Property and usage
The granular indigo is processed by spray drying the slurry of acid washing indigo with additive, it has advantages of:
1)Free of dust or litter flying dust. The granules have certain mechanical strength, and don\'t create dust easily, so it can improve the environment and sanitary condition.
2)Good flowability, which is beneficial to the automatic measuring and operation.
3)Good wettability and dispersibility, don\'t agglomerate or aggregate in use, and is conveninet for preparing dye liquor.
4)Good storage stability, and don\'t absorb moisture easily, and has not electrostatic adsorption phenomenon.
5)It can also ensure the homogenic color and brilliant color light in printing and dyeing.
Quality Index
Appearance:Homogenic dark blue granules
Color light:similar as the standard sample
Strength，%：equal头100 percent of standard sample
Content, %≥93.0, 94.0
Moisture content, %≤1.0
PH value：8-9
Content of ferric ions, ppm:≤300
