The Requirements of a Color Control Instrument.

Production of uniform color in industry is beset with many difficulties, not the least of which is the control method employed. Visual examination by trained inspectors has been the time-honored method, but recently there has been considerable activity in the field of instrumentation for color control. It has therefore become most desirable to examine the minimum requirements of a color control instrument so that color control difficulties about which some experience has been gained over a period of years are not replaced by instrumental difficulties which may be equally offensive and not so well understood.