ASTM D4086 – Standard Practice for Visual Evaluation of Metamerism
Description:
Significance and Use
4.1 Metameric color matches result from the use of different colorants (pigments, dyes, and the like) in achieving the same color match. Usually, the purchaser requires that the color match be nonmetameric; this practice permits this requirement to be quickly tested in both field and laboratory. Where nonmetameric matches are not possible or practicable, for cost or other reasons, some limitation of metamerism may be required. The procedures for estimating the magnitude of metamerism described in this practice provide methods for assessing the effectiveness of such limitation.
Scope
1.1 This practice describes visual methods for detecting metamerism and for estimating the magnitude of a metameric color difference.
1.2 The practice is limited to the consideration of illuminant metamerism and observer metamerism. This practice does not cover gonioapparent samples.
1.3 This practice does not provide for the computation of indices of metamerism based upon instrumental measurement of spectral characteristics.
ASTM D4084