Can you tell me how I can learn more about the process your boss used?
He was a student at Clemson University, working under Sam Wang, who is still a fine arts professor there. My understanding of Sam is if you ask him what if, he will probably tell you to try it out, even if he knows what will happen.
Basically, you coat the screen with a photo sensitive material, sort of like coating paper for black and white print making. Then you expose the screen under an enlarger, which "fixes" the parts exposed to light, and you wash it off. He made his own emulsions with drugstore chemicals.
He would make posterized "separations" on Kodalith, and then make the prints. Sort of Warholish, but the process would be easiliy adaptable to any sort of separations, including 4 color process. Probably a book on Warhol's technique would tell you everything you need.
Obviously you need a black and white darkroom with a 4x5 enlarger and a big sink to get started.
Bob