|Re: Copper ruby vs Selenium/Cadmium and "striking" -- beadiste||Post Reply||Edit||Forum||Where am I?|
I make copper red glazes by using glazes that include copper carbonate and tin oxide and fired in a reducing atmosphere. Copper reds often are a muddy shade.
In general, reduction firings starve the kiln (or glass furnace) of oxygen. The heated fuels combine with oxygen in the glaze or glass batch, changing the glaze color as oxygen leaves and the minerals are converted to different molecules.
I can't really comment on the use of gold to create red glass.