Properties:This is blue powder and insoluble in water. This product can eliminate and remove the yellow light in painting and other materials with the properties of anti-alkali and high temperature resistance. This product is typically stable in the air, sunshine, wind and rain. appearance:vivid blue powder 1.color(compared with standard sample):near 2.Tinting strength(compared with standard sample):100±5 3.Free sulfur,%:0.10-0.30 4.Sieve residue(325mesh),%¡Ü:0.10-0.50 5.Oil absorption,%:25-45 6.solute in water,%:1.50 7.moisture,%:1.00