C41 Stab = E6 Stab

Discussion in 'Color: Film, Paper, and Chemistry' started by EASmithV, Apr 6, 2012.

  1. EASmithV

    EASmithV Member

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  2. Athiril

    Athiril Subscriber

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    Kodak Stabiliser III you can, yes, it's 37% formaldehyde in water with methanol. PE also says it contains some photoflo.
     
  3. EASmithV

    EASmithV Member

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    YES! thank you!
     
  4. EASmithV

    EASmithV Member

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    Wait, Do I have to mix it all up as 5 gallons or can I just mix a partial amount of the bottle?
     
  5. Athiril

    Athiril Subscriber

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    Partial amount, as you need it.
     
  6. EASmithV

    EASmithV Member

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    Just got some. How long does it last in an opened bottle?
     
  7. Mike Wilde

    Mike Wilde Member

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    Ages. What is formaldehyde good for? Preserving organic material from degradation.
     
  8. nworth

    nworth Subscriber

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    As you can see below, the positive and negative stabilizers are nearly the same. The negative (C-41) one has a bit more formaldehyde.

    Kodak S-16 stabilizer
    Used in Process VNF-1 for Ektachrome color reversal motion picture film
    Water (21 – 27C) 800 ml
    Kodak Stabilizer Additive 0.14ml
    Formaldehyde (37%) 3.5 ml
    Water to make 1 l
    Treat film for 30 seconds at 35C.
    Note: Kodak stabilizer additive contains polyethylene 12 tridecyl alcohol.

    Not quite the same as E-6 stabilizer, but close.

    C-41 stabilizer
    This was listed as the “semi-official” formula for the Kodak C-41 process
    Water 800 ml
    Formaldehyde (38%) 5 ml
    Kodak MX812 0.8 ml (wetting agent)
    Water to make 1 l
    Ref: Dignan Photographic Newsletter, July 1974
     
  9. Photo Engineer

    Photo Engineer Subscriber

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    The stabilizing additive and wetting agents are virtually identical and are equivalent to Photo Flo 200.

    In E6 films and in older C41 films, the Formalin served two purposes. First, it was a biostat that reacted partly with gelatin and remained in the coating for a long long time, killing microorganisms. The second, and main purpose was that it reacted with leftover coupler and linked it together with itself in a bond called a methylene bridge. This prevented serious dye fade. That latter problem has been solved in modern C41 films, but has not in E6 films due to lack of R&D.

    PE
     
  10. EASmithV

    EASmithV Member

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    Thanks NWorth, Ron
     
  11. Photo Engineer

    Photo Engineer Subscriber

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    I am preparing a lengthy and hopefully definitive post on stabilizers. I am working on it.

    PE