1.1This practice describes visual methods for detecting metamerism and for estimating the magnitude of a metameric color difference.

1.2The practice is limited to the consideration of illuminant metamerism and observer metamerism. This practice does not cover gonioapparent samples.

1.3This practice does not provide for the computation of indices of metamerism based upon instrumental measurement of spectral characteristics.

1.4This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.