Cupric (Copper) nitrate, Cu(NO3)2, is an inorganic compound that forms a blue crystalline solid.
Simple Patina Solution Mixtures: Cupric Nitrate - 250g-500g per 1 gal distilled water.
Patina Recipe: BASIC GREEN (Semi-transparent finish; Hot process): - Cupric Nitrate (1 tsp.) - Clean, potable water (1 pint) Note: A fresh mixture is needed for each coloring.