On May 6, 11:54, technoid_at_cheta.net wrote:
> In order to make fine traces with Nickel Print conductive paint I used
> paper matches. Yeah, the kind you light your Camels with.
>
> Cut the base of the match off at a 45' angle. This gives you a nice
point
> and the paper holds enough paint to make a halfway decent brush. They
are
> only good for a trace or two so have a full pack handy.
I find a good-quality No.2 artist's brush (not smaller) will have a very
fine point and do an excellent job.
> I've used tape to cover the traces but when you peel the tape up you peel
> the traces with it. The scalpel approach works pretty well but leaves
> ugly traces and is hard to do once the paint is dry. I use the matches
> and the scalpel together in real-time so I'm scraping at wet paint.
I perhaps have an advantage in that I learnt to retouch photographic
negatives (and prints) with a scalpel and retouching brush. PCB traces are
easy by comparision. You don't try to scratch through in one go; rather
try to gradually pare down to the substrate.
> >Ugh, that is exact same thing what I did many times in my retired
> >compaq LTE 386s/20 on one of two keyboard cable. Is there a better
> >quality kind than this conductive paint I got? Then name one!
I don't know what kind you've got :-) The kind I use is silver-loaded, and
seems to stick well, and work well. It's made in the U.K.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
Received on Sat May 06 2000 - 18:37:36 BST