THE INSTITUTE OF PHOTOGRAPHIC TECHNOLOGY
1st March 1946Page 146 - Vol. 53 No. 3 The Australasian Photographic Review
THE INSTITUTE OF PHOTOGRAPHIC TECHNOLOGY
The first 1946 regular monthly meeting was held at Melbourne on the 7th March.
A combined address on “Post-War Advancements in Photography” was delivered by Messrs. E. Teasdale and L. Wells, of Kodak.
Teasdale’s subject was “Emulsions”, and after outlining the most recent electron theory on latent image formation, he described how modern emulsion technique takes into consideration the very latest discoveries relating to the reduction of the silver bromide to metallic silver. He indicated how the successful conclusion of experimental work on the effect of gelatine on the characteristics of photographic emulsions had led to the development of new types of super-speed emulsions, one of which—Super Panchro Press Sports Type (the fastest negative emulsion in the world to-day) — is now in the course of being introduced to the Australian “Press” market.
Following Mr. Teasdale, Mr. Wells briefly discussed some important characteristics of the new developers and accessory solutions now becoming available to photographers. The value of anti-foggants, wetting agents, etc., was touched upon.
Mr. Wells then discussed the physical nature of a number of modern local and overseas color processes, including Kodachrome, Minicolor, Kotavachrome, Kodacolor, and the Kodak Dye Transfer Process. The mechanics of dye coupling, as it applied to the first of these four processes, was outlined, and examples were displayed. Kodacolor, the new negative-positive color process, was explained, and finally with sets of matrices the new Kodak Dye Transfer Process for making full color prints from separation negatives was explained.