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  1. #31

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    Years ago there were quick dry agents that were nothing more than denatured alcohol. I also used 90% isopropyl alcohol.

    If you try this experiment with a film clip. film has changed in the past forty years.

  2. #32
    jnanian's Avatar
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    don, do you think vodka could be used for this ?
    i'm thinking popov ( read cheap rot gut ) might have an 11th use

  3. #33
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    Guys;

    Alcohol was used as a DRYING AGENT not a WETTING AGENT. These two are unrelated functions.

    You treat with a wetting agent or surfactant to prevent water spots from minerals and contaminants in water. You use alcohol to promote rapid drying.

    There is some overlap in function, but they are not identical.

    PE

  4. #34
    jnanian's Avatar
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    Quote Originally Posted by Photo Engineer View Post
    Guys;

    Alcohol was used as a DRYING AGENT not a WETTING AGENT. These two are unrelated functions.

    You treat with a wetting agent or surfactant to prevent water spots from minerals and contaminants in water. You use alcohol to promote rapid drying.

    There is some overlap in function, but they are not identical.

    PE
    thanks PE

    i guess it isn't another mysterious use afterall!

  5. #35
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    After reading all of this I'd better get some real Photoflo. The 1st few rolls I've done since getting back into the darkroom smell lemony fresh because of the dish soap. :o

  6. #36

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    Brofkand,
    Generally I use it one-shot, so I dump what I've used, that way there is no accumulation of any sort of contamination in the jug. Once the jug is empty it goes in the plastics recycle bin, and I start a new one.
    As you say, it helps the film dry a bit faster, but the reason for using it is to avoid water spots. So far as I know it does nothing for the longevity. If water spots aren't a problem, there is no particular need to use it, faster drying does help for avoiding dust problems though.

  7. #37
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    I've been mixing up Photoflo one shot, using 1.25 ml in distilled water for a 250ml batch, I hang the long rolls to dry and 8 out of 10 are getting slimy drips at the bottom. What am I doing wrong?
    Mark Barendt, Beaverton, OR

    "We do not see things the way they are. We see things the way we are." Anaïs Nin

  8. #38

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    Mark: I'd guess you're not rinsing fully before you use photo-flo. I've noticed fix can feel kinda slimy.

    The photo-flo is picking up the residual fix and it's dripping off.

    That's just a guess. Someone else will probably know for sure.

  9. #39
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    Quote Originally Posted by brofkand View Post
    Mark: I'd guess you're not rinsing fully before you use photo-flo. I've noticed fix can feel kinda slimy.

    The photo-flo is picking up the residual fix and it's dripping off.

    That's just a guess. Someone else will probably know for sure.
    I'll try washing more.

    Right now I'm doing 5-rinses; 1-30 second, 2-60 second, 1-2-min, and a final 15 second rinse.
    Mark Barendt, Beaverton, OR

    "We do not see things the way they are. We see things the way we are." Anaïs Nin

  10. #40
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    Mark:

    Are you using Hypo Clearing Agent or something similar before your wash?

    If not, this is a very short wash sequence.

    Matt

    P.S. Actually, it is somewhat short even if you are using Hypo Clearing Agent.

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