Normally I pre-soak 35mm FP4 in water at a similar temperature to the dev/fix for about five minutes - just done this usual procedure with 120 FP4 and the watr was dark coloured when I poured it out. Is it a dye?
I have never had this with 35mm, what is it? Why on 120 and not 35mm? Should 120 not be pre-soaked but 35mm ok to pre-soak?
Any thoughts or preferably answers welcomed!