Hardening Fixer

[Pete Watkins]

I understand that Classic Pan sheet film needs a hardening fixer. I can't find a formula for a D.I.Y. hardening fixer. Can anybody help?
best wishes,
Pete.

[Ron Marshall]

Digitaltruth has a few formulas:


http://www.digitaltruth.com/techdata/kodak_f24.php

Add sulphuric acid to make it hardening

[r.e.]

The Film Developing Cookbook (Anchell/Troop) contains formulas for a glutaraldehyde hardener and two acid hardeners (Kodak Fixers F-5 and F-6 made without sodium thiosulfate). Do you want any of these formulas? Actually, if you want I could scan the formulas and associated discussion and send them by e-mail.

[JW Dewdney]

That's not actually the case. I thought so as well. Please see this thread:

http://www.apug.org/forums/forum37/37735-can-i-harden-post-fix.html

While the subject starts out SLIGHTLY off-topic for you... all the info is in there.

[Pete Watkins]

Many thanks for your help. I ordered The Film Developing Cookbook and The darkroom Cookbook from Amazon on Saturday, thanks for your offer r.e.
J.W. thanks for the guidance.
best wishes,
Pete.