Ultramarine Blue is an inorganic pigment, a pigment indexing system ranked Pigment Blue 29 . The chemical structure of the silicoaluminophosphate , is an artificial lapis pigments . Ultramarine has a clean , bright and was blue red phase , which makes the blue pigment ultramarine blue is different from the market with a unique appeal . In addition , due to the ultramarine has a very unique red - blue phase , so excellent weakened and correction yellow shade , and ultramarine does not result in the use of metamerism phenomenon . Its whitening effect effect is significant in many applications (including plastics, paints , detergents , etc.) . Ultramarine blueblue chromatography occupy a unique position , it is the other pigments can not be replaced and get it mixed method unique hue .
Since titanium dioxide is the reflectance of the incident light is not 100 , in particular spectral wavelength of the blue , violet end , high light absorption rate and therefore it is not a pure white , but with a yellowish hue . Mixed complementary shade of blue colored light and yellow light white . This is with the characteristics of ultramarine blue , ultramarine blue for white products can eliminate yellow whitening effect . From the visual sense in terms of the people , with a blue tint is whiter than white with a yellow hue . Therefore , within certain limits , increasing the saturation of the blue ( refers to the purity of color ) can be achieved whitening feeling . It is also used to improve the theoretical basis of the plastic products whiteness .
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