Out of the kiln: testing black underglazes fired to S/W in oxidation.
Top tile is AWS/1G clay with strips of Tenmoku glaze (far left) and Mushadon (right)
Umbrella is Crank with clear strip of clear S/W glaze
Same glazes and same clays but fired in different kilns.
Top: in Electric kiln
Bottom: in Gas kiln
Four tiles on the left is a combination of oxides and three glazes, the four tiles on the right have underglazes with clear S/W glaze.