Pigment for rotogravure paper
OwnerJohn Hen, William Michael Riggininventors
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Abstract
A mixture of bulked delaminated kaolin and calcined kaolin is used without addition of or substantial reduction in dosage of a titania pigment in a coating for rotogravure paper.
Claims15
A composition useful for coating a paper substrate adapted for rotogravure printing, said composition comprising a physical mixture consisting of a major amount by weight of delaminated kaolin bulked with a cationic polymeric chemical and a minor amount of 25 to 2% by weight of a calcined kaolin pigment.
Rotogravure paper coated with a pigment mixture free from or having a reduced content of titanium oxide, said pigment mixture consisting essentially of from 75 to 98% by weight of a delaminated kaolin bulked with a cationic polymeric chemical and from 25 to 2% by weight of a calcined kaolin pigment.
Dependencies are inferred from the claim text.