Alisa Liskin Clausen on tue 9 may 06
Glaze test for Clear Base, cone 6, ox., Jayne Shatz CM article
Source: CM Sept. 2005, article on Jayne Shatz.
Fired on mid fire white stoneware.
Firing ramp with an electric controller is:
100c p/h to 600c (212f - 1112f)
150c p/h to 1140c (302f - 2084f)
80c p/h to 1220c (176f - 2228f)
15 min. soak
cool down max. to 900c (1652f)
Hold 1 hour
Shut off kiln
8.7 Barium Carb.
25 Gerstley Borate
38 Custer Spar
Note: All raw materials are measured up or down to the nearest half
decimal. Colorants or additives to a 100 gram batch are measured in percent
to the 100 gram batch.
Gloss, transparent glaze.
Described as a "great liner glaze" in article. I would choose something
else, without Barium and without so much Gerstly Borate. I made this glaze
with a boron frit instead of G. B. and the result looked the same, with a
very good melt. I would suggest also subbing Strontium for the Barium.
That would get rid of the Barium and since there are no color enhancing
issues, (which I have found Strontium not to be as good as catalyst as
Barium) it could be a success. 100 gr. Barium equals 74.8 gr. Strontium
carb. (6.5 gr. Strontium for this recipe).
Regards from Alisa in Denmark