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Thread: Neocyanine

  1. #21
    Andrew O'Neill's Avatar
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    Thanks, PE. I think I'd be better off actually making an IR emulsion from scratch. Could one sensitize an emulsion with just one dye such as phthalocyanine or neocyanine?

  2. #22
    Andrew O'Neill's Avatar
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    I wonder how well this would work...
    http://www.sigmaaldrich.com/catalog/...g=fr&region=CA

    1g=$93CDN

  3. #23
    Photo Engineer's Avatar
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    I wouldn't use hat perchlorate salt.

    Any emulsion can be made IR sensitive, if you use the right dye. I have posted some examples here on APUG several times.

    PE

  4. #24
    Andrew O'Neill's Avatar
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    Yes, you have, PE. Thank you. I was just curious.

  5. #25
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    Try Sands Corporation of Titusville FL.

    PE

  6. #26
    Athiril's Avatar
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    There is a type of chlorophyll that is actually near IR sensitive. It was found in some algae species recently I think. IIRC it was Chlorophyll F.

    Ah, here it is here -
    http://en.wikipedia.org/wiki/Chlorophyll_f

  7. #27

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    Quote Originally Posted by Photo Engineer View Post
    Generically, phthalocyanines are sensitizing dyes, but their effectiveness just as with other dyes must be determined by some means such as actually doing the experiment.

    PE
    Thanks Ron. It's been a few days since I checked this thread. I figured some experimentation would be required. It's been a little crazy here with the holidays.
    ME Super

    Shoot more film.
    There are eight ways to put a slide into a projector tray. Seven of them are wrong.

  8. #28
    Andrew O'Neill's Avatar
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    Not sure where one could easily source chlorophyll F.

  9. #29
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    Quote Originally Posted by Photo Engineer View Post
    Generically, phthalocyanines are sensitizing dyes, but their effectiveness just as with other dyes must be determined by some means such as actually doing the experiment.
    This is interesting. Without checking I had written off pthalocyanines as sensitizers because of the general structure and I didn't recall seeing them in any of the references I have.

    Is it the metal free phthalocyanines that are sensitizers? Or, are the metal varieties, eg copper or nickel pthalocyanine, included?

    The prices of pthalocyanines are almost reasonable!

    -- jason
    All this has happened before, and all this will happen again.

  10. #30
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    Jason, IIRC, it is the metal free varieties.

    PE

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