Semi Stand development & streaking

sanking · Dec 2, 2009

juan said:
Interesting - I assume the Pyrocat A bath can be used repeatedly for at least some period of time, but what about the B?
juan

Both solutions can be re-used three or four times if done so within a window of two or three hours. In other words, if you were developing two rolls of 120 film with a liter of Solution A and B you could use the same liter to develop up to eight rolls of film over a period of two or three hours. I am positive of this as I have done so several times.

I am fairly certain (but have not tested it) that Solution A would be ok the next day, and perhaps for several days, but Solution B turns very dark in 12-24 hours and would definitely not be good.

Sandy King

Willie Jan · Dec 7, 2009

sanking said:
If your major goal is to get a good printing negative in scenes of very high contrast I would recommend that you consider two-bath development. With this type of development the film absorbs the reducer in Solution A, then when you place the film in the alkaline accelerator (Solution B) development takes place, but is limited by the amount of reducer the film absorbed.

I tried 2 bath development, but the streaking was even more than with semistand. I did a presoak, 5 min in solution A and 10 min in Solution B (1:20).
I got a hint that when inserting in solution B that i would have to agitate immediately because this could give streaks, but even than i got them..
I used a dilution of 1:20 for this.

sanking · Dec 7, 2009

Willie Jan said:
I got a hint that when inserting in solution B that i would have to agitate immediately because this could give streaks, but even than i got them..
I used a dilution of 1:20 for this.

Try agitation every third seconds, or continuous agitation if you still get streaks. If you don't agitate continuously, at the very least agitate very vigorously for about 30 seconds right after the film goes into the developer.

Make sure that in both Solution A and B you wet out the film and begin agitation almost immediately, say by just dropping the film on reel into a tank filled with developer instead of pouring the developer in.

If you don't agitate continuously, at the very least agitate very vigorously for about 30 seconds right after the film goes into the developer.

Sandy King

Willie Jan · Dec 8, 2009

sanking said:
Try agitation every third seconds, or continuous agitation if you still get streaks. If you don't agitate continuously, at the very least agitate very vigorously for about 30 seconds right after the film goes into the developer.

Make sure that in both Solution A and B you wet out the film and begin agitation almost immediately, say by just dropping the film on reel into a tank filled with developer instead of pouring the developer in.

If you don't agitate continuously, at the very least agitate very vigorously for about 30 seconds right after the film goes into the developer.

Sandy King

I will give it a try.

frotog · Dec 8, 2009

I can't tell you why but in my experience bromide drag is eliminated with slightly warmer processing temps (72-73 degrees f.).

Willie Jan · Dec 9, 2009

frotog said:
I can't tell you why but in my experience bromide drag is eliminated with slightly warmer processing temps (72-73 degrees f.).

that is very interesting.
I will try is out.

Thanks.

Semi Stand development & streaking

sanking

Willie Jan

sanking

Willie Jan

frotog

Willie Jan

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