Coating hiding power and its influencing factors. Coating hiding power refers to its ability to cover the surface under the coating, which is determined by the scattering and absorption properties of the pigment. Black paint has a higher hiding power due to the absorption of carbon black, while white paint mainly relies on the scattering of pigments. Coating pigment refractive index differences, particle size, volume concentration and dispersion all affect its hiding power performance. Methods for measuring Coating hiding power include visual method and instrument photoelectric reflectance method, among which Dry-Film method is more commonly used. By measuring the reflection of Dry-Film by contrast ratio method, the ability of Coating to achieve complete covering can be evaluated. In practical applications, considering different Coatings and national conditions, the comprehensive use of wet-film and Dry-Film measurement methods can more accurately evaluate the covering performance of latex paints and avoid the use of low-mass products.