Raku Glaze Raku Pottery Glaze: Copper Matt Jonathan Carlson · September 11, 2018 The flashing will vary with each firing. Both of these were fired to 1875F and given medium post-firing reduction using newspaper after pulling from the kiln. Copper Matt Add %75 Gerstley Borate %12.5 Nepheline Syenite %12.5 EPK Add: %8 Copper Carbonate %2 Cobalt Carbonate Add: %16 Synthetic Bone Ash See More Raku Pottery Glazes
