Goniophotometry and Goniochromatic Textile Measurement
topic
Goniophotometric measurement of textile surface colour at multiple illumination and viewing angle combinations characterises angle-dependent colour variation in metallic, iridescent, and pearlescent effect fabrics, quantifying the flip-flop colour shift between face-on and oblique viewing that defines the commercial effect value and the directional gloss contribution to fabric surface appearance.
Role
Provides the multi-angle colour measurement data needed to specify, reproduce, and quality control optically complex textile surface effects including woven lurex, coated metallic yarns, interference pigment prints, and surface-embossed fabrics whose appearance changes with viewing angle and cannot be characterised by conventional single-angle spectrophotometric measurement.