PMK/Pyro - How much solution per 120 roll of film

Discussion in 'Darkroom Developing and Printing' started by Ranyart, Jul 19, 2003.

  1. Ranyart

    Ranyart Guest

    Wondering how much solution of 1:2:100 dilution of PMK
    I need per roll of 12exp 120 film?

    I have a tank that will hold two rolls, but don't know
    if the tank will hold enough solution to correctly develop
    two rolls of film.

    Ranyart, Jul 19, 2003
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  2. I develop 4 35mm rolls in PMK, using a tank that holds 1 liter of
    solution. I can only do 2 120 rolls in the same tank and volume of
    solution. Two rolls of 120 film in a 1 liter tank is no problem at all
    for PMK at 1:2:100 dilution.

    Mike Sullivan
    Mike Sullivan, Jul 20, 2003
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  3. Hutchings recommends 300 ml of PMK per roll. I just tried to find the
    reference in his book and couldn't, but I'm fairly certain that's the
    right number. It's a little more than most tanks will hold if you
    develop two 120 rolls per reel but close enough that it should be worth
    a try. Look at the color of the developer when you pour it off. It it
    looks like strong tea or weak coffee you're probably all right. If it
    looks like espresso you probably need more.
    David Rifkind, Jul 21, 2003
  4. 250 mL, according to Gordon Hutchings, who created the formula. But my tank
    needs 500 mL to cover a 120 roll. You could put two 120 or one 220 roll on
    one reel and 500 mL would have enough activity to do the job.

    Jim MacKenzie, Jul 21, 2003
  5. I've always followed Hutchings' recommendations. I agitate for two violent
    shakes every fifteen seconds. Each time I agitate I twist the tank and set
    it down with a different orientation so that it's slowly being rotated as I
    agitate. I haven't had any streaking problems.

    Jim MacKenzie, Jul 21, 2003
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