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

Russell,

Thanks for the help.

Rick

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By aerating the ferric chloride (possibly just with bubble etching like i
do), it becomes copper chloride etchant and lasts years. Start off with 1:1
dilution with water. Add a bit (like 5%) HCl acid every few months. Keep
covered when not in use. Disposal is nothing more than flushing money away.