| 摘要 |
<p>A high opacity, high light scattering filler pigment for use in wood-containing paper manufacture, comprising by weight 25 to 50 % of a fine particle size hydrous kaolin which has been defined as to have particle size distribution such that less than 20 % by weight are of less than 0.3 νm E.S.D. and substantially the balance being a fine particle size calcined kaolin.</p> |
