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  1. #1
    Mustafa Umut Sarac's Avatar
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    Coloring Kodachrome BW Developed Film after Scanning the 3 BW layers

    I read Jim Browning Post about an old technology which had been discarded after Digital Cameras.

    It was about taking photograph with color film , develop in BW Developer . Result was a film which have 3 layers , Red Green Blue transformed in to BW tone equivalent.

    Than the trick is to scan the film from back and front and altogether and find from two scans back and front layers first and minus from general scan picture to find the middle layer.

    I am agree , APUG is not a scanner friendly group and this technology dont produce too far result from C41 or E6 processed color film if everything has done calibrated but this technology is special for Kodachrome Film. Noone develops them , there are too many at the market and digital coloring is friendly for that.

    I think , if we apart from photoshop , other option is to scan Kodachrome BW film as much as you can with your scanner , print 3 inkjet positives and apply Dye Transfer Method.

    Another method is more analog and it came to my mind now.

    If we can print the digital bw inkjet printouts than we attach RGB filters to the analog camera one by one and for each filter , we photograph equivalent BW printout , film might record the each one of the bw films in to one of its layers. Than develop and see the picture.

    Question :

    What was the original BW developer of Kodachrome process. If I am not wrong , everything starts with 3 layer BW processed film.

    How can we match with Kodachromes original RGB colors with computer ? Is there a ICC for Kodachrome ? I think I know what to do ,
    Photoshop Evaluation and Alien Skin Plug in for Kodachrome Emulation is for 30 or so days.

    We can experiment with American RGB values , create blank RGB color files and than Kodachrome Emulation with Alien Skin , than Analysis than find the real values for computer.

    This is real result , faraway better than emulation because noise will be real.

    And most importantly how can we scan for example back layer without seeing others or 3 scans and computer could do it , I bet it can.

    Mustafa Umut Sarac
    Istanbul

  2. #2
    EASmithV's Avatar
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    A very interesting idea... If you can come up with a proof of concept image, i'd be fascinated to see it.
    www.EASmithV.com

    "The camera is an instrument that teaches people how to see without a camera."— Dorothea Lange
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    RIP Kodachrome

  3. #3
    Athiril's Avatar
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    You don't need an ICC profile for Kodachrome, as long as you can get some separation, you can get full separation using channel mixer, and then a good colour balance using colour balance tool and levels.

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    >>And most importantly how can we scan for example back layer without seeing others or 3 scans

    Therein lies the problem.

  5. #5

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    The general optical scanner cannot scan three layers of the film and tells the differences of three layers and based on this information to manipulate the image.

    May be it is possible to develop one layer at a time using different chemicals or processes.

    This requires take three pictures for the same image every time. Each picture will be used to develop one layer.

  6. #6

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    The Kodachrome process was very complicated, the film consisted of many layers. The color development portion of the process consisted of three separate color development steps. The film did not contain any color couplers. Each of the three couplers was in a separate color developer. It is incorrect to think of the Kodachrome process as a black and white process. There are several sites on the web that explain the process.

    While it is theoretically possible to retain color information using only BW developers, most of the Kodachrome process would still have to be used. The film would have to be re-exposed three times and developed three times. This is something that is no longer possible since the last machine that could do this is now gone. Not only that but there seems no way to obtain the color information from such a BW positive without being able to scan each of the three layers containing a BW positive seperately. No scanner at present can do this. You would need a cross between a scanner and a microscope.

    The coup de grace is that no one is making this film anymore. The coating machines for it are long gone.
    Last edited by Gerald C Koch; 10-14-2012 at 12:04 PM. Click to view previous post history.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

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  7. #7
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    Coloring Kodachrome BW Developed Film after Scanning the 3 BW layers

    The sad part is that Dwayne's tried to GIVE AWAY the machine, but no one, not even any museums would take it because it was just too big (it was I was there at the lab on the last day). I took pictures of the machine ON Kodachrome then developed them in said machine, what a trip!

    Anyway, man I hope someone can find a way, I miss Kodachrome so badly.


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    ~Stone | "...of course, that's just my opinion. I could be wrong." ~Dennis Miller



 

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