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  1. #41
    BetterSense's Avatar
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    I solved all my photoflo problems recently. I always had the hardest time getting a dilution that seemed to do anything, and didn't leave (fairly benign) marks on my film occasionally. I'm not sure if it's because I use 18 megaohm ultrapure water or what, but the stuff foams too and little bubbles get caught in the sprocket holes. I think I finally have the optimum dilution nailed down. I don't have any problems and get perfectly clean negatives at 0% photoflo, by volume. My bottle should last a long time this way too.
    f/22 and be there.

  2. #42
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    Bubbles form in sprocket holes and elsewhere and they burst and vanish as the film dries. This is normal.

    PE

  3. #43

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    Check the archives: http://www.apug.org/forums/archive/i...p/t-16378.html the formula listed seems to work as Photo-Flo, or at least I can't tell the difference.

    Paul

  4. #44
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    Quote Originally Posted by MattKing View Post
    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.
    I have not used hypo clearing agents yet. I do have some so I'll add that to my process.

    I think I'll bump my wash to ten fill and dump cycles over ten minutes.

    Thanks Matt

    Mark
    Mark Barendt, Beaverton, OR

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

  5. #45

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    Photo-Flo dilution & nasty scum

    I'm a photography teacher and for years I've used 5 gallon tanks for the stock solutions for all the classroom chemicals. I've become used to checking the state of my stock photo-Flo regularly, because it tends to develop scummy bits floating in it that will dry very permanently on the negs. This been the case for years now. Not a big problem, but no one else seems to have this issue. Any thoughts why? [note: this is a high school photo lab, and the kids could be putting ANYTHING into the wrong tanks, but being teenagers, they certainly can't have been doing it consistently for several years...]

    Also, in a workshop I took with John Sexton several years ago, he told us that 1:600 is really the correct dilution for Photo-Flo, and that he had this from a source at Kodak. Makes it last even longer....

  6. #46
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    There are 3 Photo Flo formulas out there. Photo Flo 200, Photo Flo 600 and Photo Flo 1200. This numeric sequence relates to the dilution used in making up a working solution. The 600 and 1200 are made with Ethylene Glycol which is more toxic than the Propylene Glycol used in 200 and the latter is therefore preferred for consumer use.

    In open tanks or tanks with floating lids, the water can evaporate and leave scum at the edges just as you get crud from evaporation of developer or fixer. The difference is that this scum is a goo. Scrape it off with a flat object and then skim it out of the solution with a coffee filter. This should work. But, Photo Flo can develop bacterial and fungal growths and that cannot be dismissed in your case. If it is a fungal or bacterial growth, the solution has gone bad and should be discarded.

    PE

  7. #47
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    Photo-flo is glorified dish soap. Technically, you could just use soap and distilled water.
    I will NEVER stop developing...

  8. #48
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    Quote Originally Posted by markbarendt View Post
    I have not used hypo clearing agents yet. I do have some so I'll add that to my process.

    I think I'll bump my wash to ten fill and dump cycles over ten minutes.

    Thanks Matt

    Mark
    This fixed the issue completely.
    Mark Barendt, Beaverton, OR

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

  9. #49
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    Quote Originally Posted by Stock Dektol View Post
    Photo-flo is glorified dish soap. Technically, you could just use soap and distilled water.
    No, it is not! If you read this thread you would learn about the subject and find that the dyes and scents in dish soap can harm your film.

    But, good luck anyhow.

    PE

  10. #50
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    Quote Originally Posted by Stock Dektol View Post
    Photo-flo is glorified dish soap. Technically, you could just use soap and distilled water.
    Nope. The post just above yours said ethylene glycol and propylene glycol. That isn't soap. Look it up. More like antifreeze, or cake mix, or p**** whip.

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