This is Cuprous Oxide and it must be precipitated or it is "fogged". The precipitation of a Cuprous salt from water with a peptizing agent forms a non-foggy Cuprous Oxide crystal that can be coated and developed.
Sulfuric Acid is not excreted by the human body in any way, nor is it normally produced!
What is peptizing agent of this material ?
It is not gelatin. I used a stable polymer but forget the structure. Last time I did this work was in the 70s. Gelatin is used later on for coating, but not for PPTN. The gelatin is destroyed by the acid and base used.
That was not pure urine:
"I heard that you can develop film in piss I exposed some Rollei 80s at iso6 and then used my concentraded morning urine at 30C with some Vitimen C crushed up in it."
Urine was probably (?) just acting as the alkali....
I think I watched at BBC , one woman german doctor drinked the patients urine and said you are healthy :) You might see the face of the reporter.
What next? I can develop film with pea soup, I just have to add some Rodinal to it! O M G :w00t: