Pigment products

  • US 6,616,749 B1
  • Filed: 10/04/2000
  • Issued: 09/09/2003
  • Est. Priority Date: 04/04/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. A pigment product suitable for use in a coating composition to provide a gloss coating on paper, the pigment product comprising a processed particulate kaolin whose particles have a particle size distribution such that at least 80% by weight of the particles have an equivalent spherical diameter less than 2 μ

  • m and not less than 8% by weight of the particles have an equivalent spherical diameter less than 0.25 μ

    m and whose particles have a shape factor of at least 45.

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