Details:
Summary:
During the past year the Lithographic Technical Foundation investigated the present status of color control in lithographic printing. Several surveys of commercial runs were made, involving wet and dry color measurements of sheets picked at intervals during each run. The measurements were made with the Hunter Color and Color Difference Meter and the Photovolt Reflection Meter. The data on variations throughout the run indicate the control which can reasonably be expected in printing solid colors and is a preliminary guide to the setting of minimum color tolerances, subject to the experience of other investigators. The study of the variations over in sheets showed that certain patterns might exist during each run, but revealed no basic pattern for all runs. The extent of color change upon drying was also measured.