Concentrated, brilliant and opaque. Color is nearly the same before and after firing, making it perfect for decorating. Equally great when used to cover large areas quickly or for detailed painting and decoration. Paint on Cone 04 bisque and apply covering before final fire. Or, paint on greenware, fire to Cone 05-10, then apply a covering glaze for final fire. If left unglazed, Liquid Underglazes should not be used on surfaces which come in contact with food or drink. Food safe only when applied and fired under AMACO LG10 Clear Transparent Gloss Glaze. 2 oz. jar. Medium Blue. AP Seal, non-toxic.