Print Quality Evaluation in Paperboard Printing Induced by Changes in Viscosity and Screen Parameters

Abstract

Newer offset printing technologies demand improved rheological properties of inks ensuring predictable printability and runnability. The printing performance of printing technology is a function of raw materials, namely ink and substrate. Interaction between ink and surface of substrate influence densitometric quantities of printed layer. The consistent performance of ink is a function of its rheological properties mainly viscosity. Substrate surface properties such as smoothness, whiteness and color are critical for printability. This paper attempts to analyse variance in percent tone value on print on paperboard by conducting experiments involving three levels each of dot shape and screen ruling. Experiments also yielded a relationship between viscosity and percent tone value increase.