Anyone know why my gold foil turned black under the enamels (transparent, lead-bearing; Reds, Pinks, Blues, Greens, Aquas, Yellow) I was testing?
I first fired a layer of transparents and then fired foil on that layer, at 1450 degrees F. Then fired transparents over that. Black. So I re-fired at 1500 F. Still black.
The silver foil I was testing on the same tiles with the same colors looks lovely.