1. Properties:
         The goods mainly from the igneous rock, the rock Shuicheng Yan, and other natural weathering from decomposition. To Qianhui to pale yellow powder, a hexagonal flake crystalline particles. At room temperature or slightly acetic acid dissolved in hydrochloric acid. 

2. Physics analysis:
                 1. YF-400: Flake-yellow powder; YF-500: yellow-round flaky powder.
                 2. Whiteness: YF-400: 84.5 with 0.5; YF-500: 89 with 0.5
                 3. Surface treatment after the fineness: YF-500: 3.8u disabilities 0.1 (surface treatment before the fineness 4.5)
                 4. Moisture: 0.6 below.
                 5. PH value :6.7-7.6
                 6. Range of: YF-400 :45-55 YF-500 :50-60
                 7. Loss on Ignition :13-14
                 8. Refractive index: 1.58
                 9. True proportion: 2.6 

3. Purposes:
         Applicable to high-grade paint, coatings, inks, rubber, plastic, wire and cable, and so on. 

4. Features:
         Crystal has a good, high purity, particle size small, oil-absorbing capacity moderate, cover-rate, the advantages of decentralization and good, in the compound easily dispersed, easy processing, rubber surface smooth, with silica and carbon black to use when in Compound dispersed.