Opaque, cataloged, Thompson Enamel for Copper, Silver, Gold, Iron and Steel. This enamel is "medium fusing" and should be fired at 1400 to 1500 degrees F. for approximately 2 to 4 minutes. All Enamel is pre-1990, 80 mesh and lead bearing.
Due to the quality this enamel is to be used as counter enamel only.
 "124 Black Medium Fusing (counter only) (op)")