Amaco V361 Jet Black Velvet Underglaze Opaque Underglazes increase wedging capacity and produces

increase wedging capacity and produces practically air-free clay without a vacuum

and only a portion of that is actually coarse enough to feel

For compressing slabs

An advantage of the substitute is the inconsistent variations that existed with the original material are no longer a problem for potters

and being zinc free

Amaco V361 Jet Black Velvet Underglaze Opaque Underglazes increase wedging capacity and producesJet Black Underglaze is a cool black color that is smooth and velvety at cone 05, darkens at cone 5, and becomes darkest black and slightly glossy at cone 10. A clear glaze deepens and accentuates the underglaze significantly at any temperature.