Atlanta Clay is proud to carry Amaco’s lead free glazes and underglazes. All AMACO® glaze labeling features either the “AP” (Non-Toxic) seal or the “CL” (cautions required) seal of the Art and Creative Materials Institute, Inc. (ACMI). These seals are your assurance that the product was evaluated by an independent toxicologist and labeled according to ASTM D-4236/LHAMA—the federal standard for safe labeling of art materials.