pyrocat hd lifespan

[JeffD]

I have a couple of bottles comprising pyrocat HD, which I bought from
the formulary a year or year and a half ago. These are the premixed
stock parts A and B. I have only used about 1/5 of what is in the bottles.

Would these be usable at this point? The online doc didn't give shelf life,
but I seemed to recall it is pretty high.

 

[lee]

I would try it out with a practice roll or sheet of film before I trust Pyrocat that old. My Pyrocat hd died at about 11 months.

lee\c

 

[c6h6o3]

A single solution, TEA-based developer like 510-Pyro avoids these issues completely.Good luck.

Jay

I'm not convinced of that yet. While 510 doesn't seem to lose reduction potential, I've gotten a dramatic shift in stain color of my Tmax 400 negs somewhere between 6 months and 1 year with it. I'll need to mix up a fresh batch and test it against my old 510 using the same fresh stop bath and fixer to be sure but at this point I can't take the above statement at face value.

It's been my experience that Solution A of the Formulary Pyrocat HD brew begins to weaken after about six months.

 

[noseoil]

I used the same Pyrocat HD from Formulary for a full year with no bad results. It finally was used up and I'm on another batch now. tim