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  1. #11
    holmburgers's Avatar
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    Quote Originally Posted by Mustafa Umut Sarac View Post
    Sulfuric acid is pee and forgers pee on to copper antiques copies underground to simulate the patina of aged copper or bronze
    Are you suggesting that we could develop out pictures by peeing on them!? This would really appeal to those interested in Caffenol and other DIY chemicals....


  2. #12
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    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!

    PE

  3. #13
    Mustafa Umut Sarac's Avatar
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  4. #14
    Mustafa Umut Sarac's Avatar
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    Ron ,

    What is peptizing agent of this material ?

    Umut

  5. #15
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    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.

    Sorry.

    PE

  6. #16

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    Quote Originally Posted by holmburgers View Post
    Are you suggesting that we could develop out pictures by peeing on them!? This would really appeal to those interested in Caffenol and other DIY chemicals....

    http://www.flickr.com/groups/ishootf...7624422343872/
    "Panic not my child, the Great Yellow Father has your hand"--Larry Dressler

  7. #17

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    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....

  8. #18
    Mustafa Umut Sarac's Avatar
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    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.

  9. #19
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    What next? I can develop film with pea soup, I just have to add some Rodinal to it! O M G

  10. #20

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    Quote Originally Posted by hrst View Post
    develop film with pea soup
    To paraphrase Hesse:

    Pea Soup Processing
    Entrance not for Everybody
    For Exorcists Only !

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