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  1. #1

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    Agfa gevachrome film, which process it uses?

    Hi all,

    Did any of you used agfa gevachrome? Which type of process (dev) it used?

    Many thanks!

    richard

  2. #2
    AgX
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    Could it be you refer to Gevacolor R films? Those were clour reversal films made by Gevaert.

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    They also made an unmasked color negative film, and a companion paper.

    PE

  4. #4
    AgX
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    Well, there were Gevachrome materials by Gevaert: orthochromatic(!) plates and sheet films.


    Concerning colour:

    The unmasked CN films were
    Gevacolor T6.51 (cine T13°),
    Gevacolor N5 (D13°),
    Gevacolor N3 (T13°),
    Gevacolor N5 (D17°),
    Gevacolor T 9.9.54 (cine T18°)

    The masked CN film was
    Gevacolor Mask


    The reversal films were
    Gevacolor R3 (T14°),
    Gevacolor R5 (D18°)

    [All speeds DIN]

    I don’t know about the precise colour formulae, at least an early CD employed was Di-ethyl-para-phenylene-diamine.
    Last edited by AgX; 03-22-2008 at 12:46 PM. Click to view previous post history. Reason: some typing errors

  5. #5
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    They used Dicolamine in one process. I forget what that trivial name translates into. Another developing agent used by both Agfa and Gevaert was N-Ethyl N-Sulfobutyl(?)-para phenylene diamine sodium salt. I'm not sure of the side nitrogen, alkyl sulfonic acid side chain length.

    I once had all of the formulas but have lost them or mislaid them over the years.

    PE

  6. #6
    AgX
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    PE,

    As I have got no Gevaert formulae at hand I took a reaction scheme I found in a Gevaert publication of '49. It can be that the developing agent I hinted at was only used as a model (though it is a classical one).

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    They used several developing agents during the life of both Agfa and Gevaert and Agfa-Gevaert products. I cannot recall the history of usage. I do remember that in one Gevaert process it was carried out at 68 deg F with some rather short process steps considering the fact that it was color.

    PE

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    I was just looking into buying not so old (i believe from the 80s) agfa-gevachrome 16mm code 702. I wonder if it's anything similar to kodak's VCN? Thanks for all the replies!

  9. #9
    AgX
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    Sorry Narigas,

    I thought the `Geva-´ prefix for colour films made in Mortsel was long gone.

  10. #10
    AgX
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    Took a second dive into my archive (now in the cine part) and I learned that Agfa offered between 1972 and 1984 camera and print (rather dupe) films of the brand Gevachrome.
    Can’t say anything on the process.

    There were two versions around. A first version and a version marked "II"; the latter was introduced in 1975.


    I knew that the Gevaert name in a way survived after the merger for the cine stock for a while but forgot that it was used until 1984...
    Last edited by AgX; 03-22-2008 at 03:57 PM. Click to view previous post history.

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