Effect Of Kaolin Addition To Calcium Carbonate Precoats: Part 2: MSP Coating, 2004 Coating and Graphic Arts Conference
The use of engineered ground calcium carbonate (GCC) in precoating of woodfree paper is one way of achieving
higher optical performance. However, relative to a standard coarse GCC, lower coating solids must be used. The
runnability on a metered size press (MSP) coater of a coarse, a fine and an engineered GCC have been compared,
both on their own and with several kaolins. Different kaolins can give various improvements, such as good optical
performance, better coverage of the base paper, increased runnable solids and a smoother coating layer.