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Optical Reflectance of Metallic Coatings: Effect of Aluminum Flake Orientation



Li Piin Sung, Maria E. Nadal, M E. McKnight, Egon Marx, B Laurenti


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.
Journal of Coatings Technology
No. 932


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


Sung, L. , Nadal, M. , McKnight, M. , Marx, E. and Laurenti, B. (2002), Optical Reflectance of Metallic Coatings: Effect of Aluminum Flake Orientation, Journal of Coatings Technology, [online], (Accessed June 20, 2024)


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Created September 1, 2002, Updated February 19, 2017