I. Introduction ultrafine powder is a transparent non-metallic minerals, high transparency, good whiteness, refraction 1.54, density 2.3, 28 oil absorption, non-toxic, tasteless, acid corrosion. Having high transparency, the refractive index of the filling material itself, the majority of the synthetic resin with a refractive index very close to, the amount of filler does not affect the transparency of the fill of the finished product, the surface smoothness can be improved scratch resistance and wear products, low oil , filled with large, help to reduce the manufacturing cost of the product. Second, the related technical parameters Specifications measurement items Ky-8619 Ky-8629 Ky-8639 SiO2 silica% ≤ 65 70 75 MgO MgO% ≤ 12 12 12 Al2O3 Alumina% ≤ 10 10 10 Whiteness Whiteness% ≥ 94 95 95 Oil Absorption Oil absorption (ml / 100g) 26-30 26-30 26-30 Specific Gravity gravity (t / m3) 2.7 2.7 2.7 PH Value PH value 7-8 7-8 7-8 Volatility volatility (containing crystalline water)% ≤ 1.85 1.85 1.85 Particle Size particle size D97 (μm) ≤ 6 4 2 Appearance Appearance White powder White powder White powder Specification measurement project activity transparent powder silica% ≤ 75 MgO SiO2 MgO% ≤ 12 Al2O3 trioxide Al% ≤ 10 Whiteness Whiteness% ≥ 95 Oil Absorption Oil absorption (ml / 100g) 12-20 Specific Gravity gravity (t / m3) 2.7 PH Value PH 7-8 Volatility volatile value (including crystalline water)% ≤ 1.85 Particle Size particle diameter D97 (μm) ≤ 2 Mobility Extent of Activation% 95 Appearance Appearance white powder Third, the product with the use of conventional ultrafine transparent powder filler contrast, high transparency, high hardness, low oil absorption, is easily dispersed, stable and other characteristics. High Transparency: filler itself and the refractive index of the refractive index is very close to the majority of the synthetic resin, so that the filling amount of the filler does not affect the transparency of the finished product. High hardness: the product can improve the surface smoothness and scratch resistant properties. LOW OIL: help to reduce the manufacturing cost of the product. Ease of dispersion: a variety of resin has good wetting, adsorption performance, easy to disperse. Strong stability: excellent weather resistance and excellent corrosion resistance. Applies to: Transparent masterbatch, rubber, paint industry, stearic acid salts, transparent acid salts, transparent silicone, transparent glass, plastic and other industries