Pyro and Hypam fix?

[Drew Wiley]

I prefer TF4 as a universal one-shot fixer. A tad price, but it's much faster to use on prints, and supplies an alkaline environment for pyro negs. Per base stain, depends on the class of film involved. Films which come closer to the definition of old thick emulsions like HP5 and Bergger 200 accept a lot of base
stain; at the opposite extreme, T-grain films almost none.

[Tim V]

I have no idea what Bergger Pancro 400 is classed as, but I noticed it has quite a high level of base stain / fog. Maybe just my box?

[Tim V]

Ps: how long are people rinsing negs with Hypam and / or TF4?

[Doremus Scudder]

Ps: how long are people rinsing negs with Hypam and / or TF4?

Pyro negs shouldn't be treated with hypo-clearing agent, since it can remove image stain. Therefore, if you want well-washed negatives, you need to wash 20-30 minutes in running water (or the equivalent with fill-and-dump). I always wash for 30 minutes. See the sticky thread over on Photrio about film washing here: https://www.photrio.com/forum/thread...ng-test.69416/

If you don't use a staining developer, you can use a wash aid and significantly reduce wash times.

Best,

Doremus