Anyone using Flexicolor C-41 Fix for black and white

Hi, Is anyone of you using Flexicolor C-41 for fixing black and white film and paper?

If so what are the dilutions you are using?
I have a gallon jug of Flexicolor C-41 fix, and want to use it for black and white paper and film fixing.

Also, anyone know how long an open gallon will last?

Thank you

Just use the same strength for b&w film that is used for color. Dilute that 1:1 for paper.
I use 200 ml of concentrate per liter of fixer solution for film.

I dilute the concentrate 1:7 for film and paper.

PE has weighed in on this before, but basically you have to double the concentration that it's used in for color film, since B&W has way more silver than color film. I have at least a case of C41 fixer (4 gallons of concentrate) that I will probably use some for B&W at some point. It lasts seemingly forever in concentrate form, well over a year or two.

Ed

I don't know if the actual dilution is all that important. A rule of thumb is to fix for twice clearing time of the film. Total time is usually no more than ten minutes for me with the dilution I mentioned above. For shorter times a stronger dilution could be used.

here is a quote from PE when asked the same question...
"
For film, use C41 1:3 and for paper use 1:9. Use it with testing for silver and hypo retention to insure proper dilution and activity. Do not use B&W fixer for color though. You are on your own for fix and wash times otherwise.

PE"

its from this thread
(there was a url link here which no longer exists)

I have used c41 fixer for B&W films based on the 1:3 above and it worked fine.