Sorting through my darkroom I have found an unopened bottle of Tetenal Ultrafin that must be around 10 years old, but stored in good conditions. I've processed a roll with it and everything seems to be working perfectly. However under my Jobo based processing regime Delta 100 needs 6 minutes with a dilution of 1+19 (12.5ml concentrate). I know Tetenal list dilutions up to 1+29, but does anyone know of a any minimum quantity recommendations for Ultrafin?
Looking at the higher dilutions for processing slower films, eg. Pan F Plus. I remember I initially moved away from Ultrafin due to some overdevelopment / grain issues with 400 speed films, but I seem to recall using a 1+9 dilution which may simply be too strong with this developer.
Looking at the higher dilutions for processing slower films, eg. Pan F Plus. I remember I initially moved away from Ultrafin due to some overdevelopment / grain issues with 400 speed films, but I seem to recall using a 1+9 dilution which may simply be too strong with this developer.
