. The most common trihydroxides are
gibbsite, bayerite and nordstrandite, whilst the
more common oxide hydroxide forms are boehmite and
diaspore.
Commercially the most important form is gibbsite,
although bayerite and boehmite are also
manufactured on an industrial scale.
Aluminium hydroxide has a wide range of uses, such
as flame retardants in plastics and rubber, paper
fillers and extenders, toothpaste filler,
antacids, titania coating and as a feedstock for
the manufacture of aluminium chemicals, e.g.
aluminium sulfate, aluminium chlorides, poly
aluminium chloride, aluminium nitrate.
Gis la revido,
(A la revoyure)
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://perso.orange.fr/smart2000/livres.htm
http://www.pshcanada.com/Toxicology.htm
http://www.ceramique.com/librairie/
http://www.flickr.com/photos/30058682@N00/
http://myblogsmesblogs.blogspot.com/
----- Original Message -----
From: "Kusnik"
To:
Sent: Tuesday, October 23, 2007 9:30 PM
Subject: Re: Here's a nice 04 Clear, but...
> Dear friend,
> Add to your clear glaze 1-2-3 or 4% aluminium
> hydroxide and pick up the one
> which works. The fault is due to immiscibility
> of two phase glaze lacking
> alumina.
> Yours truly, friend.
>
> -----Original Message-----
> From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG]
> On Behalf Of Dan Saultman
> Sent: Tuesday, 23 October 2007 11:03 AM
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Here's a nice 04 Clear, but...
>
> Greetings all,
>
> I have a very nice recipe for cone 04. Clear. No
> crazing or pinholing,
> nice fit, however, It gets milky when too thick.
> it is this milkiness that I want to remove. Does
> anyone have any
> suggestions?
>
> Here is the recipe...
>
> Frit (Ferro) 3134....................42.4
> Frit (Ferro) 3195....................42.4
> Flint......................................6.5
> EPK (Kaolin) ........................8.7
> ........................................100.00
>
> add colorants and stains at 3.3
> for saturated colors.
>
> This is a great glaze to use when spraying a
> clear coat over commercial
> underglazes.
>
> Here's a sample:
> http://saultman.com/greenPlaque.html
>
> Dan
>
> Dan Saultman
> Fine-Art Pottery
> Detroit
> http://www.saultman.com
>
> ____________________________________________________________________________
> __
> Clayart members may send postings to:
> clayart@lsv.ceramics.org
>
> You may look at the archives for the list, post
> messages, or change your
> subscription settings here:
> http://www.acers.org/cic/clayart/
>
> Moderator of the list is Mel Jacobson who may be
> reached at
> melpots2@visi.com
>
> ______________________________________________________________________________
> Clayart members may send postings to:
> clayart@lsv.ceramics.org
>
> You may look at the archives for the list, post
> messages, or change your
> subscription settings here:
> http://www.acers.org/cic/clayart/
>
> Moderator of the list is Mel Jacobson who may be
> reached at melpots2@visi.com
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.503 / Virus Database:
> 269.15.8/1089 - Release Date: 2007-10-23 19:39
>
>
Angela Davis on wed 24 oct 07
Thank you Edouard, I was researching Aluminum Hydroxide
for future use. In doing so I ran across this interesting article
by John Britt in Ceramics Today.
http://www.ceramicstoday.com/articles/alternative_materials.htm
I have concluded that Tums might cure some of the gaseous distresses
of our glazes also.
Angela Davis
In rainy Homosassa, home again after a 3 weeks visit to the dry mountains of
NC. Still beautiful though.
----- Original Message -----
From: "Edouard Bastarache Inc."
To:
Sent: Wednesday, October 24, 2007 10:42 AM
Subject: Re: Here's a nice 04 Clear, but...
> Aluminium Hydroxides
> Aluminium forms a range of hydroxides; some of
> these are well characterised crystalline
> compounds, whilst others are ill-defined amorphous
> compounds. The most common trihydroxides are
> gibbsite, bayerite and nordstrandite, whilst the
> more common oxide hydroxide forms are boehmite and
> diaspore.
>
> Commercially the most important form is gibbsite,
> although bayerite and boehmite are also
> manufactured on an industrial scale.
>
> Aluminium hydroxide has a wide range of uses, such
> as flame retardants in plastics and rubber, paper
> fillers and extenders, toothpaste filler,
> antacids, titania coating and as a feedstock for
> the manufacture of aluminium chemicals, e.g.
