-I use a positive photo-resist. Pre-coated PC boards from GC Electronics.
Sometimes I use an ALPS printer to make clear film positive... good to prototype with. To make production boards boards over and over I take the art file to a printer service that has a image setter onto clear film.
Don Matthys
dba Don's Light and Magic
www.dlmparts.com
don@...John Adams wrote that the Fourth of July "...ought to be celebrated by pomp and parade, with shows, games, sports, guns, bells, bonfires, and illuminations from one end of this continent to the other..."