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[[Cupric_chloride_etchant|Air-regenerated etchant]] | [[Cupric_chloride_etchant|Air-regenerated etchant]] | ||
[http://www.nontoxicprint.com/etchcopperandbrass.htm Edinburgh etch] | |||
Another guide can be found here : [http://www.electricstuff.co.uk/pcbs.html Mike's electric stuff] | Another guide can be found here : [http://www.electricstuff.co.uk/pcbs.html Mike's electric stuff] |