[dwross]

Hi David,

Interesting research you're doing. I hope you've had luck getting additional info since you posted this, but in case not, I have a few bits.

Tadaaki Tani, in his book, Photographic Sensitivity, Oxford University Press, 1995, Section 6.3 on p 176, 'Gold Sensitization and Gold Latensification', states, "In collaboration with Mueller in 1936, Koslowsky discovered gold sensitization by the use of chloroauric acid and thiocyanate." Tani references R.Koslowsky, Z. Wiss. Photogr.,46, 65(1951), and F.W.H. Mueller, Photogr. Sci. Eng., 10,338(1966), along with the J.Opt.Soc.Am article you read.

Steigmann also did a lot of work with gold sensitization. Chasing down his publications (and he wrote a lot) might give you more info. I favor one of his gold brews in my negative emulsions.

The British Journal of Photography, 1945, p 333, describes Patent No. 570,393, of February 13, 1942, by Cecil Walker, Ronald Bernard Collins and Edward Cyril Dodd, all of 23, Roden Street, Ilford, Essex: "Gold Salts in Light-Sensitive Emulsions". I have that journal volume in my library, and I can copy p.333 if you don't have access to it.

Best,
d