Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I have been using "the" toner transfer method for about 2 years and
produced some very good PCBs.
Until a week ago!
I had problems making the toner sticking to the copper.

After a lot of frustration I tracked the problem to the kind of
liquid soap I used with Scotchbright pads to clean the copper.

It turned out that my wife changed the brand of liquid soap to
one "that is kind to your skin". So it may be - but it leaves an
invisible (oily?) film on the copper which is virtually undetectable.

Using my old liquid soap brand cured the problem.

I feel pretty silly now, but then again 20:20 hind sight always leads
to highly accurate observations.

The moral of the story is of course - check the cleaning agent and
don't let your wife decide the brand.

Frank