In this research we present results of the studying and calculating the optically active
range depth for diffuse light reflected coating at change of the dispersiveness of pigment
grains used in coating and wavelength of incident electromagnetic ra
diation. This coating
consists of zinc oxide powder and organic material that acts as a binding film. The size of
zinc oxide powder grains were changed between 0.2 μm and 10 μm. In addition, the depths
of optically active range of diffuse light reflected coating were calculated when the
absorption coefficient of the pigment used in the ZnO/binder coating changed between
-1 0.1cm and -1 1000cm . The obtained results allow us optimization of the diffuse light
reflecting coatings thickness at preparation determined kinds of them.
