Characteristic
Dark blue and light blue powder, bright colors, tinting power, covering power is slightly worse. The powder is hard. Quality standard: the coloring of 95~105% absorption 15-30% 1% water, residue on sieve (200 mesh) is less than 1%, 1% water soluble substances.
Iron blue tinting power, light fastness, alkali resistance is poor, heat resistance is higher, more than 150 degrees above the temperature loss of crystal water, began to decompose into red pigment
|
Item |
Blue |
|
Content % |
>90% |
|
Oil absorption ml/100g |
25-35 |
|
Res.on 325 mesh % |
≤0.3 |
|
Water soluble salts % |
≤2.5 |
|
Moisture % |
≤1.0 |
|
PH value |
≥6.0 |
|
Tamped apparent density g/cm3 |
0.4-0.8 |
|
Particle Shape |
Irregular |
|
Tinting Strength % |
95~105 |
|
Color Difference △E |
≤1.0 |
