[Clayart] glaze substitutions

[Mary Winter]

Hi All,

I am living in Germany and am faced with the realization that I am unable
to buy some of the tried and true glaze chemicals that go into my favorite
glazes. I hope someone can give me the heads up on how to substitute
chemicals available in Germany fpr Gerstley Borate and Frit 3110? I am sure
there will be a couple more in a couple months. I am used to firing to cone
11ish in my old 40 cu ft natural gas updraft kiln and now have a much
smaller, although fine, electric to fire to cone 6 in oxidation. Yipes,
completely different. I will rise to the challenge but wouldn't mind a
little advice and help.

Cheers and Happy New Year to all.

Mary Winter
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[wsc...@twc.com]

Look for Colmanite and frit 4110
William Schran
wsc...@twc.com
703-505-1617

[Snail Scott]

> On Dec 28, 2017, at 11:54 AM, Mary Winter <mary...@gmail.com> wrote:
> I am living in Germany and am faced with the realization that I am unable
> to buy some of the tried and true glaze chemicals that go into my favorite
> glazes.

Have you looked at Alisa Liskin Clausen’s glaze-test postings? She’s a long-time Clayart member - a US potter who emigrated to Denmark and did thousands of tests to explore the use of European glaze materials. I suspect that much of what she gets in Denmark is also available in Germany. Her testing archives are a treasure trove! Just Google her name.

-Snail

[Edouard Bastarache]

Smart,peux-tu trouver des substituts pour le Gerstley Borate et la Fritte
3110 avec des matériaux allemands ou européens.

Here is my take on sustituting for Gerstley Borate using european raw
materials, published on Smart's site. At that time Fritte 3110 was
availanle in Europe. Try Richoux

http://smart2000.pagesperso-orange.fr/gerstley_borate0.htm#substitutions


Plejkore,

Edouard Bastarache
Spertesperantisto

My Books :
http://bookslivreslibroj.blogspot.ca/
http://foolingaroundwith.blogspot.ca/
http://newbookclays.blogspot.ca/
http://quebecstonewareglazes.blogspot.ca/
http://quebecstonewareglazesii.blogspot.ca/

---
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[Bryan Johnson]

A glaze calc program is very helpful for converting recipes. I looked at
one German supplier and while frits didn't have an analysis that was
available else where, digitalfire for one.

Bryan Johnson

URL: <https://lists.clayartworld.com/pipermail/clayart/attachments/20171228/b686e4b3/attachment.html>

[ron...@ca.inter.net]

Hi Mary,

I can help with that - what I need are the analysis for the frits you
can buy there and the glaze recipes.

It may be that they will not give up the analysis for the frits but
sometimes they will give the Seger unity formula. If so I can work out
the analysis from that.

RR

Ron Roy
ron...@ca.inter.net
Web page ronroy.net

[David Woof]

Hi Mary,

here, USA, I've subbed out my Gerstley Borate with frit 3134. Usually a 1 to 1 sub at 10% Gerstley or less, but with higher % s, sometimes with a bit of "tinkering" to get the results I was seeking.

Snail mentioned Alisa Clausen as a Denmark source for information. I recall that Alisa did extensive work with successfully subbing out Gerstley Borate with Frit 3134..


RR (or others) can help you fine tune as soon as a close EU or German frit is found.


Since all glazes, of a given type and given cone, follow an Empirical formula, there must then be a close equivalent to 3110 and 3134, somewhere in the northern EU, adjusted of course, for use with the usually available raw materials in that region.


Keep in touch, it will be of interest to others also, I'm sure.


best,

David Woof

**********************************************************


________________________________
From: Clayart <clayart...@lists.clayartworld.com> on behalf of Mary Winter <mary...@gmail.com>
Sent: Thursday, December 28, 2017 10:54 AM

To: Clayart international pottery discussion forum

Subject: [Clayart] glaze substitutions

URL: <https://lists.clayartworld.com/pipermail/clayart/attachments/20180101/bb1aca0f/attachment.html>

[Edouard Bastarache]

Smart's take on this issue.
Friite 3110 is available in Europe.
Richoux S.A. is shut down.
He does not if fritte P-2954 is still available in Europe
here is no equivalent for Gersley in Europe.
You may use my propositions if the needed raw materials are available

