Which is the best pyro for MF Jobo processing?

[Andrew O'Neill]

On the large format forum there has also been some discussion on it. Or perhaps that was only about unexpectedly low activity of ready-bought pyrocat. I can't comment; I haven't experienced it myself with my DIY chemistry. The formula doesn't seem very prone to sudden death looking at its chemistry; perhaps the vitamin C versions are more likely to exhibit this, analogous to XTOL.

I lied. That was the only time I've heard of this issue. Mix from scratch is the safe option.

 

[Sirius Glass]

Now that I purchased Pyrocat-HD in Gylcol Film Developer I am not finding development time, temperature and film speed information for Kodak Tri-X 400 in 120, Ilford Delta 3200 in 120, Rollei Infrared 400 in 120. References? Sources? Recommendations? Please.

 

[Eric Rose]

massive development website??

 

[Sirius Glass]

massive development website??

Not much there.

I am considering using two step developing and staining after.

 

[KenS]

Which is the best pyro for Jobo processing for 120 Tri-X 400, 4"x5" HP5+, 4"x5" TMax 100, and 4"x5" TMax 400?

ABC Plus Pyro [Rollo Pyro]?
Pyrocat-HD Film Developer?
Pyrocat-HD in Gylcol Film Developer?
Pyrocat-MC in Gylcol Film Developer?
​

Advice please.

After having 'tried' them all.... I'm now 'stuck' with Pyrocat HD for all my sheet film developing. There is minimal to no obvious 'stain'
But I am sure I'm getting 'sharper grain'. (I also use only BTZS tubes and 'rotary' development.. no more hangers in tank or tray development that I had been using for some 40+ years
I mix mine from 'scratch' using a somewhat archaic three-beam balance' and distilled water

Ken

 

[koraks]

There is minimal to no obvious 'stain'

Develop two sheets, one in pyrocat, one in any old non-staining developer. Look at them side by side. The stain will be very evident indeed.

 

[Eric Rose]

Not much there.

I am considering using two step developing and staining after.

Does the Ed Buffalo site have anything new from Sandy King. Or you could try Sandy's website.

 

[KenS]

Which is the best pyro for Jobo processing for 120 Tri-X 400, 4"x5" HP5+, 4"x5" TMax 100, and 4"x5" TMax 400?

ABC Plus Pyro [Rollo Pyro]?
Pyrocat-HD Film Developer?
Pyrocat-HD in Gylcol Film Developer?
Pyrocat-MC in Gylcol Film Developer?
​

Advice please.

Since I 'found' Pyrocat HD, (about 10 or so years ago) it is now the ONLY film developer 'allowed' in my darkroom.. for any and ALL large format BW negatives (developed in BTZS tubes).
Might I suggest that you check out Dr. Sandy KIng's web site for all the information you are likely to 'need". I use an archaic three-beam balance for measuring out the required amount of 'raw chemical' for dissolving in distilled water.

Ken


Ken

 

[Sirius Glass]

Success I developed 120 Tri-X in Pyrocat HD in Glycol in a Jobo processor using 9 minutes @ 70 degrees.

 

[Eric Rose]

Awesome! You will love both printing and scanning PyroCat-HD negs.

 

[Sirius Glass]

Awesome! You will love both printing and scanning PyroCat-HD negs.

Yes I will enjoy using my enlarger to print the negatives. Now to find the developing time for Ilford Delta 32000 in 120 at ISO 32000.