Agfa gevachrome film, which process it uses?
Did any of you used agfa gevachrome? Which type of process (dev) it used?
Could it be you refer to Gevacolor R films? Those were clour reversal films made by Gevaert.
They also made an unmasked color negative film, and a companion paper.
Well, there were Gevachrome materials by Gevaert: orthochromatic(!) plates and sheet films.
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
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 01:46 PM. Click to view previous post history.
Reason: some typing errors
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.
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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).
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.
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!
I thought the `Geva-´ prefix for colour films made in Mortsel was long gone.
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 04:57 PM. Click to view previous post history.