Acufine / Diafine company history?

Discussion in 'B&W: Film, Paper, Chemistry' started by GarageBoy, Feb 25, 2013.

  1. GarageBoy

    GarageBoy Member

    Messages:
    652
    Joined:
    Nov 5, 2012
    Shooter:
    35mm
    Reading up on Acufine and Diafine and I was wondering, how old is the company? Who is behind it and what do they do? I don't see a website or anything
    Thanks
     
  2. zsas

    zsas Member

    Messages:
    1,957
    Joined:
    May 12, 2011
    Location:
    Chicago, IL
    Shooter:
    35mm RF
    I think, could be wrong, but Omega Brandess, out of Hampstead, MD, bought out Acufine of Vernon Hills, IL, not sure when...

    My box of Diafine says Omega Brandess. An old google search said Acufine was based out of IL....so I think a change has occurred....but I could be wrong....
     
  3. Gerald C Koch

    Gerald C Koch Member

    Messages:
    6,465
    Joined:
    Jul 12, 2010
    Location:
    Southern USA
    Shooter:
    Multi Format
    The manufacturing rights for these two products has been sold several times. The only company name I remember (and it might not be the first) is Baumann.
     
  4. GarageBoy

    GarageBoy Member

    Messages:
    652
    Joined:
    Nov 5, 2012
    Shooter:
    35mm
    Thanks
    How long has it been out?
     
  5. Gerald C Koch

    Gerald C Koch Member

    Messages:
    6,465
    Joined:
    Jul 12, 2010
    Location:
    Southern USA
    Shooter:
    Multi Format
    A bit more information. It was invented by Dr. Harold Baumann of Baumann Chemical later called Acufine Chemical and a few years ago it was sold to Charlie Brandess of BKA. I remember seeing ads in the 1960's.

    At the time Acufine was introduced it was common for film manufacturers to underrate the speed of their films. The idea being that it was better to overexpose than under expose. Thus Baumann was able to make exorbitant claims of increased speed for this developer. In reality it is a fairly pedestrian PQ formula.
     
    Last edited by a moderator: Feb 26, 2013
  6. Xpres

    Xpres Member

    Messages:
    65
    Joined:
    Jul 7, 2009
    Location:
    Essex, Engla
    Shooter:
    Medium Format
    Any idea what that pedestrian PQ formula is? I've seen many 'homebrew' versions around but none of them seem to quite hit the mark.
     
  7. Gerald C Koch

    Gerald C Koch Member

    Messages:
    6,465
    Joined:
    Jul 12, 2010
    Location:
    Southern USA
    Shooter:
    Multi Format
    Here are the 3 suggested substitute formulas for Acufine that I have.

    This formula appeared in the Dignan Newsletter.

    Distilled water (50°C) …………………………………………… 750 ml
    Phenidone ……………………………………………………………………………… 0.25 g
    Sodium sulfite (anhy) ……………………………………………… 60.0 g
    Hydroquinone ……………………………………………………………………… 2.5 g
    Sodium metaborate ………………………………………………………… 2.0 g
    Sodium bisulfite …………………………………………………………… 0.5 g
    Potassium bromide ………………………………………………………… 0.5 g
    Distilled water to make ………………………………………… 1.0 l

    This formula was suggested by Paul Farber in Photographic (Oct 1984).
    The published formula has been adjusted to yield 1 liter of solution.

    Distilled water (50°C) …………………………………………… 750 ml
    Phenidone ……………………………………………………………………………… 0.28 g
    Sodium sulfite (anhy) ……………………………………………… 60.0 g
    Hydroquinone ……………………………………………………………………… 5.0 g
    Sodium carbonate …………………………………………………………… 2.5 g
    Borax ………………………………………………………………………………………… 2.75 g
    Potassium bromide ………………………………………………………… 0.9 g
    Distilled water to make ………………………………………… 1.0 l

    I do not have a citation for the following formula.

    Distilled water (50°C) …………………………………………… 750 ml
    Phenidone ……………………………………………………………………………… 0.25 g
    Sodium sulfite (anhy) ……………………………………………… 50.0 g
    Hydroquinone ……………………………………………………………………… 5.0 g
    Borax ………………………………………………………………………………………… 2.5 g
    Potassium bromide ………………………………………………………… 0.5 g
    Distilled water to make ………………………………………… 1.0 l
     
    Last edited by a moderator: Mar 1, 2013
  8. Chamaeleo

    Chamaeleo Member

    Messages:
    9
    Joined:
    Jan 25, 2013
    Location:
    UK
    Shooter:
    Medium Format
    There are several formulae for phenidone-hydroquinone developers in the BJ Almanac 1956. For example, General Purpose Negative Developer:

    Sodium sulphite (sulfite in US) (anhydrous) 75 g
    Hydroquinone 8 g
    Sodium carbonate (anhydrous) 37.5 g
    Phenidone 0.25 g
    Potassium bromide 5 g
    Water to make 1 litre

    For tank development: diluted 1 + 5 water. Developing time 8 min at 68°F
     
  9. Gerald C Koch

    Gerald C Koch Member

    Messages:
    6,465
    Joined:
    Jul 12, 2010
    Location:
    Southern USA
    Shooter:
    Multi Format
    I have corrected my previous post to indicate that the three formulas are all specifically intended as substitutes for Acufine.
     
  10. albada

    albada Member

    Messages:
    742
    Joined:
    Apr 10, 2008
    Location:
    Escondido, C
    Shooter:
    35mm RF
    Jerry, do you know how the original formula was converted to grams? My notes have the following formula, which is supposedly what Farber published, but it's in teaspoons:

    Water (125F) -------------- 2.5 cups
    Phenidone ------------------ 1/8 tsp
    Sulfite ------------------------ 2 tbs + 1 tsp
    Hydroquinone ------------- 1 1/2 tsp
    Borax ------------------------ 1/2 tsp
    Sodium Carbonate ------ 3/8 tsp
    Potassium Bromide ---- 1/8 tsp
    Water to make ----------- 1 qt

    I suppose the best way is to actually measure out the ingredients in teaspoons and weigh them. But volume-based measurements of powders are inconsistent. I wish Farber had used grams.

    Mark Overton
     
  11. Gerald C Koch

    Gerald C Koch Member

    Messages:
    6,465
    Joined:
    Jul 12, 2010
    Location:
    Southern USA
    Shooter:
    Multi Format
    Mark, I rechecked my notes but there is just the formula. However IIRC the original quart size contained something like 67 g of product so the Farber formula fits pretty close to this weight. Jerry