Still on Rollei ATP film

Discussion in 'Darkroom Developing and Printing' started by piterengel, Mar 23, 2008.

  1. piterengel

    piterengel Guest

    I start a new post about this film.

    I've tried my first roll, exposed at 25 ISO, taking pictures of
    mountain landscape, with few snow and clouds on sky.

    I've tried Delagi #8 developer, 15 mins at 20 degrees, exactly the
    same used with Kodak TP film. The result is a quite weak negative,
    completely different from TP one. So I can conclude, by now, that
    Rollei ATP does not seem to be the subsitute of TP. I would like to
    try with POTA developer, but after Delagi this seems a lost of time.

    Looking for technical sheets of Rollei ATP I see another developer,
    Docufine LC. From MSDS I find:

    hydroquinone 3 %
    sodium hydroxide 1 %
    sodium carbonate 8 %

    for a total amount of solids of 12 %

    But at point no. 9 of MSDS it is written that the solids content is 23
    %, very different from 12 % found before. So, where is the trick? Are
    there non dangerous components that increase the solids amount but
    essential for developer?
     
    piterengel, Mar 23, 2008
    #1
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  2. piterengel

    piterengel Guest

    A precisation.

    Data form MSDS are taken form english version of it (date:
    31.05.2006). Looking on the german version (date: 23.07.2003) of the
    same product I see:

    phenidone (a derivative of it) 1-2 %
    potassium 2,5-diidroxybenzensulponate 1-2 %
    diethylene glycol 10 %

    So the mistery is darker...
     
    piterengel, Mar 23, 2008
    #2
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  3. MSDS are legal not technical documents. They often
    obscure the contents of whatever they are written for as
    much as expose them. Many ingredients do not have to be
    listed if they are present in very small amounts. For
    instance, Kodak HC-110 contains a Phenidone derivative but
    its not included in the MSDS.
    I don't remember what is in Delagi No.8 but I am very
    skeptical that the Rollei film is much like Tech Pan other
    than being a very slow fine grain film. Technical Pan was
    not a microfilm although it could be used for document
    copying. Some high contrast microfilms can be used as extra
    fine grain pictorial films with special developers but there
    was something special about Tech Pan which plain microfilm
    does not seem to posses.
     
    Richard Knoppow, Mar 23, 2008
    #3
  4. piterengel

    piterengel Guest

    Delagi #8 is a modified POTA (from Anchell's book):

    Sodium sulphite 25 g
    Phenidone 1.4 g
    Borax 2 g
    benzotriazole 0.2 % 15 ml

    for 1 liter

    I completely agree with Mr. Knoppow: Rollei ATP is NOT the same of TP.
    And I was not able by now to find another film like that.

    Anyway, about MSDS, the principal matter, in my opinion, is that the
    two sources (the english version and the german one) give two
    completely different kind of developer, the first based on HQ and the
    second on phenidone. I think the truth is the addition of the two, a
    PQ developer. Surely I'll try this solution, as I'll be back to work
    where I've all chemicals. But first I'll try a very diluited rodinal
    solution, 1+300 for example, with a semi-static procedure. I'll let
    know results.
     
    piterengel, Mar 23, 2008
    #4
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