The present invention provides high brightness kaolins exhibiting a
Brightness (GE) of at least about 90.0. The hydrous kaolin pigments of
the present invention may also have, inter alia, a steepness index
(d.sub.30/d.sub.70.times.100) of at least about 39 and/or a titania
concentration less than or equal to about 0.40% by weight of the pigment
on a dry basis. (062) The hydrous kaolin pigment is produced by a process
comprising: a) forming an aqueous suspension of a hydrous kaolin clay; b)
forming a primary product by subjecting the suspension to classification
or a combination of classification and griding; c), separating the kaolin
from impurities by selective flocculation; and d) defining the separated
kaolin. (063) The hydrous kaolins of the present invention allow coated
papers to be produced at high brightness while maintaining acidic
conditions on a paper machine. The invention pigmets exhibit brightness
levels unexpectedly higher, e.g., about 2 to about 2.5 or more (GE) units
brighter, than exhibited by previous high brightness hydrous kaolin
pigments, without sacrificing other important paper properties. Paper
coated with the inventive pigmants have high brightness, high whiteness,
and high fluorescence levels. The present invention encompasses these
pigments, compositions comprising them, and any application in which they
are used.