Colorimetric Characterization of Pearlescent Coatings
Maria E. Nadal, Thomas A. Germer
This paper descirbes recent developments at the National Institution of Standards and Technology in the colorimetric characterization of pearlescent coatings. The goal of this research is to develop standard measurement protocols for the accurate color characterization of these coatings using an understanding of their scattering mechanism as a guide. The bi-directional reflectance of a series of samples, where the pearl coat and basecoat are different in color, have been measured for the visible region at incident angle of 15 , 25 , 45 , 65 , and 75 and viewing angles of 80 at 5 steps. This large ensemble of measurements show general trends that are being used to define a subset of measuring geometries that will provided a complete map of the scattering mechanisms present in pearlescent coatings.
Proceedings of the 9th Congress of the International Color Association