> aluminium sulfate, aluminium chlorides, poly
> aluminium chloride, aluminium nitrate.
>
>
>
> Gis la revido,
> (A la revoyure)
>
> Edouard Bastarache
> Spertesperantisto
>
> Sorel-Tracy
> Quebec
> http://perso.orange.fr/smart2000/livres.htm
> http://www.pshcanada.com/Toxicology.htm
> http://www.ceramique.com/librairie/
> http://www.flickr.com/photos/30058682@N00/
> http://myblogsmesblogs.blogspot.com/
>
>
>
> ----- Original Message -----
> From: "Kusnik"
> To:
> Sent: Tuesday, October 23, 2007 9:30 PM
> Subject: Re: Here's a nice 04 Clear, but...
>
>
>> Dear friend,
>> Add to your clear glaze 1-2-3 or 4% aluminium
>> hydroxide and pick up the one
>> which works. The fault is due to immiscibility
>> of two phase glaze lacking
>> alumina.
>> Yours truly, friend.
>>
>> -----Original Message-----
>> From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG]
>> On Behalf Of Dan Saultman
>> Sent: Tuesday, 23 October 2007 11:03 AM
>> To: CLAYART@LSV.CERAMICS.ORG
>> Subject: Here's a nice 04 Clear, but...
>>
>> Greetings all,
>>
>> I have a very nice recipe for cone 04. Clear. No
>> crazing or pinholing,
>> nice fit, however, It gets milky when too thick.
>> it is this milkiness that I want to remove. Does
>> anyone have any
>> suggestions?
>>
>> Here is the recipe...
>>
>> Frit (Ferro) 3134....................42.4
>> Frit (Ferro) 3195....................42.4
>> Flint......................................6.5
>> EPK (Kaolin) ........................8.7
>> ........................................100.00
>>
>> add colorants and stains at 3.3
>> for saturated colors.
>>
>> This is a great glaze to use when spraying a
>> clear coat over commercial
>> underglazes.
>>
>> Here's a sample:
>> http://saultman.com/greenPlaque.html
>>
>> Dan
>>
>> Dan Saultman
>> Fine-Art Pottery
>> Detroit
>> http://www.saultman.com
>>
>> ____________________________________________________________________________
>> __
>> Clayart members may send postings to:
>> clayart@lsv.ceramics.org
>>
>> You may look at the archives for the list, post
>> messages, or change your
>> subscription settings here:
>> http://www.acers.org/cic/clayart/
>>
>> Moderator of the list is Mel Jacobson who may be
>> reached at
>> melpots2@visi.com
>>
>> ______________________________________________________________________________
>> Clayart members may send postings to:
>> clayart@lsv.ceramics.org
>>
>> You may look at the archives for the list, post
>> messages, or change your
>> subscription settings here:
>> http://www.acers.org/cic/clayart/
>>
>> Moderator of the list is Mel Jacobson who may be
>> reached at melpots2@visi.com
>>
>>
>>
>> --
>> No virus found in this incoming message.
>> Checked by AVG Free Edition.
>> Version: 7.5.503 / Virus Database:
>> 269.15.8/1089 - Release Date: 2007-10-23 19:39
>>
>>
>
> ______________________________________________________________________________
> Clayart members may send postings to: clayart@lsv.ceramics.org
>
> You may look at the archives for the list, post messages, or change your
> subscription settings here: http://www.acers.org/cic/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots2@visi.com
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition. Version: 7.5.488 / Virus Database:
> 269.15.9/1090 - Release Date: 10/24/2007 8:48 AM
>
>
Kusnik on wed 24 oct 07
Dear friend,
Add to your clear glaze 1-2-3 or 4% aluminium hydroxide and pick up the one
which works. The fault is due to immiscibility of two phase glaze lacking
alumina.
Yours truly, friend.
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Dan Saultman
Sent: Tuesday, 23 October 2007 11:03 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Here's a nice 04 Clear, but...
Greetings all,
I have a very nice recipe for cone 04. Clear. No crazing or pinholing,
nice fit, however, It gets milky when too thick.
it is this milkiness that I want to remove. Does anyone have any
suggestions?
Here is the recipe...
Frit (Ferro) 3134....................42.4
Frit (Ferro) 3195....................42.4
Flint......................................6.5
EPK (Kaolin) ........................8.7
........................................100.00
add colorants and stains at 3.3
for saturated colors.
