The chemistry for any etching setup is important, and in recent years the entire community has moved from ferric chloride to copper chloride for a very good reason: you can recharge copper ...

The standard go-to solution is ferric chloride. It isn’t too tricky to ... but it isn’t like premade etching solution is that expensive either. However, sometimes the commercial chemicals ...

The most common etching systems are based on alkaline ammonia and cupric chloride. Other systems include peroxide-sulfuric acid, persulfates, and ferric chloride. Process steps include resist ...