I'd like to hear some of the details about your electro etching process. We considered this many years ago, but could never get it to work to the degree required. Using a secondary etch process in a production process at the time was not economically feasible as you would have to construct a completely new production line costing many $$$ as compared to the conveyorized spray systems then in use. [Non-text portions of this message have been removed]
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Re: [Homebrew_PCBs] Electro-Etching
2004-11-05 by Earl T. Hackett, Jr.