Directional reflectance curves measured from acrylic pile fabric of various luster levels by means of the Hunter Model D-10 Recording Goniophotometer were subjected to detailed examination and analysis. The relationship of various luster-related curve properties to fabric and fiber characteristics was examined. A statistical curve-analysis technique is shown to produce the disperison index and kurtosis index, parameters which are useful for further quantization of directional reflectance curves. Dispersion index values are related to uniformity of pile lay, straightness of fibers, and basic fiber luster. Kurtosis index gives values related to "sharpness" of the luster.
American Society for Testing and Materials , "Goniophotometry of Reflecting Objects and Materials ," ASTM Method E167-63.
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Hunter, R.L. , High Resolution Goniophotometer and Its Use to Measure Appearance Properties and Light-Scattering Phenomena, In Modern Aspects of Reflectance Spectroscopy, W. W. Wendlandt, Editor, New York, Plenum Press, 1968, pp. 226-241.
