Characteristics of pearl pigment:
Number Test items Standard
1 Bulk density g/cm3 0.13-0.35
2 Particle diameter distribution % Particle proportion within nominal grain diameter range > 92%
3 Water content % < 0.2
4 Oil absorption,g/100g 60-90
5 Dispersed phase Even dispersal,without flock in the water;pigment particles are in even dispersal without over lap under the microscope.
6 TiO2 content ( dry basis ) % 0-68
7 Fe2O3 content ( dry basis ) % 0-65
8 PH value 6-9
9 Hydrotrope % < 0.3
Content of heavy metal is in conformity with the standards of France and ltaly :
1 lead < 0.010%
2 Arsenic < 0.005%
3 Mercury < 0.005%
4 Cadmium < 0.010%
5 Selenium < 0.010%
6 Barium < 0.010%
Number Test items Standard
1 Bulk density g/cm3 0.13-0.35
2 Particle diameter distribution % Particle proportion within nominal grain diameter range > 92%
3 Water content % < 0.2
4 Oil absorption,g/100g 60-90
5 Dispersed phase Even dispersal,without flock in the water;pigment particles are in even dispersal without over lap under the microscope.
6 TiO2 content ( dry basis ) % 0-68
7 Fe2O3 content ( dry basis ) % 0-65
8 PH value 6-9
9 Hydrotrope % < 0.3
Content of heavy metal is in conformity with the standards of France and ltaly :
1 lead < 0.010%
2 Arsenic < 0.005%
3 Mercury < 0.005%
4 Cadmium < 0.010%
5 Selenium < 0.010%
6 Barium < 0.010%