Plejkore,

Edouard Bastarache
Spertesperantisto

My Books :
http://bookslivreslibroj.blogspot.ca/
http://foolingaroundwith.blogspot.ca/
http://newbookclays.blogspot.ca/
http://quebecstonewareglazes.blogspot.ca/
http://quebecstonewareglazesii.blogspot.ca/












----- Original Message -----

From: <smart....@orange.fr>
To: "Edouard Bastarache" <edou...@colba.net>
Sent: Sunday, December 31, 2017 11:44 AM
Subject: Re: [Clayart] glaze substitutions


> Edouard,
>
> Cet article date de 2001... la société Richoux a disparu depuis. Je ne
> sais pas si on peut retrouver de la fritte P.2954 quelque part...
>
> La fritte 3110 est disponible en Europe, on la trouve un peu partout chez
> les fournisseurs Français (Céradel, Solargil, Les cousins, etc...)
>
> Il n'y a pas d'équivalent ici pour le Gerstley Borate.
>
> Cordialement,
> Denis
>
> Smart.Conseil / Smart2000
> Le site Français dédié aux passionnés de céramique
> The French site dedicated to ceramics lovers
> Contact : smar...@wanadoo.fr
> Website : http://perso.wanadoo.fr/smart2000/
>
> --------------------------------------------------
> From: "Edouard Bastarache" <edou...@colba.net>
> Sent: Thursday, December 28, 2017 11:30 PM

> To: "Clayart international pottery discussion forum"

> <cla...@lists.clayartworld.com>
> Cc: "Smart.Conseil" <smar...@wanadoo.fr>
> Subject: Re: [Clayart] glaze substitutions

>
>> Smart,peux-tu trouver des substituts pour le Gerstley Borate et la Fritte
>> 3110 avec des matériaux allemands ou européens.
>>
>> Here is my take on sustituting for Gerstley Borate using european raw
>> materials, published on Smart's site. At that time Fritte 3110 was
>> availanle in Europe. Try Richoux
>>
>> http://smart2000.pagesperso-orange.fr/gerstley_borate0.htm#substitutions
>>
>>
>> Plejkore,
>>
>> Edouard Bastarache
>> Spertesperantisto
>>
>> My Books :
>> http://bookslivreslibroj.blogspot.ca/
>> http://foolingaroundwith.blogspot.ca/
>> http://newbookclays.blogspot.ca/
>> http://quebecstonewareglazes.blogspot.ca/
>> http://quebecstonewareglazesii.blogspot.ca/
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> ----- Original Message -----
>> From: "Mary Winter" <mary...@gmail.com>

[ron...@ca.inter.net]

Just to save time and disappointment - frit 3110 only has 2.6% boron -
gerstley borate has 26 to 27% boron so trying to sub 3110 for GB is
impossible.

Frit 3134 has 23% boron so it is a possible solution for some glazes.
A frit with more boron would probably be a better answer.

RR

[Fred]

I have a 5 gallon tub of Gastly borate as Karl Platt named it. It is the old original kind of gerstly and I have had it about 35 years and never used much . I think I will put it up on Potter Barter.
I am under orders from higher authority to down size before I croak. Also have loads of old chemicals - every thing known to potters.

Fred Paget
Twin Dragon Studio
Mill Valley, CA

[wsc...@twc.com]

Perhaps Ferro Frit #3249 might work as it has almost 29% Boron..... though it does bring along magnesium...
My preferred frit substitution for Gertsley Borate in raku glazes was frit# 3195.


Bill
William Schran
wsc...@twc.com
703-505-1617

[ron...@ca.inter.net]

Hi Bill,

I just tried it - You are right - the MgO is too high. Still if you
need a glaze with a low expansion .......

RR

Quoting wsc...@twc.com:

> Perhaps Ferro Frit #3249 might work as it has almost 29% Boron.....
> though it does bring along magnesium...
> My preferred frit substitution for Gertsley Borate in raku glazes
> was frit# 3195.

> - the MgO is too high

[Mary Winter]

Hi Everyone.

I so appreciate everyone's great suggestions for my material substitution
issues. Yipes! I have compiled a list of fritts that my supplier here in
Munich has along with their Seger Formulas and will email this to RR when I
have my glaze recipes organized in a word document so I can take him up on
his amazing offer to do some calculations for me. I also realize I need to
find user friendly glaze calculation software. I have been looking at the
one from digital fire. Many thanks for everyone's thoughts and ideas and I
will be forging ahead to find solutions that work here in Germany.

Vielen dank fuer alles,

Mary Winter

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