Standard Underglazes, which come in dry form, are for use on all clay bodies by brushing, spraying, printing, sponging or spattering These colors may be applied directly to greenware or bisqued ware, covered with a clear or semi-opaque glaze and fired to the maturing temperature of the glaze.
Underglazes are for use on all clays using a variety of techniques. Colors may be applied directly to greenware or bisqued ware, covered with a clear or semi-opaque glaze and fired to the maturing temperature of the glaze. We suggest using zinc-free glazes with all underglaze colors. When using a pink or purple underglaze which will be fired above Cone 4, a glaze containing 6-8% Calcium Oxide (12-15% Calcium Carbonate) is recommended.
We strongly recommend testing for all clays, glazes and colors using your own techniques and firing methods.
Underglazes are mixed in equal parts with Standard’s E-100 Painting Medium, for example, 1 tablespoon dry underglaze to 1 tablespoon E-100, or 4 oz. (by weight) of underglaze to 4 liquid ounces of E-100. Underglazes may be thinned with water.
Brush cleaning is best done while underglazes are still moist.