This is a great glaze to use when spraying a clear coat over commercial
underglazes.
Here's a sample: http://saultman.com/greenPlaque.html
Dan
Dan Saultman
Fine-Art Pottery
Detroit
http://www.saultman.com
____________________________________________________________________________
__
Clayart members may send postings to: clayart@lsv.ceramics.org
You may look at the archives for the list, post messages, or change your
subscription settings here: http://www.acers.org/cic/clayart/
Moderator of the list is Mel Jacobson who may be reached at
melpots2@visi.com
Kusnik on fri 26 oct 07
Dear Jeanie Silver
Opacification of clear glazes can be achieved by a number of ways:
a) addition of opacifier such as tin, zirconium or titanium oxide,
b) opacification by gas bubbles,
c) opacification by dispersion of non-crystalline substance such as glaze
in another glaze (liquid immiscibility found frequently with silica and
boric oxide glass formers as in frits).In this case it can not
happen if the resulting glaze contains excess of alumina. The amount of
alumina to add to your glaze, you find out on line blend principle. You
add to your glaze clay in order of 2.5%,5.0% etc, or aluminium hydroxide.
Manufacturers of frits recommend using judicious amount of clay to add
to fritted glazes and thus overcome the partial opalescence.
Numerous technical papers were written on the subject of opalescence in
glazes since 1902. The most thorough one would be Emulsion Glazes:
Opacification by Liquid Immiscibility in Borosilicate Melts by I.Knizek.
Kusnik in Western Australia
----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Jeanie Silver
Sent: Wednesday, 24 October 2007 10:11 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Here's a nice 04 Clear, but...
Dear Kusnik
Can you explain 'two-phase glaze and what immiscibility is? I'd really like
to know...also, do you mean 'alumina hydroxide?'
Jeanie in Pennsylvania
____________________________________________________________________________
__
Clayart members may send postings to: clayart@lsv.ceramics.org
You may look at the archives for the list, post messages, or change your
subscription settings here: http://www.acers.org/cic/clayart/
Moderator of the list is Mel Jacobson who may be reached at
melpots2@visi.com
Jeanie Silver on fri 26 oct 07
Dear Kusnik
Thankyou for that very clear explanation. I will try some alunina line
blends. This could be really useful to me.
Jeanie in Pennsylvania
stephani stephenson on tue 30 oct 07
resend:
Dan ,
In melt tests I notice frit 3134, a high boron frit
,
often displays milkines or cloudiness at cone 04/.
have you tried your glaze using frit 3195 only?
Stephani
(back in San Diego. air cleared here. deposit of ash
on everything.)
thanks to everyone who said hello.etc....lots and lots
of stories here. kindness and sadness.
Dan Wrote:
I have a very nice recipe for cone 04. Clear. No
crazing or pinholing,
nice fit, however, It gets milky when too thick.
it is this milkiness that I want to remove. Does
anyone have any
suggestions?
Here is the recipe...
Frit (Ferro) 3134....................42.4
Frit (Ferro) 3195....................42.4
Flint......................................6.5
EPK (Kaolin) ........................8.7
........................................100.00
add colorants and stains at 3.3
for saturated colors.
This is a great glaze to use when spraying a clear
coat over commercial
underglazes.
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
Ron Roy on thu 1 nov 07
Stephanie has a good point here - In past research I read about adding
alumina to a glaze to suppress bubbles.
However - if you simply replace 3134 with 3195 you get a whole lot more
alumina than you may need - and the expansion rate gets very low - it might
be a problem.
I would suggest doing a 5 part line blend between the original and one with
all 3195 frit and see what happens with the bubbles. The more you replace
the 3134 with 3195 the more durable the glaze looks as well.
RR
>Dan ,
>In melt tests I notice frit 3134, a high boron frit
>,
>often displays milkines or cloudiness at cone 04/.
>have you tried your glaze using frit 3195 only?
>Stephani
>(back in San Diego. air cleared here. deposit of ash
>on everything.)
>thanks to everyone who said hello.etc....lots and lots
>of stories here. kindness and sadness.
>
>
>Dan Wrote:
>I have a very nice recipe for cone 04. Clear. No
>crazing or pinholing,
>nice fit, however, It gets milky when too thick.
