Effect of Aluminum Flake Orientation on Coating Appearance.
Effect of Aluminum Flake Orientation on Coating
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.
coatings; aluminum; appearance; confocal microscopy;
flake orientation; optical reflectance; pigmented
coatings; ray scattering model
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.