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  1. #1
    eli griggs's Avatar
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    Agfa-Ansco-GAF 81 shelf-life?

    I want to try this lith developer but I'm not sure if I an mix up a batch and store it a few days ahead of a session so I'm asking here; what is the shelf life of this developer in glass, unused?

    Any other info or tips using it are welcomed as well.

    Eli

  2. #2
    Ian Grant's Avatar
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    The Agfa Ansco manual says the Agfa 81 "Reprolith" developer solution has "excellent keeping qualities". Looking at the formula there's no reason to doubt this. It was a commercially available packaged developer.

    Ian

  3. #3
    CBG
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    I have two formulas for Agfa / Ansco / whatever ... 81 that I have found on the internet. Could anyone with the manufacturer's formularys sort out whether one or both are good or bogus?

    ----------------
    Agfa 81 Repro developer
    Water 125 F 750.0 ml
    Metol 7.5 g
    Sodium Sulfite anhyd 40 g
    Hydroquinone 3.5 g
    Sodium Carbonate 30 g
    Potassium Bromide 3 g
    Water to 1 L
    -----------------
    Ansco 81 repro lith developer
    Water 125 F 750.0 ml
    Hydroquinone 35.0 grams
    Sodium Sulfite, desicc 55.0 grams
    Sodium Carbonate, mono 80.0 grams
    Citric Acid 5.5 grams
    Potassium Bromide 10.0 grams
    Cold water to 1.0 liter
    -----------------

    Thanks,

    C

  4. #4
    eli griggs's Avatar
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    From a comment in the thread, Agfa-Ansco-GAF 81, within the paper developers formulas here, found under the "Articles" section, I believe the first one you give may be the German compounding.

    How this performs as compared to the other, I have no idea so let's hope an experienced member can shed more light.

    Eli

  5. #5
    Ian Grant's Avatar
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    The correct Agfa Ansco Reprolith formula is:

    Agfa 81 Repro Lith developer


    Hydroquinone 35.0 g
    Sodium Sulphite, anhyd 55.0 g
    Sodium Carbonate, mono 80.0 g or 69.6 g anhyd
    Citric Acid 5.5 g
    Potassium Bromide 10.0 g
    Water to 1.0 litre


    The other formula is the German Agfa/Orwo 81 developer which at first glance looks to be a soft working possibly warm tone print developer

  6. #6
    eli griggs's Avatar
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    Thanks for clearing that up Ian.

    Do you have any additional thoughts to share on mixing, storing or using this lith formula?

    Eli

  7. #7
    Ian Grant's Avatar
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    Can't help you I'm afraid. This is not a type of formula I'd use, I preferred using a modified version of D85 but I was using it for developing Graphics films.

    Ian

  8. #8
    CBG
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    Ian,

    Thanks so much for the clarification! I am always surprised at how many variants of a formula seep out on the net. I have tried to corral them all. or as many as reasonably possible, now some many many hundreds, and then look them over for obvious contradictions and error. Regardless, I find myself with an untidy rabble of formulas with multiple versions all claiming to be the one true concoction, and quite a few obviously incomplete mystery formulas.

    C

  9. #9
    sun of sand's Avatar
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    Never been able to find anything on "Reprodol" or "Paralith"
    One is a 1 solution the other is a 2 solution

    Maybe the Reprodol wasn't quite a lith developer
    pretty sure both are Agfa/Ansco which means every formula has 3 or more names which means their true identity is probably lost forever unless I buy every pamphlet I find

    But Perhaps Ian has those pamphlets for me? 1940-1950 era

  10. #10
    Ian Grant's Avatar
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    Yes I'd agree that Agfa Ansco 81 is not a true lith dev but rather a very high contrast developer for a specific film "Repro lith"

    I always used a variation Kodak D85b which is the Paraformaldehyde lith dev, and very similar to theformula of Agfa Ansco 79/79b "Paralith"

    AN 79b

    Part A
    Sodium Sulphite (anhyd) 1 g
    Paraformaldehyde 30 g
    Potassium Metabisulphite 10.5 g
    Water to 1 litre

    Part B
    Sodium Sulphite 120 g
    Boric acid 30 g
    Hydroquinone 90 g
    Potassium Bromide 6 g
    Water to 3 litres

    Agfa Ansco 79b ids the two part version of AN 79.

    Use 1 part A + 3 parts B


    I substituted Sodium Hydroxide and Formaldehyde solution in place of Paraformaldehyde and we used this variation in our graphics studio/darkroom for over 19 years. Back in the 70's I found I couldn't buy Paraformaldehyde, in fact my chemical suppliers didn't know what it was. Variation formula:

    D85 Variation


    Part A
    Sodium Sulphite (anhyd) 120 g
    Formaldehyde (Formalin soln) 30 ml
    Potassium Metabisulphite 10.5 g
    Sodium Sulphite 120 g
    Boric acid 30 g
    Hydroquinone 90 g
    Potassium Bromide 6.3 g
    Water to 4 litres

    Part B
    Sodium Hydroxide 200 g
    Water to 1 litre

    To use 4 parts A + 1 part B

    Hope that helps

    Ian

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