Compounds with metal cations (positively charged ... in the presence of chloride ions from hydrochloric acid effectively resets the etching solution, restoring the cupric chloride and making ...

The acid and peroxide will fume, and that can corrode metal. [w_k_fay] read ... Speaking of cost, some of these solutions are cheap, but it isn’t like premade etching solution is that expensive ...

"The thickness of the metal layer, the initial state of mechanical stress of the sample, and the composition of the etching solution all play a role in determining the type of pattern that ...