Industrial ceramic pigments ferro's specialty industrial ceramic pigments are designed to color all types of special glazes and bodies used for industrial ceramics. our ceramic pigment range contains 25 ceramic stains that exhibit high purity, intensity and brilliance. Porcelain enamel coatings we offer engineered porcelain enamel frits in powder, paste, ready-to-mill and ready-to-use (rtu) forms. our products are specifically formulated to provide a wide range of chemical, physical and aesthetic properties to meet our customers' needs. Thompson enameltransparent colors1/2 oz jar, lead free vitreous enamel powder (gem green 2325) ... ceramic pigments can be added for even more color choices. create a crackled effect by using this water-based enamel over low-expansion enamelu2014will crackle when fired. ... color:gem green 2325. shipping information Thompson enamel has been a manufacturer of vitreous enamel for metal for over 119 years. thompson enamel currently manufactures glass products for many different kinds of applications. included in its product line are enamels for both metals and glass.