Weird FX-39 or is it just me

Discussion in 'B&W: Film, Paper, Chemistry' started by AndreasT, Jun 19, 2009.

  1. AndreasT

    AndreasT Member

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    Hello all,
    I have recently tried some Paterson FX-39 developer. Testing it with Tmax 400 film using a step wedge to determine film speed and graduation and all that.
    What bothers me is that my effective normal speed is iso-200 although it seems everybody states you get full speed. Or is only with a contrast of 1:32. Which isn`t practical in my opinion.
    Another thing is when I extend the development times I only get a very slight speed increase. Which actually decreases again at a +3 development because the film fogged a lot.
    Has anyone got any experience with this developer. Can my findings be confirmed?
    Thanks,
    Andreas
     
  2. Kevin Caulfield

    Kevin Caulfield Subscriber

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    I use it a lot, and have always found Paterson's listed dev times for different films to be spot-on, but I've never actually used it with a step wedge to determine true speed.
     
  3. AndreasT

    AndreasT Member

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    I just find that it fogs a lot when the development times are increased.
     
  4. Keith Tapscott.

    Keith Tapscott. Member

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    T-Max developer and Tetenal Ultrafin Plus are said to exploit film speed well. Whether they are significantly different from FX-39 for film speed, I don`t know.