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The main benefit of using Cupric Chloride etchant is that it does not need to be disposed. The solution can be regenerated by simply bubbling air through it and topping off with water when necessary. All the materials (from left to right): Container with etching solution, Cupric Chloride (CuCl2), Muriatic Acid (HCl), Measuring Cup
Ingredients: 1L water, 200g CuCl2, 100g HCl 37.5%

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