- 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.