The present work consists in developing a procedure which will allow to compare gloss values obtained from angularly and spectrally resolved Bidirectional Reflectance Distribution Function (BRDF) measurements and gloss values measured with a national reference goniophotometer. The gloss measurements will be performed on the Reference Goniophotometer for Specular Gloss Calibration available at the Sensor Science Division of the National Institute for Standards and Technology (NIST), whereas the BRDF measurements will be conducted on the Five-Axis Goniometer for Color & Appearance also available at the same division of NIST.