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