>it is this milkiness that I want to remove. Does
>anyone have any
>suggestions?
>
>Here is the recipe...
>
>Frit (Ferro) 3134....................42.4
>Frit (Ferro) 3195....................42.4
>Flint......................................6.5
>EPK (Kaolin) ........................8.7
>........................................100.00
>
>add colorants and stains at 3.3
>for saturated colors.
>
>This is a great glaze to use when spraying a clear
>coat over commercial
>underglazes.
>
>__________________________________________________
>Do You Yahoo!?
>Tired of spam? Yahoo! Mail has the best spam protection around
>http://mail.yahoo.com
>
>______________________________________________________________________________
>Clayart members may send postings to: clayart@lsv.ceramics.org
>
>You may look at the archives for the list, post messages, or change your
>subscription settings here: http://www.acers.org/cic/clayart/
>
>Moderator of the list is Mel Jacobson who may be reached at melpots2@visi.com
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Eleanora Eden on thu 1 nov 07
Last fall this glaze was posted here on clayart as a ^06 glaze:
3195 88
epk 12
I tested this and used it on a few pots. At ^04 it was a very
clear and bright shiny glaze. At ^06, where I am working, it was
not mature. If I was working at ^04 this is the glaze I would use.
On Insight 3195 is described thus: "It is a complete cone 06-02
leadless glaze with the addition of a little kaolin to suspend.
Add more kaolin in the upper ranges."
Eleanora
--
Bellows Falls Vermont
www.eleanoraeden.com
Russel Fouts on sat 3 nov 07
>> Last fall this glaze was posted here on clayart as a ^06 glaze:
3195 88
epk 12
>>
I also tested this glaze at ^04 and found what Elenora says to be
true, it was bright and clear.
I also tested it with varying small amounts of iron to try for a nice
amber over a white slip. Instead I got some very interesting browns
(tobacco?) colors and a kind of 'more brown than amber" amber.
All results were interesting.
Russel
Russel Fouts
Mes Potes & Mes Pots
Brussels, Belgium
Tel: +32 2 223 02 75
Mobile: +32 476 55 38 75
Http://www.mypots.com
Home of "The Potters Portal"
Over 3000 Pottery Related Links!
Updated frequently
"Look, it's my misery that I have to paint this kind of painting,
it's your misery that you have to love it, and the price of the
misery is thirteen hundred and fifty dollars. "
- Mark Rothko, In Art/Painting
Ron Roy on sun 4 nov 07
Hi Eleanora,
As I mentioned before - the calculated expansion of this glaze is very low
- but - because the % of boron is 21 we are warned that the calculated
expansion is unreliable. Which all means I don't know if the expansion is
too low. It needs to be tested to make sure it is nut a pot buster with all
of the clays anyone uses.
RR
>Last fall this glaze was posted here on clayart as a ^06 glaze:
>
>3195 88
>epk 12
>
>I tested this and used it on a few pots. At ^04 it was a very
>clear and bright shiny glaze. At ^06, where I am working, it was
>not mature. If I was working at ^04 this is the glaze I would use.
>
>On Insight 3195 is described thus: "It is a complete cone 06-02
>leadless glaze with the addition of a little kaolin to suspend.
>Add more kaolin in the upper ranges."
>
>Eleanora
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Lynn Goodman Porcelain Pottery on sun 4 nov 07
When I was in school I used a very similar glaze at 06:
frit 3195...90
om4 clay...10
It gave a shiny, transparent, well-behaved glaze that worked well on
any low-fire clay, either talc body or terra cotta. As long as you
didn't get it too thick, it was generally idiot-proof.
Lynn
Lynn Goodman
Fine Porcelain Pottery
Cell 347-526-9805
www.lynngoodmanporcelain.com
> Hi Eleanora,
> As I mentioned before - the calculated expansion of this glaze is
> very low
> - but - because the % of boron is 21 we are warned that the calculated
> expansion is unreliable. Which all means I don't know if the
> expansion is
> too low. It needs to be tested to make sure it is nut a pot buster
> with all
> of the clays anyone uses.
>
> RR
>
>> Last fall this glaze was posted here on clayart as a ^06 glaze:
>> 3195 88
>> epk 12
>> I tested this and used it on a few pots. At ^04 it was a very
>> clear and bright shiny glaze. At ^06, where I am working, it was
>> not mature. If I was working at ^04 this is the glaze I would use.
| |
|
