Eleanora Eden on sat 9 apr 05
I want to make some tests for cone 1 glaze. I have some cone 3 I
like. Is there a simple rule of thumb for doing this or is it off to
glaze calculation land for me once again?
I have made myself dizzy today looking in the clayart archives,
pouring over notes from glaze tech classes I took over the years.
All my extensive pages of calculations and notes assume some basic
knowledge I have forgotten. I have just watched Tony Hansen's very
meticulous tour of his Insight program.
I have Macintosh and my husband has Windows, so just the easiest most
straightforward one to use is what I want.
Thanks ever so,
Eleanora
John Hesselberth on sun 10 apr 05
Hi Eleanora,
I have heard Pete Pinnell say that about 0.05 more boron (unity formula
terms) will lower maturity temperature 1 cone. I would estimate more
like .07 or 0.8, but that could be a starting place for you. Since you
are only trying to move a couple cones that might work well enough if
the glazes are well balanced to start with. Therein lies potential
trouble. So many glazes, particularly matte ones, are not well balanced
that rules of thumb like that may not work. But give it a try there.
Regards,
John
On Apr 9, 2005, at 9:29 PM, Eleanora Eden wrote:
> I want to make some tests for cone 1 glaze. I have some cone 3 I
> like. Is there a simple rule of thumb for doing this or is it off to
> glaze calculation land for me once again?
>
> I have made myself dizzy today looking in the clayart archives,
> pouring over notes from glaze tech classes I took over the years.
> All my extensive pages of calculations and notes assume some basic
> knowledge I have forgotten. I have just watched Tony Hansen's very
> meticulous tour of his Insight program.
>
> I have Macintosh and my husband has Windows, so just the easiest most
> straightforward one to use is what I want.
>
> Thanks ever so,
>
> Eleanora
>
> _______________________________________________________________________
> _______
> 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.
>
>
John Hesselberth
http://www.frogpondpottery.com
http://www.masteringglazes.com
Eleanora Eden on sun 10 apr 05
Hi John,
I went to your mastering glazes site but it is for cone 6 glazes. I
feel like such a schlameel. I have learned glaze tech several times
in my life and all my notes assume a basic knowledge that I have
forgotten. Can you send me to someplace on the web where the basics
of glaze calculation are covered? Like what is a unity formula, (is
that where everything adds up to one?), what the basic limits are for
various temperatures. I'm worried that even a glaze program is
beyond me at this point.
If I were to buy a glaze program is there one you would recommend?
Thanks ever so,
Eleanora
>Hi Eleanora,
>
>I have heard Pete Pinnell say that about 0.05 more boron (unity formula
>terms) will lower maturity temperature 1 cone. I would estimate more
>like .07 or 0.8, but that could be a starting place for you. Since you
>are only trying to move a couple cones that might work well enough if
>the glazes are well balanced to start with. Therein lies potential
>trouble. So many glazes, particularly matte ones, are not well balanced
>that rules of thumb like that may not work. But give it a try there.
>
>Regards,
>
>John
>On Apr 9, 2005, at 9:29 PM, Eleanora Eden wrote:
>
>>I want to make some tests for cone 1 glaze. I have some cone 3 I
>>like. Is there a simple rule of thumb for doing this or is it off to
>>glaze calculation land for me once again?
>>
>>I have made myself dizzy today looking in the clayart archives,
>>pouring over notes from glaze tech classes I took over the years.
>>All my extensive pages of calculations and notes assume some basic
>>knowledge I have forgotten. I have just watched Tony Hansen's very
>>meticulous tour of his Insight program.
>>
>>I have Macintosh and my husband has Windows, so just the easiest most
>>straightforward one to use is what I want.
>>
>>Thanks ever so,
>>
>>Eleanora
>>
>>_______________________________________________________________________
>>_______
>>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.
>>
>John Hesselberth
>http://www.frogpondpottery.com
>http://www.masteringglazes.com
>
>______________________________________________________________________________
>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.
Daniel Semler on sun 10 apr 05
Hi Eleanora,
I have two notes on my website which show conversion between recipe and unity
formula and vice versa manually. I don't if they will help but perhaps they
might. :
http://www.clayosmos.com/glazes.html
Unity formula is so called because the molar quantities if the fluxes sum to 1.
For what you want to do, doing it manually would certainly bang it home, but a
glaze prog. would be easier. Most glaze calc. programs have features to see
limit formulae.
Hi John, I assume where you said "like .07 or .8" you meant "like .07 or .08" ?
Not meaning to nit-pick, just to clarify.
Thx
D
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John Hesselberth on sun 10 apr 05
On Apr 10, 2005, at 4:39 PM, Eleanora Eden wrote:
> If I were to buy a glaze program is there one you would recommend?
Hi Eleanora,
Some are going to think I paid you to ask this question because, of
course, I will recommend the one I wrote. But, seriously, you can
download a 60 day fully functional trial version of my program and at
least one or two of the others. Check them out.
But send me your recipe and I'll give you a couple options to try--a
couple others might too. If one of them works it might even get you
interested in pursuing glaze calc
Regards,
John
John Hesselberth
http://www.frogpondpottery.com
http://www.masteringglazes.com
John Hesselberth on sun 10 apr 05
On Apr 10, 2005, at 6:27 PM, Daniel Semler wrote:
> Hi John, I assume where you said "like .07 or .8" you meant "like .07
> or .08" ?
Yes,
John
John Hesselberth
http://www.frogpondpottery.com
http://www.masteringglazes.com
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