The object is to make the color pigments in paint dyed material. Pigments soluble and insoluble, there is the difference between inorganic and organic. Inorganic pigments are generally mineral substances, humans have long known that the use of inorganic pigments, the use of colored soil and minerals, body painting and painting on the wall. Organic pigments are generally derived from plants and marine animals, such as Sin blue, Garcinia and Roman purple extracted from shellfish.
Internal substances absorb energy in some way,photoluminescent sheet to convert it into light radiation (non-equilibrium radiation) is called light; in practical applications, will be excited to emit light by the external solid called luminescent material. They can form a powder, crystal, film or crystal and other uses, the main component is a rare earth metal compounds and semiconductor materials, very close relationship with the non-ferrous metals.
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