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PCB Etching Solution - Cupric Chloride

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Step 7: Wiring the Electrodes

Picture of Wiring the Electrodes
05B - Plates in Acid.jpg
05C - Hydrogen Peroxide.jpg
05D - Color Change & Scrap.jpg
1. The smaller, corroding electrode goes through a red wire to the positive (+) terminal of the power source.
2. The larger, accumulating electrode goes through a white wire to the negative (-) terminal of the power source.
3. Immerse the electrodes into the muriatic acid used for cleaning as pictured.
4. Add hydrogen peroxide (3% pharmacy type) to the muriatic acid, turning it green.

Optional Steps:

5. Add scrap copper to the muriatic acid.
6. Block the jar top with a wad of dry paper towels to minimize acid release due to electrode bubbling.
 
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