Pigment Blacks for Paints

Thanks to its excellent properties, pigment black is the most frequently used black pigment in the paint and coatings industry. The following special behavior of these pigments makes it suitable for nearly all coatings applications, from deco systems to the highly sophisticated automotive topcoats  

One technical application parameter, which is important for evaluating the right quality for the right application, is the average primary particle size, expressed in nanometers or microns. A second parameter is the surface chemistry expressed in the value of volatile matter determined by 7 min at 950 °C in % (DIN 52552). 

Because of their small particle size and their resulting large surface area, pigment blacks are classed as pigments, which are more difficult to disperse. Depending on the supplied form, pigment blacks can be dispersed with all grinding machines, for example sand mill, pearl mill, ball mill, triple roll mill and others. 

Of decisive importance for the efficiency of dispersion is the formulation of the mill base of a coating, which must be composed differently for the various dispersing machines. Depending on the wetting properties of the resin, the preferred binder concentration used is 30-50% and the pigment black concentration, calculated on 

Coloristic properties of pigment blacks as function of the primary particle size. 

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