Trying to find post showing times for developing tmax400 in pyrocat HD 2:2:100 in tube, Sorry if this is right in front of me.
I imagine that Jorge has the times. I did find that Clay Harmon posted the following times for 1.5-3-100 dilution. SBR 6----16 minutes
SBR 7----10 minutes
SBR 9----8 minutes
SBR 11---5.5 minutes
These are for a density range of 1.4. Should be fairly close to what you want. Good luck.
Thanks for reply... I have the times you mention but I need the 2:2:100 dilution to keep the times down so the extra stain won't be a problem with extended times.
I dont have times for 2:2:100, but I am not sure what the problem is. I think Clay has times for up to 19 min with no significant increase in b+f.
Are you seeing increase on b+f with extended times?
Developed an extra neg. from recent shoot on a foggy morning and extended dev. to 16 minutes. I have not tried printing this neg. yet but therre seems to be quite a bit of stain in film edge....
I read somewhere Sandy King recommends the 2:2:100 dilution for palladium negs.
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Here is a cut and paste from an email I sent to some others recently. i just re-ran a bunch of tests at 2:2:100 in the jobo, and here are the Tmax films:
Jobo expert drums 73 degrees pyrocat HD 2:2:100 Target Density Range of 1.4
Tmax 100 TMX
Effective film speed: 50
N-2 6-1/2 minutes
N-1 8-1/2 minutes
N+1 16-1/2 minutes
TMAX 400 TMY
Effective film speed 320
N-2 5-1/2 minutes
N-1 8 minutes
N 10-1/2 minutes
N+1 16 minutes
One note. Sandy and I have been corresponding about occasional stain in the film rebate area, and I think we have tracked it down to excessive rotation speed on the Jobo. I now run it a the absolute lowest speed - even slower than the "F" setting. Since I have done this, the stain has gone away.
Actually I have the information for TMAX-400 in the 2:2:100 dilution of Pyrocat-HD but can not access it right now. Might be able to do so later this evening or tomorrow. The information I have is based on a set of BTZS type tests developed by Clay. which he then sent me for a UV reading. From the test data I can easily calculate approximate developing time for the DR of about 1.75 needed for palladium.
Thanks for the help everyone... Sandy the 1.75 sounds like what I'm looking for. The times you sent me for Tri-x work fine.
OK, I managed to get the data.
For a DR of 1.75, actual UV reading suitable for Palladium, here is what I show.
SBR 10 5.5 minutes
SBR 9 8:00 minutes
SBR 8 9:45 minutes
SBR 7 12:00 minutes
SBR 6 16:00 minutes
Clay developed this set of TMAX-400 negatives in Jobo at 73F, with Pyrocat-HD 2:2:100, but as I recall he used the very fast rotation. The negatives have a lot of b+f stain, which in my opinion would be reduced considerably by a slower rate of rotation. My own tests of TMAX-400, which were done in BTZS types tubes, with moderate agitation, resulted in considerably less b+f stain than this particular batch.
Reducing the amount of fog stain is desirable because the stain is highly actinic and adds a lot of printing time with UV processes. And if you lower b+f stain you can reach the same negative density range with less development so the times above are probably too long by about 10-15%.
Thanks Sandy, this is just what I was looking for. I'm using the Phil Davis Power Dial and I understand it takes care of adjusting for different sbr's as far as film speed goes.