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How do I create a black patina on iron?
I have been working on an iron bench. I have just removed all of the red rust and now it is bright and silver. What chemicals or formulas should I use to give it a black patina?
home artist - Carrollton, Texas, US
You can use 20 gm tannic acid/2o gm tartaric acid/ 1 lit water solution. You can paint it on your object(or spray or immerse object in solution). Instead tartaric acid you can use phosphoric acid(15 gm). Wax, oil or lacquer finished object, Good luck!
- Zagreb, Croatia
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