#395 At the foundry: Patina, the power of color, con't . . .

Please start this series about patina with post #391, Feb. 13

Cupric nitrate and ferric nitrate are both applied with heat.  As more heat is used during the application of ferric nitrate, the color changes from a pale yellow to a deep, rusty red.

Below, ferric nitrate is applied over cupric nitrate which produces a  

greenish patina due to the blue  undercoat of cupric nitrate . . .

as additional heat is applied and more ferric nitrate is stippled on, the patina darkens and vibrance is enhanced.

Bison Fragment II
20"H 25"W 8"D
Copyright Sandy Scott