AMACO V-359 Ultra White UnderglazeInfo Ultra White Velvet Underglaze is a bright and opaque white at cone 05, a frosty color at cone 5, and maintains its vividness at cone 10.
AMACO V-362 Ultra Black UnderglazeInfo Ultra Black Velvet Underglaze fires to a beautiful soft, dark matte color at cone 05 then deepens to a darker black at cone 5 and maintains it’s shade at cone 10.
AMACO V-379 Ultra Violet UnderglazeInfo Ultra Violet Velvet Underglaze is a soft, pinkish-purple at cone 05, darkens slightly at cone 5, then lightens when fired to cone 10 but still maintains its violet shade.