Hello all, there is conflicting data (10 mins here and here but 14 mins elsewhere) on how long to develop Delta 3200 (120, not 35mm). I was wondering if anyone could share their experiences. I know someone had tested this film/dev combo for Clayton but I cannot recall who. Maybe @marcmarc and @kreeger would know. Thank you so much!
Found one image on Flickr with information. 1:9 7 minutes for Delta 3200 in F76+.
Alternatively, when I don't have times, I look at ratios of times in different developers on Massive Dev Chart. For example, you can observe that one developer at a certain dilution will always be about +20% of the time of another developer at a certain dilution, no matter what the film. It takes a bit of time to go through the chart and find the mathematical relationship by collecting data points, but it works.
Massive dev chart also has a time. 10 minutes at 1:9. That's probably the safer bet. Perhaps the other one was at 1600 EI.
Some people also shoot at 3200 and develop for 6400 when it comes to these fast films. So I doubt a couple extra minutes over the 10 would hurt. In any case you'll have to dial it in with a little trial and error to your personal process.
Odd that Clayton provides times for TMax films but not Delta. As F76 was designed to have the same working characters as D76, I crossed check the times for both F76 and D76, MDC lists Della 3200 at box speed at 10.5. If it were me I would go with 10 minutes at a starting point as both Delta 35 and 120 are the same emulsion. If you have time you can buy a short roll of Delta 3200 in 35mm for a test run.
I have a data sheet for Clayton F76+ (used internally by a lab). These figures are for Clayton F76+, 1 + 9, in a Jobo machine, thus you should increase them by 15% if you’re using intermittent agitation, e.g., small or large tanks.
Delta 3200: 10:45 at 20 degrees C and 8:30 at 24 degrees C.
I hope that these figures prove helpful—let us know!
Thank you all. I did 10:30, based on your responses and some relational time math between D76 and F76+ across other films.
1 minute + 3 inversions every 30 seconds at 20 degrees C.
Delta 3200 Base Fog is not something that I'm overly familiar with, but going by highlight density, I would say that they look a bit underdeveloped to me. I'll try 11:30 next time around.
Teaching Advanced Darkroom this semester so trying to build a binder of film stock tests.
It's been a while, but for the record, 14 minutes in f76+ 68F seems more like it if you shoot at 3200. Given how flat Delta 3200 is, I would probably consider pushing to 16
It's been a while, but for the record, 14 minutes in f76+ 68F seems more like it if you shoot at 3200. Given how flat Delta 3200 is, I would probably consider pushing to 16
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