Ababi on sat 31 aug 02
Hello June
The way I see the results, both from Matrix and Insight I trusts these results more
than empirical
The problem is the huge amount of the soluble materials. this is a great example for
the need of frits
Last week I tested two crystal glazes in regular firing ( my kiln cools slower than the
round ones faster than Ron and john's offer.) The same analysis.
The one with the 2120 gave small crystals while the one with the soda ash did not
mature- was matte glaze, like the soda wash vanished, perhaps migrant into the clay,
I think the teacher, I will look in my files for ^6 glazes without a too expensive material
also without any European materials and send in a separated letter. To make it less
heavy I shell not add the analysis
Ababi Sharon
Glaze addict
Kibbutz Shoval Israel
localpotter@walla.co.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
---------- Original Message ----------
>Here is an empirical match for FRIT 3110 that I did on Tony Hansen's
>software. It would be better to reformulate the recipe itself, than trying to
>make up separate batches of this frit substitute.
>Yes, frits are expensive, but when you calculate how little is in each pot
>you glaze, you talking of a few extra pennies.
>I think it's better to raise the price of you mug by 10 or 20 cents than to
>try to use this substitute. You'll notice all that soluble soda ash which can
>present some problems.
>If you calculate the whole recipe, it might be possible to avoid the soda
>ash; but maybe not. It depends on the whether or not the recipe calls for
>more sodium through Nepheline Syenite or Potspar etc.
>FRIT 3110 SUBSTITUTE:
>13.20 CUSTER FELDSPAR
> 7.10 WHITING
>39.80 SODA ASH
>35.33 SILICA
> 4.57 BORAX
>Regards,
>June
>______________________________________________________________________________
>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.
| |
|
