Have you tried using the screen cleaner solvent that's specifically made for removing the photo emulsion from silkscreens? I have no idea what chemicals are in it. If it can remove cured emulsion from a screen, it should certainly work on a PCB. Regards, Bob --- In Homebrew_PCBs@yahoogroups.com, "hjf2k2" <drgenio@h...> wrote: <snip> > > But, the expired emulsion leaves a nasty residue, as if it's still > stuck to copper. No problem. Fine steel wool makes it go away. Even > pushing (relatively) hard to the thin tracks, the artwork stays. > > I'm really happy with the results.
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Re: cheap photo etching strikes back
2005-09-26 by Bob_xyz