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Thread: Tri-X Reciprocity Failure

  1. #1

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    Tri-X Reciprocity Failure

    Reciprocity failure is a big problem for me (not just the spelling), so I have been looking at what manufacturers say about their products. At https://imaging.kodakalaris.com/site...f4017_TriX.pdf, I came across a very odd graph:
    Click image for larger version. 

Name:	Kodak-Tri-X-reciprocity.jpg 
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ID:	207428
    What does it all mean?

  2. #2

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    Re: Tri-X Reciprocity Failure

    Hunt around for one that does have the actual numbers on it. I have one taped in my field notebook. These are graphs that suggest how to take what your metered exposure is and then compare to what is longer (sometimes MUCH longer) and should get you to good exposure accounting for reciprocity failure. Cutting back development time a bit helps too. Using TMAX 100 instead of Tri-x in such situations makes it a lot easier as far less adjustment is needed. TMAX becomes, in effect, a much faster film in low light if you're talking about time on "T."

  3. #3

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    Re: Tri-X Reciprocity Failure

    Nelari

    I checked the Kodak site and it comes up gibberish as you experienced. I believe it is supposed to be this one, which is self explanatory:

    https://duckduckgo.com/?q=kodak+tri-...ge001_7514.gif

  4. #4

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    Re: Tri-X Reciprocity Failure

    Quote Originally Posted by Kevin Crisp View Post
    Nelari

    I checked the Kodak site and it comes up gibberish as you experienced. I believe it is supposed to be this one, which is self explanatory:

    https://duckduckgo.com/?q=kodak+tri-...ge001_7514.gif
    OK - thank you! I shall certainly try the TMAX 100 that you suggested. I really dislike reciprocity failure. And Fuji Acros is uncomfortably expensive.

  5. #5

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    Re: Tri-X Reciprocity Failure

    Exposures that would require quite a bit of adjustment with Tri-x require none with the TM.

    See:

    https://imaging.kodakalaris.com/site...6_tmax_100.pdf
    Last edited by Kevin Crisp; 4-Sep-2020 at 14:49.

  6. #6
    Resident Heretic Bruce Watson's Avatar
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    Re: Tri-X Reciprocity Failure

    Quote Originally Posted by Nelari View Post
    I shall certainly try the TMAX 100 that you suggested. I really dislike reciprocity failure. And Fuji Acros is uncomfortably expensive.
    I found for my landscape work in 5x4 with Tri-X that I routinely had exposures around 1/4s. This meant with Tri-X that I was right on the edge of reciprocity failure in my shadows (Zone III). Try as I might I couldn't get consistent results; one time I'd get detail in my shadow, the next the shadows would be blank. Finally, after months of ignoring the urging I was getting to try TMY from this forum (yeah, yeah, I know, I know), I bought a box. Boom. Problem solved. I never finished the remaining sheets in the Tri-X box.

    But that's not all that TMY did for me. Not only was it considerably more predictable in returning shadow detail, it was also more linear (short toe). I also found it to be more linear in the highlights. But the kicker for me was the tones that TMY rendered from the scene were a better match to what I was seeing in my head while looking at the composition on the ground glass. It just mapped better from color to B&W for me. Actually, a lot better. I was able to substantially reduce the manipulations I was making to get the print that I wanted.

    I grew up with Tri-X. Probably have like 30 years of Tri-X experience. I knew Tri-X inside out. So I did not let Tri-X go easily. I really had to talk myself into learning another film. But just a few sheets of TMY had me thinking I'd never go back. And I never have.

    People think I'm joking when I say that TMY is the finest film ever made. But I mean it.

    Bruce Watson

  7. #7

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    Re: Tri-X Reciprocity Failure

    I finally succeeded in scanning my first TMAX100 images - and am impressed. This one was shot under a railway bridge with my homemade roll-film pinhole camera: Click image for larger version. 

Name:	Railway Bridge.jpg 
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ID:	207961The aperture is about 250, so the exposure was longish, 20 minutes (10 minutes multiplied by two for reciprocity failure.) Remarkably, there was no need to "correct" brightness or contrast or anything on the computer. (Development was Rodinal 1+50, 18min.)

    This is as good as my images get. The other films I have tried do not come even close.
    Last edited by Nelari; 21-Sep-2020 at 12:33.

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