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Step 5Etch the copper away.
Prepare a solution of 1 part Muriatic Acid, 2 parts hydrogen peroxide. I used 8 oz. Muriatic acid, 16 oz. hydrogen peroxide. Be very careful with this acid, it's a lot stronger than the photoresist developer. I suggest using a fan over the bucket so you don't breathe in any of the fumes. Wear gloves and goggles.
Add the PCB to the solution and shake the bucket carefully. The solution will start to turn green as the copper is being etched away. As soon as all the copper is etched away, remove it from the bucket. The copper will take about 2 minutes to be etched away completely.
Wash the PCB off in a bucket or use a hose.
Add the PCB to the solution and shake the bucket carefully. The solution will start to turn green as the copper is being etched away. As soon as all the copper is etched away, remove it from the bucket. The copper will take about 2 minutes to be etched away completely.
Wash the PCB off in a bucket or use a hose.
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