Glaze - Rogers Black

Custer Feldspar	20
Gerstley Borate	80
Red Iron Oxide	10
Cobalt Carbonate	10
Black Copper Oxide	10

This is a glossy black glaze that can produce flashes of red and copper. The glaze should be applied about medium (not too thin or thick) and then lightly reduce for just black or reduced heavily to produce the coppers and reds. You have to be quick from the kiln to the reduction chamber to get a lot of flashing. I have not had too much problem with the glaze running, but I imagine if you apply the glaze too heavily near the bottom or fire too hot, it could happen.

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Gary R. Ferguson - Raku Artist