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Articles and Videos by Gail Nelson:
Metalsmiths and enamelists have used ferric chloride for several years as a safer alternative to nitric acid for copper and brass etching purposes. Although it is generally thought of as etching with an acid, ferric chloride is actually a salt. Etching and resist removal solutions recently developed by Friedhard Kiekeben have greatly improved the process and final product, as well as safety, cost and simplicity.
This article summarizes my experiences with these exciting methods for etching metal and removing resists. I have also included my own observations as well as an overview of the etching process, resists, equipment and materials necessary.