COLOR PHOTOGRAPHS.

Oamaru Mail, Volume XL, Issue 12541, 12 May 1915, Page 3

COLOR PHOTOGRAPHS.

Some' examples of " Kodachrome." a. new process of photography in colours, were shown at the Hoyal Photographic Society (says "The Times"). The process is the'discovery of Mr Kenneth Mees, an Englishman, living in the United States. The new method consists in exposing two plates, sensitised for all colours, either simultaneously or in quick succession, one through a, red filter, the other through a .green filter. The plates are developed and fixed' in the usual manner, after which the black silver forming the image is removed by simple chemical means. The. plates are then dyed—that taken through the red filter in "a green dye. and that taken through the green filter in a aed dye. The plates take up the dyes in inverse proportion to the original silver deposit. They are then brought face to face and bound up in register, the combination of the two-colour images by transmitted light giving a reproduction of tinoriginal, "in the portraits shown the flesh tints were especially well rendered, and the absence of the screen rulings and dots j of the usual three-colour process uudoubt I edly .adds to the effect. From the com mercial point of view, flic most important factor is that any number of copies can be reproduced from the original pair of negatives. In that case the original negatives are preserved as negatives, master glass positives being made from them by contact in the usual way. and from these the required number of negative duplicates. It is also claimed that the process only adds two very simple operations to the ordinary method of dealing with a photographic plate—namely, the bleaching and dyeing: and also (hat it has the fundamental advantage that the plates can he ■ retouched, etched, and air-brushed, thus giving.the artistic, opeiator full scope for his abilities.