Specific Spectral Sensityzing Dyes-Anyone Interested ?

Discussion in 'Silver Gelatin Based Emulsion Making & Coating' started by wildbillbugman, Oct 29, 2011.

  1. wildbillbugman

    wildbillbugman Member

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    Hello to everyone,
    A few years ago PE recommended,on another Thread, red and green sensitizing dyes from from H.W. Sands. I purchased these dyes for $150/g and have been working with them ever since.
    Now, H.W.Sands has quoted the same red sensitive dye at $395/g. Is there anyone out there who,like me, wants to follow PE's reccomendation and try this dye. I am thinking along the lines of a "shared purchase".
    The dye arrives in dry form and must be weighed on an analiticle balance, then disolved in methanol and refridgerated.. After a couple of years at 4C, it still "works".
    I have requested a quote from Honywell on another red sensitizing dye that, like the H.W. Sands dye is a green sensitizing dye, but will form "J aggrigates" and become a red sensitizing dye.
    Bill
     
  2. Hexavalent

    Hexavalent Subscriber

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    PM sent
     
  3. Kirk Keyes

    Kirk Keyes Member

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    OK - I'm in.
     
  4. wildbillbugman

    wildbillbugman Member

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    Great Kirk ! That brings us to 3, possibly 4. I think that 4 is plenty. 250mg each aint that many emulsions at 150-200mg/mole of Ag. Most of you are not the emulsion making maniac that I am . But the price of silver is slowing even me down.
    There is the matter of what we want to do about H.W. Sands minimum order of $500. Do you want to purchase some green sensitive dye. I have a pretty good ammount of SDE3008. That I have used at only 100mg/m. I am perfectly willing to give some of that to all participants. If your serious enough to buy expensive dyes, your experience can only help me. Please note that I had to disolve the 3008 at only 0.2% in methanol, whereas the 3057 is at 1%.. I am also looking into the pricing of some red and green sensitizing dyes from Honeywell. IDK if they are any cheaper, or even if they will work as well as the Sands dyes.
    Bil
     
  5. wildbillbugman

    wildbillbugman Member

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    My 4th buyer just fell through. I will wait until Wednesday. Then I will place the order. Remember everybody. It is not just me advocating this dye as a red sensitizer,. PE is the person who first recommended it.
    Bill
     
  6. Andrew O'Neill

    Andrew O'Neill Subscriber

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    I'm interested in IR dyes...
     
  7. wildbillbugman

    wildbillbugman Member

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    Andrew,
    I don't know whether the J agrigate of SDA3057 absorbs in the IR range. I know of no spectrum measured of the J agrigate.
    Honeywell offers 2 IR sensitizers. Search "honeywell Dyes"
    Good Luck
    Bill
     
  8. holmburgers

    holmburgers Member

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  9. wildbillbugman

    wildbillbugman Member

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    Thank you Holmburgers,
    Any chance I can sell you some SDA30057 ?:D
    Bill
     
  10. holmburgers

    holmburgers Member

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    I'll take it off your hands for small "convenience fee" (paid by you of course)... hehehe.

    No, I'd love some, but as a wise man once told me, a running camel never shits (Mustafa). I've been running from project to project for too long and need to focus on ye olden ones.
     
  11. Hexavalent

    Hexavalent Subscriber

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    That's solved my "what tattoo to get" dilemma :tongue:
     
  12. holmburgers

    holmburgers Member

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    hahaha... may I recommend you focus on just a pictographic representation of this situation?
     
  13. wildbillbugman

    wildbillbugman Member

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    Guys,
    I know that I would have been the worlds most poor salesman. Maybe I should get a phonebook and start Cold-Calling.
    Bill
     
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  15. Andrew O'Neill

    Andrew O'Neill Subscriber

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    Thank you Bill and Holmburgers
     
  16. Photo Engineer

    Photo Engineer Subscriber

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    I may have located a source for custom dyes in custom quantities....

    Any interest?

    PE
     
  17. wildbillbugman

    wildbillbugman Member

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    Hello,
    Heck yes. I have still not received a final quote from H.W. Sands for 1.3g of SDA30057. They are the first company that I have ever ordered from who insisted on a "Formal Purchase Order".
    I finaly downloaded a generic P.O. from an internet legal co, at a price. My P.O.#(sands insisted on one) was 0001. They have gotten very officious since I last dealt with them.
    A couple of dyes come to mind. But I will go over my notes and give you specific Dyes in which I have inteerest.
    Its a long time 'til Easter and egg dying time. I could have the most expensive easter eggs in California!
    But,actualy, I am more interested in what you might have in mind for green and red sensitizing. And anti-halation is something I have never worried about yet.
     
  18. Hexavalent

    Hexavalent Subscriber

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    Of course I'm interested :tongue:

    Are 'standard' sensitizers available, or does 'custom' mean "name that molecule"?
     
  19. Photo Engineer

    Photo Engineer Subscriber

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    I have yet to get any information at all on this. And, Rome was not built in a day. It is going to take a while!

    PE
     
  20. Andrew O'Neill

    Andrew O'Neill Subscriber

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    I'm interested... especially IR dyes.
     
  21. CRhymer

    CRhymer Subscriber

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    Absolutely!

    Cheers,
    Clarence
     
  22. wildbillbugman

    wildbillbugman Member

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    PE,
    Speaking of Halation, is not the pupose of the yellow dye in Jim Browning's matrix emulsion anti-Halation? And that just brought to my mind-A yellow dye Could be a blue accelorater, could it not? But it might supress the green and Red senisizers.
    The legendary "panchromatic sensitizing dyes". Do you know enough about them to have one synthesized?
    Bill
     
  23. Photo Engineer

    Photo Engineer Subscriber

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    The yellow dye in Jim Browning's Matrix Film is not for halation. It is to limit penetration of light into the coating, which is exposed from the base, so that the image is sharp and limited to the base region. As the emulsion hardens in the tanning developer, it then adheres strongly to the base.

    As for dyes, I am investigating getting about 6 grams or so of 3 water soluble dyes.

    1. Green sensitive.
    2. Red sensitive.
    3. Pan sensitive.

    An IR dye may come later. This is due to the fact that IR dyes are on the Honeywell site.

    The dyes I select will not contain Se, nor will they be subject to "J" aggregation.

    More information in a few weeks.

    PE
     
  24. Andrew O'Neill

    Andrew O'Neill Subscriber

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    I emailed Honeywell about their IR dyes a few days, but no reply. Do they deal with individuals?
     
  25. wildbillbugman

    wildbillbugman Member

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    Andrew,
    Someone from Honeywell called me regaring my inquiry concerning KF576 S PINA, The emulsion capable of forming J aggrigates. She ask about quantity and I told her honestly, just a few grams. She said that she would speak to Manufacturng and get back to me. She has not.
    Bill
    I
     
  26. Andrew O'Neill

    Andrew O'Neill Subscriber

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    Thanks Bill. I guess we are just small fry. I'm in no hurry. I'll wait to see if PE comes up with something.