ASTM D 1729 - 96 (Reapproved 2003) Standard Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials

American Society for Testing and Materials (ASTM). Current edition approved Dec. 1, 2003. Published December 2003. Originally approved in 1960. Last previous edition approved in 1996 as D 1729 – 96. 4 p. This practice specifies the equipment and procedures for visual appraisal of the colors and color differences of opaque materials that are diffusely illuminated. These specification are of critical importance in color matching. This practice requires judgments by observers with normal color vision.