DHodson
20-Jan-2017, 10:29
I've been using Ilford FP4+ (4x5) and Ilfosol 3 @ 1:9 in BTZS tubes as a starting point to learn developing. The developing times are fairly short (less than 4 min if you adjust for continuous agitation according to Ilford) and I wanted to extend the developing time by increasing the dilution to 1:14.
The Ilford spec sheet for Ilfosol 3 says 500 ml will develop 24 135/36 rolls at 1:14 which I believe works out to 96 4x5 sheets. That means each sheet requires 5.2 ml of developer. The BTZS cap only holds 60 ml of solution and at 1:14 would only contain 4 ml of developer (Massive Dev Chart).
That suggests there's not enough developer in the tube do 1:14. Can anyone confirm this? I can run some test negatives but I'd rather not waste the time and money if it's a non-starter.
Thanks for any help you can give me
Dave
The Ilford spec sheet for Ilfosol 3 says 500 ml will develop 24 135/36 rolls at 1:14 which I believe works out to 96 4x5 sheets. That means each sheet requires 5.2 ml of developer. The BTZS cap only holds 60 ml of solution and at 1:14 would only contain 4 ml of developer (Massive Dev Chart).
That suggests there's not enough developer in the tube do 1:14. Can anyone confirm this? I can run some test negatives but I'd rather not waste the time and money if it's a non-starter.
Thanks for any help you can give me
Dave