Application of multi-flux theory based on Mie scattering to the problem ofmodeling the optical characteristics of colored pigmented paint films

Multi-flux theory for multiple scattering calculations in pigmented/protect ive coating is described Performance evaluation of the theory is made by co mparing theoretically computed reflectance M with experimentally measured o nes for selected wavelengths for three different paint samples. Diffuse ref lectance spectra for hypothetical particulate systems in visible spectral r ange are generated through computer calculations. Effect of variation in av erage pigment size and pigment size distribution on reflectance spectra is studied. Overall thrust of morphological characteristics of pigments on the color exhibited by paint dispersion is studied by calculating CIE color an d color-difference parameters of particulate systems. Results show that a v ery complex relationship exists bern rm the morphological characteristics o f pigments and color exhibited by the system. The outcome of the study is i mportant for applications in paint, coating, and plastic industries. (C) 20 00 John Wiley & Sons, Inc.