PMK Pryo Noobie-Mixing question please

Discussion in 'B&W: Film, Paper, Chemistry' started by dwdmguy, Oct 12, 2009.

  1. dwdmguy

    dwdmguy Member

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    Good day.
    I have looked thru but can't really find an answer to this.

    I ordered and received the Photographers' Formulary PMK PYRO-METOL KODALK DEVELOPER and have never used this before.
    It's the 25Liter volume.

    Of course I can't use the entire 25 liters at first but I don't have a scale.
    How would you recommend proceeding please for my first mix use?

    My jobo bottles are 1000ml so I'd like to start there.

    Which reminds me, is this Pyro good for a rotorary drum?
    Thank you for any help.
     
  2. wclark5179

    wclark5179 Member

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  3. wclark5179

    wclark5179 Member

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  4. dwdmguy

    dwdmguy Member

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    Thank you. My box did not have this sheet.

    So, in the instructions for mixing the stock, I am using the entire contents of each of the chems, correct? So I don't have to measure?

    Then keeping both the A and the B in 2 bottles until I'm ready to make working per the instructions.
    Seems like a very long life for the Stock which I'm a bit happy about.

    Thank you.
     
  5. Thomas Bertilsson

    Thomas Bertilsson Subscriber

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    Yes, you use all of the chemicals in the little plastic envelopes to mix your stock solutions.
    Then you use a small amount of concentrate to mix your working solution just before you process your film.
     
  6. c6h6o3

    c6h6o3 Member

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    If you are mixing stock from powders, be sure to wear a respirator when handling pyro. Breathing it's dust will cause lung damage. I used to mix mine outdoors.
     
  7. dwdmguy

    dwdmguy Member

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    Thank you again and to you c6h6o3, great advise which I will take to heart for sure.
     
  8. dwdmguy

    dwdmguy Member

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    P.S.
    I perfer using my processor (rotorary drum)
    May I assume that knocking of the usual 10-15% is ok?
    Thank you again.
     
  9. outwest

    outwest Subscriber

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    For rotary processing with PMK, Gordon Hutchings recommends adding a small quantity of EDTA to the working solution. Prepare a 1% solution by dissolving 10 grams of EDTA in 1000 ml of water. Add 5 ml of the 1% solution per liter of PMK just before developing the film. 300 ml of the 1:2:100 solution is recommended for each 8x10 equivalent (36 exp 35mm, 120 roll, 4x 4x5).
     
  10. dwdmguy

    dwdmguy Member

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    outwest, thank you so much, I completely understand the mixing of the EDTA for a 1% solution but get a bit confused when you write "1:2:100 solution"

    Thanks for your help.
    T
     
  11. outwest

    outwest Subscriber

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    1cc Part A, 2cc Part B, per 100cc distilled water - the standard working dilution for PMK.
     
  12. dwdmguy

    dwdmguy Member

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    Again, thank you for your help. I'm almost ready. One thing that thru me for a small loop is that the instruction booklet that you attached states to place the negs back into the used developer which of course is hard for the jobo processor, or it states to use as an alt. to use a alkaline after bath by adding 5 grams of sodium metaborate per liter of water.
    I'm assuming I can set this up as an additional bottle / step in my processor but would worry about the rotation for the two moments. Do you think I should do this with a full two moments?
    Again, Thank you for your help.