Paper coating compsn - comprising calcium carbonate of two particle sizes

摘要

Compsn. consists of an aq. dispersion of pigment contg. a binder, the pigments being a mixt. of (a) 60-90% wt. of a pigment comprising CaCO3, with mean equivalent diameter of >=3 mu and (b) 10-40% of a pigment comprising CaCO3, whose mean diameter is 0.06-0.08 mu. The compsn. provides a mat coating.