1, 3, 5, 8
1. Can be used as a body stain in Porcelain at high temperatures. All of the brown colours can be used as ‘body stains’ but will vary in shade considerably depending on the composition of the body and temperature at which it is fired.
3. Maximum firing limit 2300ºF (1260ºC)
5. Do not use zinc in glazes
8. Best with no zinc. Calcium oxide content as calcium carbonate should be between 12-15% for best colour development. Adding the oxide with wollastonite, a natural calcium silicate, often gives better uniformity. The increased silica from the wollastonite must be subtracted or the glaze will have a poor surface.