I'm very unfamiliar about color chemistry at all. I use different films and developers for my needs in B&W. There is only one constant is my workflow. I always use:
- Ilford Ilfostop Indicator stop bath which is originally orange when concentrated and yellow when diluted
- Ilford Rapid Fixer is transparent but I suppose some amount of stop bath mixed into fixer
Recently I decided to wash out some silver from my very old spoiled color films with outdeveloping them. I've just put my films to black and white fixer.
Unexpectedly fixer changed it's color to purple. So I'm but surprised about this:) What may root cause of this? Is it stop bath indicator reaction on color film or just washed dye?
Main question Is my fixer still usable? I know fixers are very resistant to pollution by other chemistry.