* Hiding power refers to the ability of the color paint to be evenly coated on the surface of the object and cover the base color of the surface of the coated substrate. The black and white grid test is often used, and the minimum amount of paint used to cover the background color per unit area is expressed in g/m2.
*The hiding power of paint depends on the degree of scattering and absorption of light by the pigment, and is also related to the refractive index between the pigment and the substrate.
* For white paint and light paint, a reflectance meter can also be used to measure the ratio of the reflectance of dry films of different thicknesses on blackboards and whiteboards, that is, the contrast ratio. When the contrast ratio is equal to 0.98, it is considered that the coating film of this thickness is completely covered, and the hiding power can be .
