... tinting strength, easy dispersibility, excellent light fastness and perfect weather resistance. It is extensively used in concrete, roofing tile, paver, stucco, masonary ... compiled.Instructions for use:Used in cement, iron black ratio is 2 ~ 4%. Adequate mixing. Product Name: Iron Oxide Black ... )15 ~ 2520pH,5.0 ~ 8.07.5Color strength,%100 ± 5100Conclusion: This product is eligible. Iron oxide black