Then I mix up a photo sensitive solution from platinum and palladium salts and paint it on watercolor paper. Then I put the large negative on the paper and sandwich it between sheets of glass and expose it to the sun. Then I put it in solution that develops an image of the negative and then I put it in baths of Hydrochloric Acid to fix it.
Just tell everyone that you a a research chemist!
"People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.