A Color Densitometer for Subtractive Processes

In subtractive color processes it is desirable to have some type of sensitometry to tell how the process departs from correct rendering of neutral gray scales. Reading the density of a color deposit through an arbitrary filler does not give rise to a useful value in terms of the final color process. For practical use the “effective density” of a color is defined as the visual density produced by adding sufficient of the other colors of the process to produce gray. An instrument is described that reads such values directly. This instrument is capable also of analyzing the amounts of each of two or more colors when present simultaneously and permits the analysis of a sensitometric exposure into the corresponding deposits of each color. Complete sensitometric curves may he drawn for all the records from the readings of a single strip.

Print ISSN

0097-5834

Published

1938-08

Content type

Original Research

DOI

10.5594/J12948