HandsInCla@aol.com on thu 29 apr 99
Dear ClayArt Members:
Thanks for all of the helpful suggestions in response to my request for
information re: finding a substitute for Potassium Bichromate.
In my continued effort to come up with a replacement glaze for a burgundy
colored glaze that contained Potassium Bichromate I have come across a glaze
that is called "Burgundy" but this recipe contains Barium Carbonate.
I would appreciate any help in understanding how to replace Barium Carbonate
with Strontium Carbonate in the following recipe (from ClayArt Glaze
Database):
Burgundy (^6 Ox)
Kona Feldspar 53
Silica 20
Whiting 15
Barium Carbonate 6
EPK 6
Add: Mason Deep Crimson Stain 10
Any helpful suggestions offered would be greatly appreciated as the burgundy
colored glaze (we called it "Plum") which contained the potassium bichromate
was a favorite in the studio (used in combination with other glazes) and it
was line blended with another favorite studio glaze to produce a totally new
glaze. In effect, we will be losing two favorite glazes; however, we will
hopefully find recipes for two safe replacement glazes that will also be
lovely and will eventually becoming new favorites.
Thanks again for your help.
Linda
Stephen Grimmer on thu 29 apr 99
Linda,
Replace each part of Barium Carb with .75 parts Strontium to get an
equal molecular replacement. Some glazes will tolerate this substitution;
others will not and the appearance will be changed.
I can't speak to the durability of the glaze in question, so you should
check it out if it is to be used on functional surfaces.
good potting,
steve grimmer
marion illinois
----------
>From: HandsInCla@aol.com
>To: CLAYART@LSV.UKY.EDU
>Subject: How much Strontium to substitute for Barium
>Date: Thu, Apr 29, 1999, 6:40 AM
>
>----------------------------Original message----------------------------
>
>Dear ClayArt Members:
>
>Thanks for all of the helpful suggestions in response to my request for
>information re: finding a substitute for Potassium Bichromate.
>
>In my continued effort to come up with a replacement glaze for a burgundy
>colored glaze that contained Potassium Bichromate I have come across a glaze
>that is called "Burgundy" but this recipe contains Barium Carbonate.
>
>I would appreciate any help in understanding how to replace Barium Carbonate
>with Strontium Carbonate in the following recipe (from ClayArt Glaze
>Database):
>
>Burgundy (^6 Ox)
>
>Kona Feldspar 53
>Silica 20
>Whiting 15
>Barium Carbonate 6
>EPK 6
>
>Add: Mason Deep Crimson Stain 10
>
>Any helpful suggestions offered would be greatly appreciated as the burgundy
>colored glaze (we called it "Plum") which contained the potassium bichromate
>was a favorite in the studio (used in combination with other glazes) and it
>was line blended with another favorite studio glaze to produce a totally new
>glaze. In effect, we will be losing two favorite glazes; however, we will
>hopefully find recipes for two safe replacement glazes that will also be
>lovely and will eventually becoming new favorites.
>
>Thanks again for your help.
>
>Linda
>
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