Agfa gevachrome film, which process it uses?

Discussion in 'Color: Film, Paper, and Chemistry' started by narigas2006, Mar 22, 2008.

  1. narigas2006

    narigas2006 Member

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    Hi all,

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

    Many thanks!

    richard
     
  2. AgX

    AgX Member

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    Could it be you refer to Gevacolor R films? Those were clour reversal films made by Gevaert.
     
  3. Photo Engineer

    Photo Engineer Subscriber

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

    PE
     
  4. AgX

    AgX Member

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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.
     
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  5. Photo Engineer

    Photo Engineer Subscriber

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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. AgX

    AgX Member

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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).
     
  7. Photo Engineer

    Photo Engineer Subscriber

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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
     
  8. narigas2006

    narigas2006 Member

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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. AgX

    AgX Member

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    Sorry Narigas,

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

    AgX Member

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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...
     
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  11. narigas2006

    narigas2006 Member

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    Thanx heaps AgX, but would you know if I could develop it using E6? Many thanks!

    richard
     
  12. Photo Engineer

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    E6 is a hot process that requires specially hardened film. If this film is not hard enough it may wash off into the processing chemistry and ruin the entire process if done commercially. That will not earn you many friends at the local lab.

    At this date, it may be difficult to determine what the 'real' process is for this film.

    PE