Chemical Etchants

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Ferric Chloride

Ammonium Persulfate

Sodium Persulfate

More environmentally friendly than ferric chloride. Can monitor the etching as initially clear new etchant solution turns blue from the copper ions.

Disposal procedures

  • Kepro Circuit Systems Removal of Copper and Persulfate from Spent Sodium Persulfate Etchant by Precipitation

External Links