I shot the Orwo NP22. Rated it at ISO 32 to compensate for the alost 30 years it is expired.
Developing went along almost smoothly. For ease, I used HC-110 dil. B. (1+31) rather than Xtol. I had to guess the developing time though. I looked at other film stocks and concluded that a time of 5 minutes in HC-110 would be the normal developing time for unexpired film of this type shot at box speed. The recipe said to develop for 1.5-2x the normal time, so I chose 8 minutes for this experiment.
The developer is supposed to be cold – 10C (50F), so I mixed it from water I had stored in the fridge. However, as it was very warm here, I noticed that the developer very quickly rose in temperature. When I poured it into the development tank, it was already 12C-15C and during development, it rose even further to about 20C. I therefore decided to cut the development short and stopped it after about 7 minutes.
It seems that base fogging is somewhat under control. But what I didn’t know was that the film was already exposed, so the negatives are overexposed due to the double expossure.
Since the original, 30 year old exposure contains images of persons and small children, I will not publish them. However there was this one rather cool double exposure.
The recipe I ended up using looks as follows:
- 300ml HC-110 dilution B ( 1+31)
- 2g iodized table salt
- Temperature 12C -> 20C (rising)
- Development time 7 minutes
- Agitation: 1 minute initially, then 3 turns every minute
- Fixing for 4 minutes
It needs tweeking, of course. Next time, I will try to control the temperature better using ice cubes or a large cold bath for the development tank.