Forgot to mention that the stuff my girlfriend donates is fingernail polish!! Sorry bout that :-) A fast drying enamel. Comes off easily with lacquer thinner. Just like the TonerTransfer. I usually use red cause, not only does she have many shades of red, but I like the color cause is stands out. Keep on Etching..... afn T --- In Homebrew_PCBs@yahoogroups.com, "TonyB" <tbarros@...> wrote: > > A fine tipped brush and signpainter's ink works fine also. U want a > paint that is not water soluable, and dries quickly. Sharpies are the > right type ink, but go on much too thin. When push comes to shove, I > just get my girlfriend to donate one of the many colors she doesn't > use anymore. I even use the internal brush!! The idea is to save the > copper. U can always scratch off the excess copper after the pcb is > etched. Etch on, Dudes! afn Tone > > --- In Homebrew_PCBs@yahoogroups.com, Gordon Couger > <gordon.couger@> wrote: > > > > Why not just a brush and a few coats of India Ink or paint. You can > > make a mask if you can't do it free hand. A good bush with long > bristles > > is easier to use than it looks. > > > > Gordon > > > > dl5012 wrote: > > > > > > Hi John, > > > > > > Don't bother trying the ultrafine point Sharpie markers. The ink > > > doesn't work as an etch resist... Same goes for the "huge" chisel > > > point industrial marker. I thought that tip would be good for going > > > over large copper fill areas... > > > > > > I've used the black fine point Sharpie as an etch resist for > > > decades. For narrow traces, I've used slots cut in transparencies > > > as templates. I use an eraser shield and a firm eraser to clean up > > > the edges. Eraser shields are surprisingly difficult to find these > > > days; drafting (drawing by hand) must be becoming a lost art. The > > > last batch I bought at a craft store; poor quality with sharp edges, > > > but better than nothing. In a pinch, you could use a transparency > > > with slots cut out. > > > > > > Another option is to use "Ruby" tape. This is a red transparent > > > tape they used to use this in the old days to layout PCB (and > > > integrated circuit layout) by hand. It works fine as long as you > > > don't have any "crossings" where etchant can get under the tape. > > > > > > Yet a third option is to locate some rub-on transfers. I have some > > > sheets that have traces and pad patterns (but haven't seen them for > > > decades...). > > > > > > Regards, > > > Dennis > > > > > > --- In Homebrew_PCBs@yahoogroups.com > > > <mailto:Homebrew_PCBs%40yahoogroups.com>, "Jan Kok" <jan.kok.5y@> > > > wrote: > > > > > > > > I believe there is an "ultrafine point" sharpie. > > > > > > > > I haven't tried it, but maybe you could cut two sides off a "fine > > > > point" sharpie with a razor blade, to get a very narrow tip. > > > > > > > > Cheers, > > > > - Jan > > > > > > > > > > > > >
Message
Re: PCB Touch up
2007-08-09 by TonyB
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