Whenever I search for the raw technical details of Warhol's process I find very little information. The most I've ever been able to find was this:
Any of you have some light to shed on a few of these questions?In August 62 I started doing silkscreens. I wanted something stronger that gave more of an assembly line effect. With silkscreening you pick a photograph, blow it up, transfer it in glue onto silk, and then roll ink across it so the ink goes through the silk but not through the glue. That way you get the same image, slightly different each time. It was all so simple quick and chancy. I was thrilled with it. When Marilyn Monroe happened to die that month, I got the idea to make screens of her beautiful face the first Marilyns.
What method did he use for photo exposure? What did he use for positives, lith film using reversal process? That would be some damn big film if so. Could he have produced his screens with projection?
What kind of exposure set up? I know he took his own source pictures with models.
What emulsion did he coat his screen with? He refers to it as "glue". How many coats did he use?
What kind/count mesh did he use? Squeegee?
I read he printed on the floor, but did he ever use a clamp system?
Did he print on stretched canvas or stretch after printing?
How were his frames stretched and with what tension? Stapled, glued?
I realize some of the answers may be lost, but I'm still incredible curious. I know a lot of his work was done by assistants later on.