1. Andrew O'Neill

    Andrew O'Neill Subscriber

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    Does anyone know of a reliable/economical source who will sell small quantities to lil 'ol me? Thank you.
     
  2. eclarke

    eclarke Member

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    This sounds interesting.
     
  3. MDR

    MDR Member

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    Maybe a tattoo shop has some for little money it's used for some tattoo inks.
     
  4. eclarke

    eclarke Member

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    I looked at some places where I have bought special chems and the stuff is frightfully expensive. Fischer Scientific wants $285 for 100g.
     
  5. Newt_on_Swings

    Newt_on_Swings Member

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    Ebay listing 310090916291

    About $30 shipped for 1 oz.
     
  6. eclarke

    eclarke Member

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    Neocyanine is an IR sensitizer i thought there might be some emulsion making going on here. I'm almost out of IR film.
     
  7. desertrat

    desertrat Subscriber

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    If the OP is looking for a negative retouching dye, that should work. If the OP is looking for an infrared sensitizing dye for film, the crocein scarlet probably won't.

    There are several cyanine derivatives that can be used. I don't have the link anymore, but somewhere in this emulsion making subforum, PE posted a page from an old Eastman Organic Chemicals list that had the common names and chemical names of some infrared sensitizers. A couple of these are being sold by Chemsavers (on the web) by their chemical names.
     
  8. desertrat

    desertrat Subscriber

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  9. kb3lms

    kb3lms Subscriber

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    Lab Depot, Science Lab and Colonial Scientific sell a number of those dyes as well. Chemsavers selection has been limited lately.

    The CROCEIN SCARLET dye structure does not look like a sensitizing dye at all.
     
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  10. Andrew O'Neill

    Andrew O'Neill Subscriber

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    Looking for some for possible emulsion making, as well as re-sensitizing x-ray film to hopefully give it some infrared sensitivity. I have heard that this may be possible, so I'd like to give it a try. I too, am almost out of IR film.
     
  11. Andrew O'Neill

    Andrew O'Neill Subscriber

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  12. Hexavalent

    Hexavalent Subscriber

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    I'd have serious doubts that tattoo ink, even if called neocyanine would work as a sensitizer. Most "inks" are pigment-based rather than dyes, and there is the issue of what else is in the ink. Then again, it's cheap enough to try :smile:
     
  13. MDR

    MDR Member

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  15. kb3lms

    kb3lms Subscriber

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    I've seen many of those laser dyes listed through other sources that won't sell to individuals. Many of them structurally appear that they would work, at least good enough to get an opinion from PE or someone that has more expertise than I do.
     
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  16. Photo Engineer

    Photo Engineer Subscriber

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    Just a word of caution. IR sensitizing dyes are notoriously bad for keeping. So, make sure that you store it cold or frozen until use, then dissolve it in the solvent of choice and use it. The film, like most IR films is going to be a poor keeper too.

    Now, this is relative to conventional dyes and films. They wont go bad over night.

    PE
     
  17. Andrew O'Neill

    Andrew O'Neill Subscriber

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    ... and bloody expensive. I wonder how far a gram of neocyanine can be stretched?
     
  18. Photo Engineer

    Photo Engineer Subscriber

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    Normal usage is about 25 - 100 mg per mole of Silver metal as analyzed in a coating. However, sensitizing by bathing a coating in the dye solution? All bets are off. Just remember that all dyes are desensitizers if used in excess and you can lose quite a bit of speed if not all of it by making a tiny error.

    PE
     
  19. ME Super

    ME Super Member

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    deleted
     
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  20. ME Super

    ME Super Member

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    What about phthalocyanine dye? It's an IR sensitive dye used in the manufacture of CD-Rs.
     
  21. Photo Engineer

    Photo Engineer Subscriber

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    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
     
  22. Andrew O'Neill

    Andrew O'Neill Subscriber

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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?
     
  23. Andrew O'Neill

    Andrew O'Neill Subscriber

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  24. Photo Engineer

    Photo Engineer Subscriber

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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
     
  25. Andrew O'Neill

    Andrew O'Neill Subscriber

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    Yes, you have, PE. Thank you. I was just curious.
     
  26. Photo Engineer

    Photo Engineer Subscriber

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    Try Sands Corporation of Titusville FL.

    PE