Report of the Color Committee

The Eastman perforation, although adopted by the Society as a standard for positive and negative film, has certain disadvantages for use in connection with color processes and for background projection. The reasons for these limitations are analyzed, and a proposal is made that the important advantages of the Eastman filleted rectangular shape be retained in a perforation, the dimensions of which are the same as those of the Bell & Howell perforation. Such a perforation would fit existing Bell & Howell registering pins. — The use of a photocell having most of its sensitivity outside the visible spectral region imposes an added burden to those working upon color sound processes. Search is urged for a cell that would have all the advantages of existing caesium cells but with its chief sensitive response in the visible range. — The term “Direct Color Developer Process” is recommended for a color process wherein non-diffusing color-formers in the emulsion (multiple-layer) combine with the oxidation products of the developer to form insoluble dyes. A process of this type was introduced recently by Agfa.

Print ISSN
Published
1937-07
Content type
Information
DOI
10.5594/J08512
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