Quote Originally Posted by Photo Engineer View Post
On the topic of dye bleach.......

Henry Wilhelm knows nothing about DB vs Chromogenic materials. The DB process is much more dangerous to use than any chromogenic prcess. DB materials were never possible to prepare with real camera speeds. It would take a family of shiftable dyes to make this possible. And finally, the grain in DB is at its maximum in medium to low density areas making the images you do get rather unpleasant. Kodak had a DB print process ready to go and its introduction date was 8 Dec 1941. It was called Azochrome.

THanks for clarifying PE.
So DB was more inconvenient and dangerous (the bleach). And I can imagine that the commonality of Chromogenic between film and print materials were more economic on R&D and production due to commonality.
Also, as of quality of image and longevity; Current Chromogenic material must be quite advanced. I wonder if much R&D is put into it, even if RA4 paper the most used and produced of the family of photographic processes. Many claims of inkjet (pigment inks) being better, but that is out of this forum and photographic process scopes...

Back to topic. As of retrieving the PDF data, isn't there any contact at Kodak, ex-Kodak, labs, that have the information?
The OZ EK retiree of the coating machine was trying to do some color, words about kodachrome were spread and nothing since.
Probably there is a few people interested in it but out of internet's reach (thinking of the latter). I do recall PE saying that many of his colleagues weren't interested anymore but perhaps there are a few around who could be with a little push.