The product of pigment for paper coating composition, processes for producing a product of pigment into a composition for paper coating, and to produce a product of pigment.Coating composition for use in the production of coatings of brightness on paper and other substrates, and,Process for coating a sheet of paper, and calendering the paper to form a coating brightness

摘要

"The product of pigment for paper coating composition, processes for producing a product of pigment into a composition for paper coating, and to produce a product of pigment.Coating composition for use in the production of coatings of brightness on paper and other substrates, and,Process for coating a sheet of paper, and calendering the paper to form a coating of brilliance ".A product of the pigment suitable for use in a composition for coating a coating to undertake brilliant on paper.The coating comprising a particulate processed kaolin produced from a lamellar clay kaolin naturally having a particle size distribution such that approximately 50% to 60% by weight of the particles have an ESD less than 2 109 m and less than 25% by weight of the particles have an ESD less than 0.25 109 m and a shape factor of at least 15.This lamellar clay can be combined with components of clay fraction B. in the processing, the kaolin crude is milled to a shape factor greater than 50 to produce clay "lamellar" even bigger.The product of the pigment has a particle size distribution such that at least 80% by weight of the particles have an ESD less than 2 109 m and more than 12% and less than 35% by weight of P.Have a artu00edculas ESD less than 0.25 109 m and whose surface area is greater than 12 m ^ 2 ^ / g when measured by the process of bet.