Letter 29082

Searching for non-ammonia based verdigris patina formula [Vermont] 

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I am looking for a safe formula for applying a verdigris patina to the solder lines and zinc framing on an assembled stained glass panel. I have seen many formulas calling for the use of ammonia solutions, which I cannot use for health reasons. Any information would be greatly appreciated.

Justin Hannington
stained glass artist - Burlington, Vermont, USA

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