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

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [Homebrew_PCBs] Re: PCB cleaning method

From: lists <stuart.winsor.lists@...>
Date: 2004-11-04

In article <418AA267.80908@...>,
RMustakos <rmustakos@...> wrote:

> After much thinking for an old brain, I remember that we used something
> like this (sometimes instead of Brasso) to clean the brass for our
> uniforms. I guess that begs the question if whether anyone has tried
> Brasso for cleaning copper clad? I know it gets brass down to the bare
> metal pretty quickly. As I remember, so does the stuff like this we
> used to use, but I thinks the stuff on the pads left more of a film than
> the brasso, but was _much_ easier to use. Brasso required a little
> elbow grease, and this stuff just stripped the tarnish away, but like I
> said, left more of a film. Of course, this is 20+ year old data,
> scrounged out after 20 years from a less than reliable source (my brain,
> or what passes for it these days).
> Richard

Brasso, like all common metal cleaning products, contains a polish which
will leave a film on the copper. Whether this interferes with the etching
process, will depend on the precise chemistry used and the nature of the
polish. I would not reccomend it.

Stuart