Black Iron Oxide Fe3O4 (powder form)
Raw colour of powder: Black
Colour responses after firing:
Painted onto clay: Dark-brown, black
Painted onto biscuit: Dark-brown, black
Painted onto unfired glaze: Darkish brown, black, green
Mixed into glaze: Darkish brown, black, green
Reduction firing: Darkish brown, black, green, pale blue (celadon)
