there's 1%, 2%, and 3% copper carbonate oxides here. they look pretty cool.
posted overview into ceramics
previously we'd also done some clay slips (engobes - pronounced 'on gobes' not englobes as some might have it... ;)
the results spek for themselves. i am again taken by the great copper green, which has complete grown on me. i couldn't work out the fuss when i started, but copper is rapidly turning into the 'funnest' colour. browns and blues are dull: