ASTM E 313 - 05 Standard Practice for Calculating Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates

American Society for Testing and Materials (ASTM). Current edition approved Oct. 1, 2005. Published October 2005. Originally approved in 1967. Last previous edition approved in 2000 as E 313 – 00. 6 p. This practice provides numbers that correlate with visual ratings of yellowness or whiteness of white and nearwhite or colorless object-color specimens, viewed in daylight by an observer with normal color vision. White textiles, paints, and plastics are a few of the materials that can be described by the indices of yellowness or whiteness calculated by this practice.