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Hi all, I want to try a formula for a ^5 gold glaze (it says 1230-1260 C, I suppose that's still ^5 ?) called "Gold Pigment" out of an old Ceramic Review issue, and I'm not sure what are the US equivalents to the UK materials the formula calls for. The entire formula is: Manganese dioxide 43 Copper oxide 5 Cobalt oxide 5 Red clay 57 Ball clay 4 Quartz 5 So what red clay? Redart? Which of all the different ball clays we have in the US?? If I use Silica 325 is it the same as the quartz this formula has? Is flint also the same as quartz? Also, another formula, a ^4-7 bronze, calls for china clay. Is it the same as kaolin? And to continue giving away that I know NOTHING of glaze formulation: how come this formula when added up is over 100? Thank you in advance for any wisdom you can send this way.