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The refractive index, represented by the letter n, of a material describes how light propagates through and is bent by, that material. The magnitude of the refractive index, depending upon the electronic structure of the molecules, governs to what extent the path of light changes, when entering or leaving a material.

Particles in a matrix, like pigment particles surrounded by the binder system in a coating, ink or plastic, can change the propagation direction of light when the particles and the matrix have a different refractive index. This phenomenon, called scattering, results in both white color (provided that the particles do not absorb visible light) and the hiding power of the coating.

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A paint pigment factory is a bustling hub of precision and innovation, where the journey from mineral or chemical compound to finished product is a testament to human ingenuity. The primary function of these factories is to extract, refine, and blend pigments, which are the substances responsible for giving paint its color. These pigments can be natural, derived from sources like clay, earth, or plants, or synthetic, created through chemical processes.

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