Physical and Chemical properties:
TEST ITEMS SPECIFICATION
APPEARANCE DARK RED POWDER
CONTENT OF Fe2O3 96% min
CONTENT OF SiO2+Al2O3 3%
PH VALUE 3-7
DENSITY 5.0 g/ml
SHADE CLOSE TO STANDARD
OIL ABSORPTION 24-28%
RESIDUE ON 320 MESH 0.008% max
WATER SOLUBLE 0.3% max
VOLATITE 1000° C 1.0% max
TINTING STRENGTH 98-102 %