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Old 04-29-2020, 06:12 AM
Josh Bernbaum Josh Bernbaum is offline
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I agree, I'm almost always using colour in my work so that when I occasionally make an all clear piece, I have a bit of trouble judging the heat sometimes. Sometimes.. You won't need much cobalt, since it's such a strong additive. You will need a decent gram scale (down to tenths or even hundredths of a gram) if you want repeatable results. One gram of cobalt oxide in 5 kilos may even be more than you want, which may be slightly different with the carbonate. You can do small test melts, see if you like the tone, and then multiply for larger melts. Take good notes for later.
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