A while back I found a formula in a 1934 book on infrared photography to sensitize over-the-counter plates (Agfa, Ilford, and others) to infrared spectra. The plates did not come with infrared sensitivity. So my question is does anyone know if this will work with modern film emulsions? Here, for reference, is the formula:
For Cryptocyanine (Kryptocyanine)
1 part in 10,000 solution of methyl alcohol (1cc)
Industrial spirit [ethanol, I think] (165cc)
Distilled water to make 500cc.
Bathe plates for 3 minutes in the solution
Dry in a current of cold air
I found the ingredients at Sigma-Alrdich (http://www.sigmaaldrich.com/catalog/...g=en®ion=US) for a reasonable cost, but cryptocyanine is not a chemical that I'd be comfortable storing in my apartment, so I've not yet gotten any because the smallest size is 250mg, enough to last me a lifetime of sensitizing film.
Users here seem pretty up on the scientific side of this, so I thought this might be a good forum to ask about this.
David
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