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Effect of Aluminum Flake Orientation on Coating Appearance.


pdf icon Effect of Aluminum Flake Orientation on Coating Appearance. (1118 K)
Sung, L. P.; Nadal, M. E.; McKnight, M. E.; Marx, E.; Dutruc-Rosset, R.; Laurenti, B.

Annual Meeting, 79th. Federation of Societies for Coatings Technology Meeting Technical Program. Federation of Societies for Coatings Technology (FSCT ICE) Meeting. Proceedings. November 5-7, 2001, Atlanta, GA, 1-15 pp, 2001.

Keywords:

coatings; aluminum; appearance; confocal microscopy; flake orientation; optical reflectance; pigmented coatings; ray scattering model

Abstract:

The orientation of platelet-like pigments in coatings is affected by the processing conditions resulting in appearance variations of the final product. A set of aluminum-flake pigmented coatings having different flake orientations was pre-pared using various spray conditions. The orientations of individual flakes were determined using laser scanning confocal microscopy. The orientation distribution was then used as input to a ray scattering model to calculate the optical reflectance of these coatings. The pigment orientation distributions and the measured optical reflectance as a function of scattering angle will be presented and the latter will be compared to the calculated reflectance.