Agfa G74C developer, how to?

[kiemchacsu]

Hello rff fellows,

I just bought from a photographer who switches to digital bunch of Agfa g74c developer. To be precise, 5l of each g74c A and B solutions.
Needless to say that this is the first time I've heard about this, but I want to give it a try.
He gave me initial instruction:
1 part A + 30 parts water + 1 part B to make working solution.
Dev time for Kodak Tri X is 7 mins 20C
For sure that I will try but also want to listen from experts here if anyone has worked with this developer before. Quickly read from user manual, I understand that this is mainly used to develop another type of bw film rather than that of normal roll film.
Thank you for your time.


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[sevo]

If you must ask, you'd best use something else. According to Agfa, G74C is "a high activity, continuous tone developer, used for developing black and white continuous tone aerial images in roller transport processors". You probably do not have a roller transport processor, and even if you use Aviphot (in one of its Rollei or Adox incarnations) you will be processing for pictorial Gamma (approx. 0.6) rather than the 1.0 of standard aerial systems.

It is marketed as a ultra-fast acting developer (a mere 20s to Gamma 1.0 at 30°C) - given that 7 minutes sounds rather long, even more so as you are aiming at a softer result. If it comes out too hard, leave out part B (speeder) entirely.

The date sheet is here: http://www.agfa.com/specialty-products/wp-content/uploads/sites/8/2017/06/G74C-AD74.pdf

 

[kiemchacsu]

Thank for your information,
I do understand that this developer is not designed for normal bw film.
But I am also convinced that it can be used in another form and dilution as stated in Agfa document [below]
I will report the result in this thread later once I developed a roll.

This developer can also be used for other types of continuous tone applications, if necessary with a different dilution rate need to achieve longer development times.

 

[kiemchacsu]

Well, I finally can do a test by myself.
Based on provided instruction, I modify a littlbe and do a test first with one roll Kentmere 100, with following recipe
*************
Agfa G74C part A: 30ml
Water: 960ml
Agfa G74C part B: 30ml
All to make 1020ml working solution
*************
I develope Kentmenre 100 within 7mins 20oC with above solution,
Checking the negative, I found that the highlight was a little bit blown out.
Sample below: (larger files on FLickr site)

1707_K100_02 by Trung Nguyen, on Flickr

1707_K100_03 by Trung Nguyen, on Flickr