Below are a majority of the reduction glazes (which I make myself) that I use. A reduction firing is achieved in a gas kiln by reducing the presence of oxygen in the firing process at a high temperature. These glazes are achieved at Cone 10 reduction - 2350 deg. Each firing is unique so there is variation in the glaze result. This firing process takes 12 to 16 hours manually and several days for the kiln to cool before the pieces can be removed.
John's Red with ferguson yellow base.	eggplant on porcelain. On darker clay eggplant is dark/deep purple.
Joe's green & ferguson yellow	Blue
Black - matte finish	Base Glaze is Ferguson Yellow - wheaty with brown specks. The carved area is glazed with wood ash & colorant on bare clay.