I have some needs for more general purpose photo-lithography than just pre sensitized PC boards. I need to make masks for sputtering and evaporation in vacuum, and for selective electroplating and chemical engraving. I have been playing just a little with a PVA-ammonium dichromate mix, but not getting the world's greatest results -- could be I have the wrong molecular weight PVA - I got the stuff they sell to make "slime" for school children, as it was what I could find. I'm not hooked on making my own, though, I just haven't found a commercial product that I can get that also works.
So, HELP! Anyone have a better clue than I what is good for some of these tasks? Has to be something I can get in less than 55 gal drum lots.