Would 1946 Kodachrome film be able to be developed in black in white using benzotriozole

Discussion in 'Film and Processing' started by TimDelans, Jul 7, 2020.

  1. My first post here, my 1946 Kodachrome film keeps turning out black and EXTREMELY dense i did 3 minutes development time and it still came out black! Would benzotriozole be a good option for cutting down age fog on the film?
  2. if your film was made in 1946... then no one would really expect it to be usable UNLESS it had been stored in -32 freezer non stop
  3. Have you checked whether the blackness is due to a strong antihalation coating?

    For example: does it rub off easily?
  4. That thought also occurred to me reading this -- some of the movie films had a "remjet" coating, I am afraid I wasn't quite starting to shoot Kodachrome in 1946, so I've no idea what it may have had -- perhaps it was just movie film in a different package? But I also found some exposed Verichrome Pan in a TLR here a few years back that produced seriously bullet-proof density from latent images that had been there since 1981 and sitting around at room temperature all the while. I could though see enough image to determine what the subjects were -- but those images were "only" 28 or so years old.
  5. What's the provenance of the film? Do you know how it was stored? Is this film that you are shooting now or did you find this in a camera? Is the density over the entire film area or only in the frames with something different on the edges and between frames?
  6. William Michael

    William Michael Moderator Staff Member

    Gidday Tim, welcome.

    You've found a Forum formed by a Membership with a vast repository of knowledge spread across a multiplicity of Photography related topics.

    One bit of advice I will give to you, is, if you really do want a detailed answer and also perhaps some key bits of ancillary advice, you will need to engage: that means providing the detailed information requested of you.

    The forum has many one time wonders, folk who post one or two questions and are never seen again - I advise that you don't be one of those - and I reckon you'll get invaluable assistance, for nix.

  7. I removed the rem jet backing before putting it in the developer, (i use stock solution d76)it must of been the age fog. no I’m not shooting the film. i found this in a keystone A-7 and unfortunately the storage is unknown other than being in a camera for a LONG TIME... and yes, The density covers the entire negative front and back whole width from end to end.
    William Michael likes this.
  8. "Front and back"?
    There should be no density on the back of the film - that would definitely be an anti-halation coating.

    If the film is totally fogged I don't think any developer additive will help, because it sounds as if the film itself is heavily fogged. An 'antifoggant' like benzotriazole only reduces the developer activity in lightly exposed areas of the film.

    Full-strength D-76 usually takes more than 5 minutes @ 20 degrees C to give a normal density negative on any film. So nearly opaque black after only 3 minutes seems a bit strange.

    D-76 isn't the lowest fog developer though. T-max or HC-110 might be 'cleaner'.

    Of course you have nothing to lose by trying benzotriazole, but I really don't hold out much hope of getting useable negatives from a film that's been in unknown storage conditions for 74 years.
    Last edited: Jul 9, 2020
  9. Sorry for the confusion, when i said front and back i meant you couldn’t see anything from either side when looking through the negatives. it was just black.
  10. Soak it in a warm baking soda in water solution, and what Remjet if any is on there should fall off, or if not at least rub off gently with your fingers.

    K-14 process Kodachrome did have Remjet-I'm not sure about older versions.

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