5 декабря, 2015 
Pokraskin The printing ink industry places many requirements on pigment blacks. Several properties are expected for pigment blacks, both in printing inks and for the printed products. Printing inks: good wettability, easily dispersible, high concentration, optimum viscosity, good flow characteristics, storage stability, and economy. Printed products: jetness, hiding power, blue hue, gloss, rub resistance.
The use of suitable pigment blacks makes it possible to achieve various effects:
Dyeing, tinting
Almost 100% of the pigment black applications in the printing ink industry involve the “dyeing” of black inks. Pigment blacks are also used to tint gray and colored inks (brown, olive, etc.), but this amount is relatively small compared with the entire consumption.
Dyeing, thickening
Bearing in mind the effects which may be achieved by pigment blacks in printing inks, one can distinguish between the color giving (inking) component and the rheological
component. The inking component comprises jetness, undertone and gloss, whereas the rheological component includes the parameters viscosity flow properties and tack.
Color density, undertone
The inking component depends largely on the particle size of the pigment black. The finer the particle size of the pigment black, the higher the color density or jetness of the printing ink:
Decreasing the particle size, increasing jetness and brown undertone Increasing the particle size, decreasing jetness and bluer undertone
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