filler clay
A type of CLAY
incorporated into the papermaking furnish before
sheet formation. Its purpose is to fill the voids
between the paper fibers so as to improve
printability, opacity, brightness. etc. Filler
clays, such as KAOLIN , may be of a
larger particle size than those clays used as COATING CLAY .
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![[CoOL]](/icons/sm_cool.gif){kind=icon}