Pigment carbon black is used for coloring in products such as ink, paint and coating products. The blackness of pigment carbon black is actually the reflectance of carbon black. It is often expressed as data measured by reflectance. The higher the blackness, the lower the reflectivity. The degree of blackness can also reflect the original particle size of carbon black. Generally, the higher the blackness of carbon black, the smaller the particle size. The volatile content of carbon black indicates the amount of oxygen-containing groups on the surface of carbon black, and reflects the physical, electrochemical, and application properties of carbon black. The characteristic value of the structure of carbon black and the degree of branching formed by the carbon black microparticle aggregates indicates the level of voids inside the carbon black, which is usually expressed by the oil absorption value.

So the dispersion of carbon black directly affects the blackness, hue and hiding ability of carbon black, and directly affects the use of pigment carbon black.
1, classification of carbon black for pigments
Internationally, according to the coloring ability of carbon black, it is usually divided into three categories, namely high pigment carbon black, medium pigment carbon black and low pigment carbon black. This classification system is usually represented by three English letters. The first two letters indicate the coloring ability, the last one indicates the production method

Example: High color channel black: HCC (high color channel)
CFHigh color furnace black HCF (high color furnace)

Classification of color-like pigments is mainly based on particle size and blackness. High pigmented black (10-14nm), medium pigmented black (15-27 nm), medium pigmented black (17-27 nm), low pigmented black (28-70 nm)