Pigment blacks are electrically conductive as a function of their structure. The higher the structure, the better the conductivity of the pigment black. Electrically conductive printing inks are manufactured with special high-structured pigment blacks. Due to the special nature of these pigment blacks, conductive printing inks have a relatively high viscosity. In order to achieve good electrical conductivity on the printed article, it is an advantage to have a high pigment black concentration in the printing ink and a high inkfilm thickness when printing.
UV-application
UV curing printing inks are becoming more and more popular. However, black UV curing printing inks can only be a compromise, since pigment black strongly absorbs the incident light, both in the invisible and ultraviolet range. Hence, the blacker the printing ink, the greater the delay in curing. Special carbon blacks are available for this application.