How to choose the price of carbon black, the blackness and hue of carbon black?
Jun 24, 2022
How to choose the blackness and hue of carbon black? The blackness of carbon black also reflects the original particle size of the pigment carbon black in most cases, and is one of the important parameters to measure the market price of the pigment carbon black. The color of carbon black has a certain relationship with the size of the particles, the surface structure of the particles and the number of components of the adsorbed volatile substances. The blackness and brightness of carbon black often depend on its high dispersion performance as a prerequisite, otherwise, the blackness and brightness of carbon black with fine particle size cannot be displayed.
The color of carbon black in the dry state is inconsistent with the color dispersed in the paint, because the blackness of carbon black has a great relationship with its dispersibility. To compare the blackness, carbon black must be dispersed in the paint base to make a color paste, then matched with a color paint, and then made into a coating test piece for comparison.
Color is also one of the important indicators relative to the applied carbon black. Usually, the hue of carbon black is formed by three primary colors, namely red, yellow and blue, which are mainly adjusted for the color of processed products. Lamp black and furnace black have a very pronounced blue hue. When deploying gray paint, use furnace black more.
The absorbance of fine particle carbon black is higher than that of coarse particle carbon black, so the tinting strength is stronger. The structure of carbon black is the form of carbon black aggregates. Generally, the more branches, the denser the structure, the higher the structure, and vice versa, the lower the structure. High structure, good dispersion performance and strong covering ability.
