Homebrew_PCBs

That is agood idea, Stefan. I have to try it. Mike

--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:

>
> > Removal of the residue is a problem. I don't think a mechanical
> > contraption is a solution nor is a toothbrush.
>
> A foam-rubber piece and hard rubbing is a very fast approach.
>
> > I rather think that there is some kind of enzyme (septic tanks or
> > used to be a laundry powder with enzymes) that would consume

paper.

>
> There is a similar ting: polishing with abrasive kitchen cleaner.
> polish the top toner layer away with the paper residue.
> I use paper that leaves a lot of residue and still make very

professional

> looking
> black component legend with it. The polishing is some work but a

small

> tool does the trick.
> Use proxxon (or other brand) minidrill and a polishing tool to do

the hard

> work for you.
> (the felt polishing tools didn't work well for me so i mounted a

small rag

> over a plastic
> brush tool).
>
>
> > What about sticking the PCB somwhat cleaned out into the etchant

in

> > hopes that it will burn off the paper traces faster than copper

and

> > then go onto copper etching?
>
> tried that, doesn't work. if you have paper over the holes they get

dull

> red but
> not etched. (well, probably if you leave it long enough, but then

you have

> undercutting)
> maybe in a spray etcher.
>
> ST