solutions for latex paint formulations, food-grade titanium dioxide, white pigment. It has extremely high opacity, which is a fundamental property of superior white pigments. Its opacity mainly depends on its refractive index and particle size, and its optical nature is caused by the difference in refractive index between the pigment and the surrounding medium. When the refractive index of the pigment is equal to that of the base material, it is transparent. The greater the difference in refractive indices between the two, the higher the opacity. Opacity is related to the particle size distribution of pigments.

Refractive index The refractive index of titanium dioxide is even higher than that of diamond. Its luster and brightness exceed those of diamond, but its hardness is inferior to that of diamond. Therefore, its application value is not high.

Scattering force The scattering of light, also known as diffuse reflection, is one of the important physical properties of white pigment and also an important optical effect of white pigment ----- Physical cause of tinting strength and covering power.

Scattering mainly includes reflection, refraction and diffraction. The relationship between the scattering ability R of light and the refractive indices of the pigment n2 and the base material n1 is: R=[(n2-n1)/(n2+n1)]2. The scattering force is also related to the particle size and dispersibility.

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