5# Concord Grape Glaze (dry material)
Description: A deep purple, copper red glaze. It has the best purple when it's applied over Black Magic Slip. Glossy in surface and it's the best "fit" when it's applied over porcelain. These examples are on porcelain and over black magic slip. It's the only way we've been using this glaze.
Note 1: The blue flashing on the side of this mug happened where it was close to the burner flame.
Mixing: add water and screen twice thru an 80 mesh screen. Mix to about 50 on the hydrometer.
Note 2: It's Super Important to not bisque your wares too high. If you're bisque firing to cone 04 that's too hot! Don't listen to the clay supply house. They don't know the chemistry as well as glaze chemists. If you're woking in BMix: bisque to cone 08. If you're working in Porcelain: bisque to cone 010. If you're working in groggy bodies (and stoneware): bisque to cone 06.
Note 3: if your work in clay is bisque fired to the correct temperature all of this information should work well for you.
Application: Spray, or dip with a count to 4 to 6 seconds.
Firing: Cone 10 in reduction.