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

Hello,

This is a plea for help!
I am on my 5th trial with this and while each trial improves somewhat
in end quality, and certainly in the process, (no longer spilling
solvent all over the basement), I still have yet to produce a board
that I thought could be etched.

The traces are very weak to washed out to non existant. At first I
thought I was under exposing now I suspect I am over exposing or just
not getting a good build up of the resist on the board to start with.

I am looking for someone familiar with this method to bounce a few
emails with so that I can get it right.

At this point I am:
In a 60watt bug light environment (Problem?)
Coating the boards with makeup swab rather then spraying, much nicer
coat and no smears, nice and shiny, dust free mostly.

Drying over night in a sealed shoebox, inside another box

Using tracing paper as negative nice black laser print (Reported to
work in many places)

Exposing with a 250watt photoflood for various times and developing
following supplier instructions with the recommended developer.

Exposure times have been, 22, 10, 5 with a couple of retrials in
between, no, luck. Any help would be greatly appreciated.

Thanks,
Eric