2

On a recent trip to Russia I bought about a dozen canisters of B/W film I previously never heard about. FWIW, I bought them in two different stores in Moscow and St. Petersburg.

The guys at the store thankfully told me the development time for D76 and though the film seems to be the same: They call it "A125" and it is obviously bulk-loaded into repurposed film canisters, I got contradictory indications on the development times. D76 1+1 14 min in St P. and D76 1+1 12min in Moscow.

My Berlin lab of trust uses T-max RS and ideally I would like to get it developed there.

I currently don't have the possibility to develop it myself and seeing that I am not aware of a lab in Berlin that uses D76, I was wondering what my options are:

First: Does anyone have additional information about this stock of film?

Second: Does someone know development times for other developers, ideally T-max RS?

Lastly and most importantly, is there any way to deduce the development time, using the massive dev chart and using films with similar dev times in D76 as a reference?

  • I don’t think anyone could really say with any certainty. Since you have a dozen rolls...best to sacrifice one using different amounts of development to see what works best. – Hueco Jul 6 at 23:37
1

First of all development times for B/W are just not that critical: you can get decent negs with fairly widely-varying times. Obviously if you want optimal & very repeatable negs you need to be significantly more careful. But you're not going to get that anyway if you buy random film, and actually some variation can be interesting sometimes.

That being said: look up a bunch of films in the massive dev chart and find their processing times with D-76 1+1. Especially look for ones with dev times around 10-15 minutes. Look up the same films' times for TMax-RS. Compute the ratios between the times: are they all approximately the same? If they're not, are the ones with D-76 times in the right ballpark approximately the same ratio? If they are use that factor, if not, look for films which have the same speed, and times between 10 & 15 minutes & repeat. Finally if there really is no common factor just guess something reasonable: chances are it will be fine.

  • Thank you for the answer. This is what I'll do. According to this guy, the film handles long development times gracefully: analoguegeek.com/2018/02/10/… – MTTI Jul 8 at 11:15
0

I agree with Hueco.

Sacrifice one roll and use it to do some tests.

Have the lab clip sections of the roll and develop them at different times to see what time gives the best density.

0

D76 1:1 12 minutes 20°C normal agitation - to ISO 140 (low contrast). D76 1:1 15 minutes 20°C normal agitation - to ISO 150. HC110 dilution B 3 mins 10 sec to ISO 400

  • Could you provide a source or back this claim up? Also I exposed the film at ISO 120 seeing as it's the closest I could get to the nominal 125 – MTTI Jul 11 at 14:01
  • The source is Russian film processing lab and my own experiments. – Iliah Borg Jul 11 at 14:35

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.