I did a post on using Scotch 33+ electrical tape for doing exactly
that, covering the second side of a double-sided board. It must have
been in the diptr forum. It's thin, pliable, and won't cause leakage
where the tape overlaps if you run you fingernail or a pencil down the
seam.
For large defect areas on the printed side, I use fingernail polish.
I suspect one could etch for 6 months and that lacquer-based substance
wouldn't deteriorate! It cleans up with acetone, which ∗is∗ still
used in fingernail polish remover.
Cheers,
Ted
For --- In
Homebrew_PCBs@yahoogroups.com, "soffee83" <soffee83@...> wrote:
>
> --- In Homebrew_PCBs@yahoogroups.com, "kilocycles" <kilocycles@>
> wrote:when I etched, the Sharpie areas etched away much more than the
> >toner-covered areas (can't
>
> I get that a bit as well. I'm usually extra careful now to let the wet
> Sharpie crap dry thoroughly, and then redraw over top of it once or
> twice, until it's nice and "dense" looking. I sometimes use a regular
> "fat-tipped" marker for wide stuff too.
>
> I was wondering if there were any easy techniques for masking really
> large areas, like the whole back side, for instance? Seems like it
> might help for doing double-sided stuff, if you could hit it one at a
> time, while covering the other side with tape,etc. I hate trying to
> protect the delicate toner work on one side during all the pressing
> and heating for the second one.
>
> -George
>