HP5+

[fpiner]

Has anyone had a problem with a whiteish deposit on the back of HP5+ 4x5 film? Processed in D76, Kodak Fixer and through wash. thanks, fp

 

[Vaughn]

Yes, but with FP4+ when using a Jobo Drum and Kodak fixer (Rapid Fix w/ hardener). Solved the problem by switching to a non-hardening fix (Ilford), though Kodak Rapid Fix w/o adding the part B (hardener) might also work.

The cause -- not sure, but in my case, perhaps the hardener hardened the anti-halation layer before it could be totally removed (since it gets removed slowly in a drum...this is just a guess). But changing to a non-hardening fix fixed the problem...I don't care why!LOL!

Vaughn

 

[Philippe-Georges]

Yes, I apparently had, and by trial and error I found that a 2% Glacial acid bath for about 2 min. @ room temperature (and washing again) saved the negatives.
If this is the same problem you have, then the same cure might help, who knows?

Good luck,

Philippe

 

[Ian Grant]

Ilford don't recommend using a hardening fixer for normal use, not because you shouldn't but rather because it's totally unnecessary and requires increase wash times. In some cases an acid hardening fixer can contain a very fine precipitate taht gets on your film & adheres to it, as Philippe says an acetic acid bath will remove this.

I used to have to filter my fixer regularly when I used an acid hardening fixer.

Ian