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Property and usage:
The granular indigo is processed by spray drying the slurry of acid washing indigo with additive, it has advantages of:
Free of dust or little flying dust. The granules have certain mechanical strength, and don' t create dust easily, so it can improve the working environment and sanitary condition.
Good flowability, which is beneficial to the automatic measuring and operation.
Good wettability and dispersibility, don' t agglomerate or aggregate in use, and is convenient for preparing dye liquor.
Good storage stability, and don' t absorb moisture easily, and has not electrostatic adsorption phenomenon.
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 |
Content | ≥ 93.0%、94.0% |
Content | ≤ 1.0% |
Strength | equal to 100 percent of standard sample |
pH value | 8－9 |
Content of ferric ions, ppm | ≤ 300PPM |
Manufacturing
