The whiteness of the mica is probably how many?
Whiteness indicates the degree of white on the surface of the material, expressed as a percentage of the white content. Determination of whiteness is usually to Magnesium Oxide as the standard white 100%, and set it as the standard to 100% reflectance, reflectance percentage of blue light Magnesium Oxide standard plate surface to represent samples of blue white; with red, green and blue three color or three light sources measured three values, the average value is three white light degree. The higher the reflectivity, the higher the whiteness, and vice versa.
The mica powder is a kind of layered silicate structure consists of two layers of silicon oxygen tetrahedron with silicon oxygen compound layer to form a layer of aluminum eight surface body. Can cut cleavage completely, thin sheet, sheet thickness up to 1 m (in theory can be cut into 0.001 m), large radius thickness ratio; mica crystal chemical formula: K0.5-1 (Al, Fe, Mg) 2 (SiAl) 4O10 (OH) after 2 nH2O, the general chemical composition: SiO2: 43.13-49.04%, Al2O3: 27.93-37.44%, K2O+Na2O: 9-11%, H2O: 4.13-6.12%.
Mica whiteness is not high, is probably around 75.Mica powder is a non-metallic mineral, which contains many kinds of ingredients, including SiO 2, the content is generally around 49%, and the content of Al 2, O 3 is about 30%.
