1922 Kodak 2 Color Relief Film Patent

Discussion in 'Silver Gelatin Based Emulsion Making & Coating' started by Mustafa Umut Sarac, Jun 30, 2010.

  1. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    http://www.google.com/patents?id=HwxUAAAAEBAJ&pg=PA1&dq=intitle:color+inassignee:kodak&as_drrb_ap=q&as_minm_ap=0&as_miny_ap=&as_maxm_ap=0&as_maxy_ap=&as_drrb_is=b&as_minm_is=1&as_miny_is=1900&as_maxm_is=12&as_maxy_is=1928&as_psrg=1&as_psra=1&num=100&as_psra=1&source=gbs_selected_pages&cad=1#v=onepage&q&f=false

    This is interesting 1922 Kodak Two Color Photography Movie Film patent.

    It is very interesting because if you look closely , you will see the two sided , two emulsion film and the surfaces are not flat

    but gelatine relief

    like gelatine alt printing method or tiffdruck rotogravure cylinders as used as printing of National Geographic Magazine.

    They are two three dimensional surfaces and there is huge difference at rendering tones and printing strong colors.

    Best ,

    Mustafa Umut Sarac

    Istanbul
     
  2. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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  3. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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  4. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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  5. Q.G.

    Q.G. Inactive

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    What you have come across here, Mustafa, is John Capstaff's One and Only Original Kodachrome.

    No kidding.
     
  6. AgX

    AgX Member

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    You should not have emphazised on that. Now we shall see requests to start production again...
     
  7. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    I will try to locate the described chemicals at Sigma Catalog.
    Or write them to a chemistry forum and learn the modern names of them.
    Than learning the prices.
    It walks step by step.
    May be it would be possible to inkjet these two chemicals to the sides of transparent film.
    Or applying with Dye Transfer Process.
    I think dye transfer people would like to learn and use the original colors.
    I love RG too much and fallen in love with the short Kodak movie . I would be happy to see them at my photography.

    Umut
     
  8. Q.G.

    Q.G. Inactive

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    They are already trying to resurrect Capstaff's Kodachrome in the 'Autochrome' (i forget what the thread title is exactly) thread, i believe.
    :wink:

    The Boohoo-Kodachrome's-gone thread might take heart in the fact that what they bewail is not the Real Kodachrome anyway.

    P.S.
    That let's resurrect Capstaff's Kodachrome thread is called "Experiments with RGB-colored screens... a la Dufaycolor & Autochrome "
     
  9. happyjam64

    happyjam64 Member

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    Whoa! Has anyone ever tried this!?
     
  10. holmburgers

    holmburgers Member

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    I think a 2-color monopack would be awesome. I asked PE about it, and he said it would be 'relatively' easy to do with dye-bleach. Emphasis on 'relative'. Dye-bleach is used in cibachrome, and the idea is to utilize the silver image as a catalyst for the reduction or oxidation of the dye present in the emulsion. No color couplers, no controlled diffusion, or other complicated processing techniques. One would only need 2 layers, one sensitive to blue and the other to red, and two appropriate dyes to form a bluish-green & orange image. I believe that the chemicals required aren't very exotic or hard to find.

    No one ever marketed an integral, 2-color monopack, AFAIK, because by that point why would you settle for 2-color when you could have 3. This original Kodachrome can't be considered 'integral' in my opinion because the processing requires that you float either side of the dual-sided film on toning baths.

    edit: Reading the patent 1196080, it seems that it wasn't toned, but simply dyed. And it wasn't the duplitized film stock, my bad. But that being the case, it seems like any dye that can be used in dye-imbition could be used, as it only requires a differential reaction to tanned & untanned gelatin to form the dye image.
     
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