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US6156115A Multilayer interference pigment with transparent central layer 失效
多层干涉颜料与透明中心层

Multilayer interference pigment with transparent central layer
Abstract:
Multilayer interference pigment consisting of a central layer of a transparent or semitransparent material of low refractive index and alternating layers of a metal or of a material of high refractive index and of a material of low refractive index either side of the central layer, the material of low refractive index preferably being magnesium fluoride or acrylate and the metal preferably being aluminium or chromium.
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