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David Aimone
15-May-2011, 13:23
I just shot 8 sheets 4x5 of TMAX and I'd like to develop in Pyrocat-MC instead of D-76. Anyone have a suggestion for a time/temperature in a jobo tank on a continuous motor base?

David

mdm
15-May-2011, 15:11
http://unblinkingeye.com/Articles/PCat/PCat4/pcat4.html

MC should have the same development time as HD.

evan clarke
15-May-2011, 16:22
I do 12 minutes at 68 deg., rotatiom 4.. EC

David Aimone
15-May-2011, 16:30
Formulary has it at 9 min @70 degrees F rated 500. I shot at 400, and I don't always trust the chart that comes with the developer.

Evan: what dilution do you use?

D. Bryant
16-May-2011, 08:54
I just shot 8 sheets 4x5 of TMAX and I'd like to develop in Pyrocat-MC instead of D-76. Anyone have a suggestion for a time/temperature in a jobo tank on a continuous motor base?

David

My recommendation is 8m @ 75F. YMMV.

Don Bryant

David Aimone
16-May-2011, 10:47
Dilution?


My recommendation is 8m @ 75F. YMMV.

Don Bryant

David Aimone
16-May-2011, 15:13
The literature from Photographers Formulary says 1+1+100 for 9 minutes at 70 degrees F, assuming continuous Jobo rotation, EI of 500 and grade two paper. Also says to increase time by 35% for VC paper printing?

Does this make sense? I shot the film at 400.

http://www.digitaltruth.com/products/formulary_tech/01-5095.pdf

evan clarke
16-May-2011, 17:13
Formulary has it at 9 min @70 degrees F rated 500. I shot at 400, and I don't always trust the chart that comes with the developer.

Evan: what dilution do you use?

1.5+1.5+100 rated at 320 for 12 minutes. I use acid stop and Hypam fixer and the negs are great.I can see no difference than when I used water stop and TF4..Evan

evan clarke
16-May-2011, 17:16
There is a huge variable which comes into play when comparing time..the pH of the water. Mine is dead neutral, luckily. Alkiline water will increase activity and acid water will decrease activity, neither is really bad but means you must test your own times..EC

Jay DeFehr
16-May-2011, 21:14
David,

I'm very skeptical of the PF recommendations. First, the EI of 500 seems very unlikely. This developer gives almost full box speed with intermittent agitation. Continuous agitation might not significantly decrease film speed, but it certainly won't increase film speed. Second, increasing development time for VC paper is not good practice, as it will only serve to increase grain, decrease sharpness, and it will have a negative impact on gradation. The recommendations to under expose and over develop will almost surely result in negatives that are difficult to print, and look pushed. I'd recommend exposing at box speed and would not recommend increasing development time for VC paper. 1:1:100, 8:00, 70F, Rotary would be my recommendation for average scenes. If you print on VC paper, you'll need to use some magenta filtration- this is normal, and has to do with the stain- it does not mean your film is under developed. Good luck!