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  1. #1
    dwdmguy's Avatar
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    PMK Pryo Noobie-Mixing question please

    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. #2
    wclark5179's Avatar
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    Take a look here:

    http://www.photoformulary.com/uploads/01-5050.pdf

    You should receive this with your oder.

    I believe the 25 liter is working solution.

    Stock is much smaller!

    I use mt soda bottles for the stock.

    Hope this helps you!

  3. #3
    wclark5179's Avatar
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    Here is a link to the product instruction sheets on Formularys Web Site:

    http://www.photoformulary.com/Deskto...dex=5&tabid=23

  4. #4
    dwdmguy's Avatar
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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. #5
    Thomas Bertilsson's Avatar
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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.
    "Often moments come looking for us". - Robert Frank

    "Make good art!" - Neil Gaiman

    "...the heart and mind are the true lens of the camera". - Yousuf Karsh

  6. #6
    c6h6o3's Avatar
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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. #7
    dwdmguy's Avatar
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    Thank you again and to you c6h6o3, great advise which I will take to heart for sure.

  8. #8
    dwdmguy's Avatar
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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. #9
    outwest's Avatar
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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. #10
    dwdmguy's Avatar
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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

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