Metamerism Assessment and Illuminant Dependency
topic
Metamerism index calculation quantifies the degree to which two textile specimens with visually matching colour under one illuminant show colour difference under a second illuminant by computing CIELAB delta-E between specimen pairs under reference and test illuminants, with daylight D65, incandescent A, and fluorescent F11 metameric index values characterising the commercial importance of the metamerism.
Role
Identifies dye recipe combinations that appear colour matched under one light source but show unacceptable colour differences under other commercially relevant illuminants, guiding dye recipe reformulation toward illuminant-insensitive colour matches that will appear consistent in the diverse lighting environments encountered in retail, domestic, and outdoor textile use.
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