Can be used on earthenware clays which have been bisqued to cone 04. Perfect for creating beautiful majolica paintings! Truly safe products; the colors are intermixable, the glazes are dinnerware safe and they clean up easily with water. Firing Range: Cone 05-06. AP Non-Toxic. Deluxe pack includes 12 pint (16 oz.) jars: Clear, Bright White, Yellow, Chartreuse, Grass Green, Royal Blue, Purple, Pink, Gray, Black, Orange and Red.