Agfa gevachrome film, which process it uses?

narigas2006 · Mar 22, 2008

Hi all,

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

Many thanks!

richard

AgX · Mar 22, 2008

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

Photo Engineer · Mar 22, 2008

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

PE

AgX · Mar 22, 2008

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.

Photo Engineer · Mar 22, 2008

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

AgX · Mar 22, 2008

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).

Photo Engineer · Mar 22, 2008

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

narigas2006 · Mar 22, 2008

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!

AgX · Mar 22, 2008

Sorry Narigas,

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

AgX · Mar 22, 2008

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...

narigas2006 · Mar 24, 2008

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

richard

Photo Engineer · Mar 24, 2008

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

Agfa gevachrome film, which process it uses?

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