My sister accidentally bought a hardening fixer rather than a non-hardening fixer from Adorama. Is the hardening fixer okay to use with Delta 100 and Ilford's RC paper?
As a little sidenote: I use the Kodak Fixer with hardener. I use a small cap-full of the hardener added to a large quantity of water and agitate with film after having fixed and before using hypo. It's helpful in taming the curl and softness of foma film.
Concerning wash times, if you use the Ilford washing sequence for film (fill with water, agitate 5 times, dump, repeat with 10 agitations, repeat with 20 agitations), you shouldn't use hardening fixer. With hardening fixer, use a longer conventional wash procedure.
My sister accidentally bought a hardening fixer rather than a non-hardening fixer from Adorama. Is the hardening fixer okay to use with Delta 100 and Ilford's RC paper?
I would just use the hardening fixer for film and get non hardening fixer for the paper. Paper fixed with hardner seems to be more difficult to spot in my experience even when processed archivally.