5 lbs. Midnight Crystal Glaze Cone 10 Oxidation
Description: One of the easiest crystal glazes to use. This is not a "crystalline" glaze and doesn't require a fancy soak program. Food safe and stable at cone 10 oxidation. Shown on porcelain. This glaze is available in different colors and they can be used in combinations with each other for nice effects.
Important Info: Ways to have success with these fast-fire crystal glazes:
1) Porcelain works the best. Works on some bmix and stonewares. We bisque porcelain to cone 08.
2) Use a hydrometer to get these glazes thinned to 40 on the hydrometer.
3) Use a 60 mesh bowl screen to screen them a little.
4) Dip for a 2 or 3 count. (not too thick-)
5) When loading your electric kiln remember to space your work apart slightly so the heat can reach the center of the kiln. (notice I always place cookies under my tests to make sure I don't mess up my kiln shelves. Once I know a glaze better I know if I can fire without placing them onto cookies).
6) Fire in an electric kiln that's meant to go to cone 10. If the walls on your kiln are thin it will take longer to get to cone 10 and it will wash out the color and crystals. We use a Cone Art Kiln which is designed and built to get to cone 10.
7) Get to cone 10 by going at least 400 degrees an hour.
8) Use a Self-supporting cone 10 witness cone in the spy hole and make sure your cone is bent halfway over when you shut down.
9) Cool normally. You just don't want to thermal shock your wares.