Homebrew PCBs

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