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Thread: Longevity of stock TF-5 Archival Rapid Fix?

  1. #11

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    Re: Longevity of stock TF-5 Archival Rapid Fix?

    Quote Originally Posted by esearing View Post
    I use TF5 only for film with pyrocatM because it does not reduce the stain color - For paper I have always used small bottles of Ilford rapid fix because its what I can buy locally. I did try Wolfgang Moersch's Lobotype process and found that TF5 fixer gave me a grayer tone than TF4 or Hypo alone. For Salt prints TF4.

    I did a residual test after the bottle had been open about 18 months. Maybe will try again next print session.
    I don't know about Pyrocat, but using Ilford Rapid Fixer or Hypam with PMK negatives has no influence on the stain (despite the PF instruction sheet - I guess Michael that you're correct about the unreliability of the PF instructions...). I've use TF-4 with PMK negs as well as Kodak and Ilford rapid fixers and saw no difference in stain formation.

    That's not to say you shouldn't use TF-5, just that, maybe, the notion that more acidic fixers affect Pyrocat stain is false.

    Best,

    Doremus

  2. #12

    Re: Longevity of stock TF-5 Archival Rapid Fix?

    Does anyway have or know where to locate the formula for TF4 & TF5?

    My inital earches have come up empty handed.

    Thanks very much.

  3. #13

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    Re: Longevity of stock TF-5 Archival Rapid Fix?

    They are proprietary so you will not find them. They are not magical - essentially ammonium thiosulfate-based, like any standard rapid fixer, but with some additional compounds not disclosed. TF-4 is alkaline. TF-5 is neutral (preferred) and was formulated with the assistance of Ron Mowrey (former Kodak emulsion engineer) who incidentally designed various novel fixer formulas of his own (one of which can be home-mixed), although TF-5 is more conventional. Kodak's Flexicolor fixer is similar.

    If you want to home-mix a neutral rapid fix, it is quite trivial. Ryuji Suzuki's formula is as good as anything out there:

    500ml water
    Ammonium thiosulfate (120g or 200ml of the more commonly available ~60% solution)
    15g sodium sulfite (anhydrous)
    5g sodium metabisulfite
    +water to make 1l working solution target pH approx. 7

    Reducing the metabisulfite/bisulfite will increase pH (ie makes it alkaline).



    Quote Originally Posted by motocbiker View Post
    Does anyway have or know where to locate the formula for TF4 & TF5?

    My inital earches have come up empty handed.

    Thanks very much.

  4. #14
    Tin Can's Avatar
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    Re: Longevity of stock TF-5 Archival Rapid Fix?

    I find TF5 mixed as recomened lasts very long

    USE known distilled water

    So long it seems to not diminish

    It's MAGIC!

    I buy 4 gallons at a time as shipping is best at that weight

    If you have not tried it...

    What do you know?
    Tin Can

  5. #15

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    Re: Longevity of stock TF-5 Archival Rapid Fix?

    It lasts long mostly because thiosulfate is much slower to decompose under a neutral/alkaline condition than an acidic one. Or it is because of magic. Whichever makes one feel better.

  6. #16
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    Re: Longevity of stock TF-5 Archival Rapid Fix?

    So you have not tried itů


    Quote Originally Posted by Michael R View Post
    It lasts long mostly because thiosulfate is much slower to decompose under a neutral/alkaline condition than an acidic one. Or it is because of magic. Whichever makes one feel better.
    Tin Can

  7. #17

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    Re: Longevity of stock TF-5 Archival Rapid Fix?

    Quote Originally Posted by motocbiker View Post
    Does anyway have or know where to locate the formula for TF4 & TF5?

    My inital earches have come up empty handed.

    Thanks very much.
    As stated, the recipe is proprietary to Photographer's Formulary, so you won't find it. The Ryuji Suzuki's formula is a good alternative with very similar traits.

  8. #18

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    Re: Longevity of stock TF-5 Archival Rapid Fix?

    Quote Originally Posted by Tin Can View Post
    So you have not tried itů
    LOL I did try a bottle of it a long time ago. It worked fine but nothing magical happened

    I haven't looked at the prices in a while but at the time it was expensive compared with Ilford Rapid Fixer, so I went back to the Ilford product. TF-5 might make more sense for someone who needs a fixer to keep a longer time, but it wasn't worth it for me. Neutral fixers like TF-5 also have less odour, which is nice, but there are other ~neutral rapid fixers just as good. Sprint is an example.

    It's too bad Ron never got to publish or commercialize the last iterations of his Superfixers (I think VIII was the most recent - it would fix in seconds, wash out of FB in less than a minute, and was apparently less nasty than Superfix I).

  9. #19

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    Re: Longevity of stock TF-5 Archival Rapid Fix?

    Quote Originally Posted by Michael R View Post
    ...TF-5 is neutral (preferred)...
    Preferred why?

  10. #20
    Tin Can's Avatar
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    Re: Longevity of stock TF-5 Archival Rapid Fix?

    I consider all analog photography Alchemy

    AKA MAGIC

    THAT IS EXACTLY HOW I SAW IT AGE 7

    long ago with minox
    Tin Can

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