- Author
- Sung, L. P. | Nadal, M. E. | McKnight, M. E. | Marx, E. | Laurenti, B.
- Title
- Optical Reflectance of Metallic Coatings: Effect of Aluminum Flack Orientation.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD Eckart America, Louisville, KY
- Journal
- Journal of Coatings Technology, Vol. 74, No. 932, 55-63, September 2002
- Keywords
- metallic coatings | coatings | 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.