Quote Originally Posted by 2F/2F View Post
I've often wondered why is it that Blix is bad for film, but not for paper.
There are several reasons, first of which is the fact that film has up to 3x the amount of silver halide and second of which, the films are very heavy in iodide which slows bleaching and fixing.

But also of major consideration is that mixing bleaching agents and fixing agents together dilutes them enough to reduce capacity and activity.

In addition, you need "boosters" in both sides of the chemistry that can be antagonistic to each other or just plain limited in solubility.

All of this in combination makes a blix less efficient with film when compared with silver. I might also add that in reversal films, 100% of the Silver halide is left as Silver metal which really makes the burden on the bleach portion rough!

PE