Modified Colorimetric Methods for the Graphic Arts

Current colorimetric methods are suitable in many industries for measuring and specifying the color of objects such as paper, paints and fabrics. However, the needs of graphic arts and photography, where color pictures must be reproduced from only three or four transparent colorants on a white base are very difficult. This paper shows how colorimetry can be used in the graphic arts from the standpoint of one experienced in both densitometry and colorimetry. Each system has advantages and disadvantages. Some practical modifications of colorimetric calculations and specifications will be shown. With the proper equipment and special software it is possible to generate Status T density and colorimetry from the same spectrophotometric measurement. This paper shows how colorimetry can be used in the graphic arts from the standpoint of one experienced in both densitometry and colorimetry. Each system has advantages and disadvantages. Some practical modifications of colorimetric calculations and specifications will be shown. With the proper equipment and special software it is possible to generate Status T density and colorimetry from the same spectrophotometric measurement.