photosensitive etched circit boards

SCHRAMMR@wlsvax.wvnet.edu
Tue, 23 Aug 1994 22:13:24 -0400 (EDT)

I did some work with photosensitive etched circuit boards when they first came out many years ago. You do not use a negative, rather a positive which you can make by projection of a negative onto ortho lith film. Look for boards without a
pattern in the plastic. I polished by finished boards with metal polish and sprayed them with plastic varnish.