Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Normally you use a bubbler to agitate a small tank, and the pumps are not in the solution. Bubbling also regenerates the cupric chloride which is what is actually performing the etch. The HCl/Peroxide mix will quickly eat nylon but most other plastics don't seem to be bothered. Epoxy glue is attacked but slowly. If you're building your own tank, test the materials first.

Adam Seychell used to have a web page describing the process, but his site seems to be gone.I had to get it from the wayback machine. Jim Williams has duplicated Seychell's page at Etching with Air Regenerated Acid Cupric Chloride