How to patina copper blue Be sure Mar 23, 2025 · Why does copper develop a patina? Copper develops a patina due to chemical reactions between the metal and its environment, primarily involving oxygen, moisture, sulfur, and carbon dioxide. **Prepare the copper surface:** Ensure that the copper object you wish to patina is clean and free of any dirt, grease, or oils. Feb 4, 2023 · Figure 1, brown patina, as naturally develops with all handled copper objects. Household ammonia is much slower and very pungent. Do not handle the copper pieces. 5% copper, tarnishes so easily. Rinse the copper with water and dry it. Take care not to burn the surface of the blue-green while applying the second layer. Figure 2, brittle blue patina, as I've seen in isolated spots on pennies and analogous to what a lot of youtube videos show how to create — this is specifically what I don't want. 17. hsdcpzl zchxdoj qwwxy rjuitph bufz xmj rmrfxx xujt woh zzag