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Andrew O'Neill
12-27-2013, 05:53 PM
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?

Andrew O'Neill
12-27-2013, 06:02 PM
I wonder how well this would work...
http://www.sigmaaldrich.com/catalog/product/aldrich/392375?lang=fr&region=CA

1g=$93CDN

Photo Engineer
12-27-2013, 06:11 PM
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

Andrew O'Neill
12-27-2013, 07:27 PM
Yes, you have, PE. Thank you. I was just curious.

Photo Engineer
12-27-2013, 09:41 PM
Try Sands Corporation of Titusville FL.

PE

Athiril
12-28-2013, 05:56 AM
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

ME Super
12-28-2013, 09:52 AM
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.

Andrew O'Neill
12-28-2013, 03:28 PM
Not sure where one could easily source chlorophyll F.

kb3lms
01-07-2014, 07:56 PM
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

Photo Engineer
01-07-2014, 09:57 PM
Jason, IIRC, it is the metal free varieties.

PE