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  1. #1

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    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.

  2. #2

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    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.
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  3. #3

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    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.

  4. #4

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    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?

  5. #5

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    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.

  6. #6
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    William:

    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 10m45s
    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.
    Clay

  7. #7

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    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.

    Sandy King

  8. #8

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    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.

  9. #9

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    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%.

    Sandy

  10. #10

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    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.
    Thanks again

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