Really pushing T-Max 400

Discussion in 'The Darkroom' started by darin3200, Aug 22, 2005.

  1. darin3200

    darin3200 TPF Noob!

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    So I went to a gathering with some of my friends and it was dark. The only film I have is kodak uc 400 and tmax 400. I put in tmax and discover I need to shoot it at 3200 to get decent shutter speeds. With a 30% time increase in the developer I pretty much have to double the dev time.
    It should be fun to see if it works. I'm too tired to develop tonight, so first thing tomorrow morning this film is going to get developed :mrgreen:
     
  2. Meysha

    Meysha still being picky Vicky

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    That sounds awesome. I'm too lazy to develop my own stuff... and I'm also too addicted to digital - that doesn't really help.

    This got me wondering, and sorry if I hijack your thread, but are you able to do the same thing to normal colour negative film and drop it into a lab (or would it have to be a pro lab - not just a machine)?
     
  3. KevinR

    KevinR TPF Noob!

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    A pro lab would be the best bet. When I managed mini labs, I would occasionally push process if it came up. But it was kind of hit and miss with the automated developing machines. I would shut the drive down and guesstimate the developing.
     
  4. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

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    I'm confused. Adding 30% to the dev time wouldn't be anywhere near doubling it. That would be adding 100% to dev time. A quick look at the Tmax 400 tech pub, and I think adding 50% to 100% the dev is about what you want to do, depending on the developer you are using (for instance 6.5 min dev time at ISO 400 with Tmax RS jumps to 12 min with Tmax RS at ISO 3200).

    Tmax tech pub

    http://www.kodak.com/global/en/prof...#small-tankprocessing(8-or16-ouncetank)—rolls
     
  5. darin3200

    darin3200 TPF Noob!

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    Like KevinR said pro labs could probably do it, but our town has a wal-mart and I don't know if I would trust them :)

    Ooops, I meant to say a 30% increase in development time per stop pushed, 400 to 800 to 1600 to 3200 would be 3 stops times 30% gives a 90% increase. Thanks for the spec sheet, its very helpful.
     
  6. darin3200

    darin3200 TPF Noob!

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    UPDATE: So I developed the film for 16 minutes. The develope I used was some cheap stuff branded Adorama but from what I read it was pretty much generic D-76. Agitation was an inversion every 30 seconds. The shots came out looking underdeveloped but I have quite a few shots to work with. :thumbup:
     
  7. Patrick

    Patrick TPF Noob!

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    Did you use it stock or diluted?
    I've got some tmax 400 Might have to go play for awhile...LOL
    I can't imagine inversions every 30 seconds for say 18 min or so.....:thumbup:
     
  8. darin3200

    darin3200 TPF Noob!

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    I really don't know, the stuff I was using was generic 'film developer' from adorama. I'm guessing it was stock though because I typically developed T-Max for 8 minutes which the recommened time with d-76 stock.

    And the picture came out nicely, here's one of the nicer ones with some marks showing my carelessness in the darkroom

    sample pic
     
  9. DocFrankenstein

    DocFrankenstein Clinically Insane?

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    3 stops of 30% increase wouldn't be 100% increase.

    you have to 1.3^3=2.20

    Which is about 120% increase in dev time. How grainy is it?
     
  10. santino

    santino TPF Noob!

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  11. darin3200

    darin3200 TPF Noob!

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    Interesting, I never though to go exponentially. The film could've used a little more development. The film is grainy but terribly so.
     
  12. darin3200

    darin3200 TPF Noob!

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    That's a crazy development technique. I haven't used tri-x before but I plan on buying some soon. And while I'm at it maybe some new 'print' developer ;)
     

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