Purpose: According to The Real Elliot's instructable titled Stop using Ferric Chloride etchant! (A better etching solution.), cupric chloride + hydrochloric acid is an excellent PCB (printed circuit ...
1. Since the copper is softer, flatten it with pliers.
2. Cut the copper into two electrodes, approximately 2.5" x 1" and 2.5" x 2".
3. Drill a hole into the top of each electrode.
4. Place leftover scraps aside.