Experimental data of reflectance values of the paint in white, RW, and black, RB, backgrounds are used to calculate f. f is then used in the following equation to determine R∞, the highest reflectance achieved by increasing paint thickness With the knowledge of dry film thickness (t) of the paint, the scattering coefficients of the coating is calculated using a, b and RB from the following equation. KM parameters, a and b, are calculated using R∞ and the following equations Thereafter, hiding power (opacity) ...