The iron oxide black pigment produced by Shaoyang Zhongcai Manufacturing Co., Ltd. is a blue black powder that is insoluble in water and alcohol, but soluble in concentrated and hot strong acids. It has magnetism, high coloring and covering power. It has good weather resistance, light resistance, atmospheric resistance, durability, water permeability and oil permeability. Good alkali resistance, heat-resistant to 100 ℃. Widely used for coloring building materials, cement, rubber, plastic, etc., with stable color, strong coloring power, and reliable quality. 1. Product Overview: Formula Fe2O3FeO, with a saturated blue-black ink light-colored, strong, high hiding power, light-fastness is good. 2. Specifications Model: 722/723. 3. Usage: widely used in colored cement, bricks, paint, paints, building materials, rubber, plastics and other fields. 4. Storage conditions: store in a dry place without rendering damp, avoid high temperature and with the acid-base complex isolation. According to the above storage conditions, unpackaged products effective storage period of six years. 5. Packing: 25 /20kg / bag, outer plastic inside compiled. 6. Instructions for use: Used in cement, iron black ratio is 2 ~ 4%. Adequate mixing. Test item The indicator Test results Fe3 O4 content% 90 95 Water% 1.0 0.8 Water-soluble matter,% 0.5 0.4 Sieve residue (325 mesh)% 0.5 0.3 Oil Absorption (ml/100g) 15 ~ 25 20 pH, 5.0 ~ 8.0 7.0 Color strength,% 100- 5 99 Conclusion: This product is eligible.