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Showing results for tags 'saggar firing'.
I have recently carried some successful trials using saggars to produce cone 6 copper red reduction glazes in an electric kiln. I generated a reduction atmosphere by adding a small amount of black iron oxide mixed with powdered charcoal to the bottom of a saggar with a test piece painted with Selsor red copper reduction glaze (see formula in "The Complete Guide to Mid-range Glazes " by J. Britt pg 100). I started with a copper red cone 6 glaze because it is easy to see if there is reduction; red=reduction / green=no reduction. The iron oxide/ charcoal mixture reacted to produce a reducing c