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  1. #1

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    MIXING MICRODOL-X

    I would like to mix Microdol-X from scratch. Has anyone had experiences doing this that they can share?

    Steve Anchell's books suggest the following fromula:
    1. 750 ml Water at 125 F
    2. 5 grams Metol
    3. 100 grams Sodium Sulfite, anhydrous
    4. 30 grams Sodium Chloride
    5. Cold water to make 1 liter

    Will this formula match Kodak's packaged Microdol-X?
    Thanks, Joseph

  2. #2
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    I tried this formula once, and I didn't find that it performed the same as the real thing. Using this formula, the grain is larger than with real Microdol-X. Using the same times as for the Kodak product produced good negs, just not what I expected. This formula is very much like D23 with some salt added. Might as well just use D23 IMO.
    See what others have to say, and then decide.
    Dean
    [COLOR=Sienna][FONT=Arial]Some days are diamonds. Some days a tree crashes through your roof.[/FONT][/COLOR]

  3. #3

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    Quote Originally Posted by Joseph
    I would like to mix Microdol-X from scratch. Has anyone had experiences doing this that they can share?

    Steve Anchell's books suggest the following fromula:
    1. 750 ml Water at 125 F
    2. 5 grams Metol
    3. 100 grams Sodium Sulfite, anhydrous
    4. 30 grams Sodium Chloride
    5. Cold water to make 1 liter

    Will this formula match Kodak's packaged Microdol-X?
    Thanks, Joseph

    This formulation is substantially different than the one I published in the Apug Chemistry section (with a modification suggested by Patrick Gainer):

    "Here is Ronald W. Anderson's Microdol-X substitute formula. This formula was published in the 1973 Dignan Photographic Newsletter.

    Microdol-X Substitute

    Water-----------------------750. ml
    Metol-------------------------7.5 grams
    Sodium Sulfite (anhy)--------100 grams
    Sodium Bisulfite----------------7.5 grams
    Water to make---------------1.0 liter

    This formula works fine with the normal developing times given for Microdol-X (both use 1:3 dilution). The results: The same, even to image tone.


    Pat Gainer suggests that adding 30 to 50 grams of canning salt or iodine free table salt to this recipe may result in a reduction in granularity without significantly increasing development time.

    http://www.apug.org/forums/forum37/9308-alternatives-ilford-perceptol.html "


    Note the increase in the amount of Metol and the addition of 7.5 grams of Sodium Bisulfite which distinguish this formulation from Kodak D23.

    This formulation is basically Kodak D-25 with iodine free salt added.
    Tom Hoskinson
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  4. #4
    tbm
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    I use Microdol-X diluted 1:3 almost always pursuant to page 70 of [/I]The Film Developing Cookbook[I] as well as a pro Leica shooter who also does the same and I get amazing tonality and sharpness on every occasion! I love Microdol!

  5. #5

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    Soium Chloride?

    Tom: I had read the APUG Mic-X formula.

    1. How is Sodium Chloride (30 grams) different from Sodium Bisulfite
    (7.5 grams) for one liter of Mic-X?

    2. Does one liter require 7.5 grams of Metol or does 5 grams work OK?

    Thanks fo your info.

  6. #6

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    Quote Originally Posted by Joseph
    I would like to mix Microdol-X from scratch. Has anyone had experiences doing this that they can share?

    Steve Anchell's books suggest the following fromula:
    1. 750 ml Water at 125 F
    2. 5 grams Metol
    3. 100 grams Sodium Sulfite, anhydrous
    4. 30 grams Sodium Chloride
    5. Cold water to make 1 liter

    Will this formula match Kodak's packaged Microdol-X?
    Thanks, Joseph
    I'm currently testing a similar formula (5g Metol, 100g Sulfite, 33g NaCl, 1g Boric acid to 1l solution). First tests with APX100 (11:00min 1+3, 24deg, rotation) gave an CI of 0.64, excellent sharpness and the finest grain I ever had with APX100. I can't compare with Microdol-X, I never tried the stuff. Speed is about 40 ASA, I rate the APX100 64 ASA with D76H 1+1 with a similar CI.

    Martin

  7. #7

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    Quote Originally Posted by Joseph
    Tom: I had read the APUG Mic-X formula.

    1. How is Sodium Chloride (30 grams) different from Sodium Bisulfite
    (7.5 grams) for one liter of Mic-X?

    2. Does one liter require 7.5 grams of Metol or does 5 grams work OK?

    Thanks fo your info.
    Joseph, you asked:

    1. How is Sodium Chloride (30 grams) different from Sodium Bisulfite
    (7.5 grams) for one liter of Mic-X?

    Sodium Chloride apparently acts as a weak restrainer in the Gainer version of the formulation. Again, it must be straight sodium chloride - no iodine.

    Sodium Bisulfite acts as a developer preservative. It also acts as a pH buffer in combination with the sodium sulfite.

    2. Does one liter require 7.5 grams of Metol or does 5 grams work OK?

    The Kodak D23 and D25 formulations published by Morgan and Morgan in the 1977 Edition of The Compact Photo Lab Index, both call out 7.5 grams of Metol for 1 liter of stock solution developer.

    Either of these developers can be diluted 1:1 or 1:3 to make a one-shot working developer (as can the official Kodak version of Microdol-X).

    I have always used all three of these developers as 1:3 one-shot dilutions (the equivalent of 2.5 grams/liter of Metol) with good results.

    With regard to diluting the 5 gram version 1:1 or 1:3, try it and see if it works for you.
    Tom Hoskinson
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  8. #8

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    I thought a silver sequestrant was necessary if you add NaCl to the developer? I believe I've read that the "X" in Microdol-X refers to that secret ingredient. I certainly got dichroic fog when I added salt to a phenidone/ascorbic developer.

  9. #9

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    I see nothing to indicate that a silver sequestrant is necessary when you add NaCl to this metol/sulfite formulation. Phenidone/ascorbic is a different animal.

    Perhaps Pat Gainer will chime in on this.
    Tom Hoskinson
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    Everything is analog - even digital :D

  10. #10

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    I forgot to mention, someone ran an FTIR Spectroscopic analysis on Microdol X and posted the results. The constituent ingredients were the same as Kodak D25 plus NaCl and Calgon.
    Tom Hoskinson
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    Everything is analog - even digital :D

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