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Thread: Autochrome

  1. #21
    dmr
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    Quote Originally Posted by Photo Engineer View Post
    There is also the set from WWI that was on display a while back. The URL was posted here, but I can't locate it offhand.
    PE, I think this is the one you mean:

    http://www.damninteresting.com/?p=245

    There are some links on that page too. I find that process (Autochrome) amazing. It's incredibly simple, but produced some brilliant images.

    Edit: This link is more likely the collection you're referring to:

    http://www.worldwaronecolorphotos.com/

  2. #22
    htmlguru4242's Avatar
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    Jim, the idea of the layer over the film is a really good one, and it might work. We discussed it earlier, but could not come up with a really good method. The issue seems to be finding the proper dyes for it that wont wash out or interfere with the emulsion. Unless we dont use dyes .....

    Hmmm

    That's a really good idea.

    What could be coated OVER an emulsion that:
    1.) Can be coated in the dark
    2.) Will not interfere with the senstizing dye
    3.) Will not wash out, change color or move during processing
    4.) Will not interfere with the developer or emulsion
    5.) Will be relatively stable

    I'm going to grab a sheet of paper this weekend, and overcoat some gelatine onto it. If that works, there is hope!

  3. #23
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    Quote Originally Posted by htmlguru4242 View Post
    Jim, the idea of the layer over the film is a really good one, and it might work. We discussed it earlier, but could not come up with a really good method. The issue seems to be finding the proper dyes for it that wont wash out or interfere with the emulsion. Unless we dont use dyes .....

    Hmmm

    That's a really good idea.

    What could be coated OVER an emulsion that:
    1.) Can be coated in the dark
    2.) Will not interfere with the senstizing dye
    3.) Will not wash out, change color or move during processing
    4.) Will not interfere with the developer or emulsion
    5.) Will be relatively stable

    I'm going to grab a sheet of paper this weekend, and overcoat some gelatine onto it. If that works, there is hope!
    Gelatin?

    PE

  4. #24
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    Yes, PE, I was planning on using gelatin; its just what to put in it that would be dyed that's in question here ...

  5. #25
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    I would add the anionic dye to gelatin as a solution and mix it with a cationic mordant then at the right proportion to cause minute specks of dye-mordant particles. That is, if I understand you correctly.

    When I worked in image transfer, I worked on a number of dye incorporation methods, and some worked and some did not.

    PE

  6. #26
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    That's an interesting idea, PE, and I believe that we discussed it at one point before. It still needs to be concluded whether or not the particles will be of the right size, thoguh

  7. #27
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    You can get preformed polymeric beads in various micron sizes that are transparent. They can be anionic or cationic and can be used for this.

    They are often sold as ion exchange resins, although most of the resins are rather brownish. You have to pick and choose.

    PE

  8. #28
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    PE, that's quite interesting. So are you saying that the dyes would be deposited on the resins, or am I misinterpereting you?

  9. #29
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    They dyes would be on and in the resins.

    PE

  10. #30
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    That's an interesting idea; I'm going to look into this ... just have to find out where to source them.

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