Color: 1760 Iris Purple , Opaque 80 Mesh Enamel with Firing Temperature Range of 1400-1500 Degrees Fahrenheit For Use with Copper, Gold, Silver, Steel or Metal Clay Made Lead-Free and Acid Resistant in the USA Enamel Powder Only. Pictures have been taken on copper blanks for demonstrative purposes only. Thompson Enamel is the finest quality enamel available on the market and is carefully formulated in the United States and designed to perform consistently. 1760 Iris Purple Thompson Opaque Enamel - 80 Mesh Medium Temperature Medium Expansion Enamel for Copper, Gold, Silver, Low Carbon Steel & Metal Clay. Normal firing temperature range is 1400-1500 degrees fahrenheit. Coefficient of Expansion Range is 258-360 cubic expansion. Made lead-free in the USA. Available in 1 Ounce Jar, 2 Ounce Jar, 8 Ounce Jar, & 5LB Container. - 8 Ounce