I bought black spots (spots) on the pottery. How can I get rid of this black spot?
It is iron oxide, drop in the firing cable caused, go away
Go away ~ don't suck, optimistic about the next time on the line
It is iron oxide, in the firing time of clay containing iron, is not clear, or fall in the firing cable caused by the removal of little significance, only using hydrofluoric acid (careful) wash!
