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  1. #21

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    It is amazing how much controversy urine brings to any conversation. In and of itself unless the donor is ill urine is sterile when it comes out. it contains lots of nitrogen compounds, and a whole bunch of other stuff. There seems to be a use for it in all sorts of things. I remember in the Army when they taught us about heat stroke the need to douse the patient in water, if none were available.... well you better believe everyone made sure to drink their water that summer

    Of course it all depends on what you have eaten and what you have drunk and what medications you are using and what degree of hydration you have...

  2. #22
    AgX
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    I'm surprised too by all that commotion. I'm curious about the chemical aspects of it.

    (By the way, here urine as means of medical therapy is being discussed for quite a time; the most famous book on it is now in its 38th edition.)

  3. #23

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    Advantages:

    1. Perfect for bathroom darkrooms!

    2. And I thought HC-110 was cheap!

    3. You can now tray develop in bed pans!

    Disadvantages:

    1. Drugs that show up in urine could alter N+1 times

    2. Side effects include waking up in the middle of the night with sudden urge to develop film

    3. Viagra use could possibly turn negatives to instant cyanotypes

    4. Dilutions would have to be figured using an Excel spreadsheet inputting all liquids consumed within the last 24-48 hours, i.e. Kodak's unofficial Dilution P

  4. #24

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    Quote Originally Posted by AgX View Post
    I'm surprised too by all that commotion. I'm curious about the chemical aspects of it.
    I guess the important part here is UREA. It's said to soften gelatin and might increase penetration by the developer to counter effects from tanning development.
    There is a well known developer used for ultra-fine grain emulsions, called CW-C2:

    catechol....................10g
    ascorbic acid............10g
    sodium sulfite............5g
    urea............................5g
    sodium carbonate....50g
    Distilled water............1L

  5. #25

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    There is also catechol in urine

  6. #26

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    I knew there was a good use for yellow snow!

  7. #27

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    That might help keep it closer to 68 degres

  8. #28

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    One of my professors in university used to say (quoting one of HIS professors), "You can develop film in most anything, including Scotch, but it's a dreadful waste of good Scotch!"

  9. #29
    CBG
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    Now some damn person is going to take offense that I just flush mine down the toilet with no environmental pre-treatment.

    Uggg,

    C

  10. #30
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    Quote Originally Posted by CBG View Post
    Now some damn person is going to take offense that I just flush mine down the toilet with no environmental pre-treatment.

    Uggg,

    C
    I believe my body when it tells me that anything that comes out of that end is meant to keep on going, not to return any time soon. One can argue that there is a pretty good probability that at least one of the molecules of my body was once part of a stone-age man's urine. Sterility is not a guarantee of potability, nor is the opposite a necessary prohibition

    There is a book, "Caveman Chemistry", that describes in entertaining manner many primitive processes . One of them uses urine in the formation of dye. I have a developer formula that I jokingly call Cat-P-Tea. It has catechol that we also find in urine and the Pyrocat series.
    Gadget Gainer

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