I was reviewing the manufacturer's recommendations the other night (first roll of Delta 3200 in 120), and was idly curious about their recommended agitation schedule (5sec every 30 sec), wherease I had picked up 10 sec every minute from somewhere. I presume that this was because I was using DK-50 + HP5, and wanted better edge effects, but the younger me isn't answering today.
What do the other roll-film types here do, and any rationale?
oh, I see, for roll film I do 10 seconds every 60. Have for 35 years and experience no problems.
Sheet film is in trays and done continuously
When I develop roll films, I generally use 3 inversions every minute or so - unless i have a good reason for doing something else. 35mm film I give 2 inversions every 30sec - it's all just habit.
Sheet film in tank gets 2 inversions every 5 minutes with very dilute developer - almost stand development. Or it goes in the tray, which could be anything from continuous to 30minute intervals depending on flim, developer and subject.
So I won't vote :P
PMK likes lots of agitation, so every 15 seconds.
Most films, every 30 seconds, but Delta 400 in Perceptol seems happy with once per minute.
In trays I'll shuffle negs continuously in pyro developers, but others I may cycle every 30 sec., rotating 90 degrees periodically, and shuffling with one more rotation than the number of sheets per cycle, so that the same sheet isn't always on top.
When I do it by hand it's 10 seconds per minute. Which I thought was the Ilford way. 5sec per 30 seconds I thought was the Kodak way. Some of this is related to how long you develop. If you're at the low end of the time range then I think the 5sec every 30 is going to make more sense then if you're using a dilute developer and looking at 15minutes.
With the motorbase I've no idea how fast it goes.
Start with 30 sec continuous and a good rap on the tank to dislodge the bubbles. Then it was two inversions (5sec) every 30 sec. Now with PMK it is 1 inversion every 15 sec. After inversion I clock the tank 90 degrees before the next inversion.
I haven't developed roll film in years. On my 4X5 film, I continuously interleave--bottom to top. On 8X10 and 12X20 film, I brush develop and this is a fairly continuous process as well.
Could you eplain the technique of brush development and its benefits for 8x10? 12x20 would probably give you no other options, but I'm curious how brush development helps with 8x10. Do you develop by inspection with brush development?
Usually 5 complete tank inversions every minute.
If I'm looking for some compensation, I spread the inversions to each 2 min.
Haven't tried stand development yet...
Slightly OT - re brush development (if I understood right)
I used to develop large prints using paint rollers...