Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 69,922   Posts: 1,522,101   Online: 777
      
Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 30

Thread: Neocyanine

  1. #11
    Andrew O'Neill's Avatar
    Join Date
    Jan 2004
    Location
    Coquitlam, BC, Canada
    Posts
    602
    Maybe a tattoo shop has some for little money it's used for some tattoo inks.
    This stuff? http://www.uoften.net/15ml-neocyanine-tattoo-ink.html

    Can't see how it would work... could it?

  2. #12
    Hexavalent's Avatar
    Join Date
    Nov 2009
    Location
    Ottawa, Ontario, Canada
    Shooter
    Multi Format
    Posts
    533
    Blog Entries
    3
    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
    - Ian

  3. #13
    MDR
    MDR is offline
    MDR's Avatar
    Join Date
    Sep 2006
    Location
    Austria
    Shooter
    Multi Format
    Posts
    1,041
    Hexavalent my advice with tattoo shops was more along the line of since they sell pre made neocyanine ink they might sell pure neocyanine for the do it (mix it) yourself tattooist.

    I found a UK source that sells dyes for laser applications http://www.photonicshop.co.uk/FE/pro...catid=&catid=7 (E7730) exact product page http://www.photonicshop.co.uk/FE/pro...il.asp?pid=151
    1g is 82 pounds.

  4. #14
    kb3lms's Avatar
    Join Date
    Jun 2006
    Location
    Reading, PA USA
    Shooter
    35mm
    Posts
    689
    Images
    5
    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.
    Last edited by kb3lms; 12-20-2013 at 03:10 PM. Click to view previous post history.
    All this has happened before, and all this will happen again.

  5. #15
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    22,926
    Images
    65
    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

  6. #16
    Andrew O'Neill's Avatar
    Join Date
    Jan 2004
    Location
    Coquitlam, BC, Canada
    Posts
    602
    ... and bloody expensive. I wonder how far a gram of neocyanine can be stretched?

  7. #17
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    22,926
    Images
    65
    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

  8. #18

    Join Date
    Apr 2011
    Location
    Central Illinois
    Shooter
    35mm
    Posts
    659
    deleted
    Last edited by ME Super; 12-20-2013 at 03:31 PM. Click to view previous post history. Reason: Off-topic for an emulsion making forum. Sorry! didn't realize where this thread was.
    ME Super

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

  9. #19

    Join Date
    Apr 2011
    Location
    Central Illinois
    Shooter
    35mm
    Posts
    659
    What about phthalocyanine dye? It's an IR sensitive dye used in the manufacture of CD-Rs.
    ME Super

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

  10. #20
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    22,926
    Images
    65
    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

Page 2 of 3 FirstFirst 123 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin