Coating processes – With post-treatment of coating or coating material – Solid treating member or material contacts coating
Reexamination Certificate
2004-07-22
2009-12-01
Shewareged, Betelhem (Department: 1794)
Coating processes
With post-treatment of coating or coating material
Solid treating member or material contacts coating
C427S356000, C427S361000, C427S365000, C427S376100, C428S195100, C428S206000, C428S325000
Reexamination Certificate
active
07625607
ABSTRACT:
A method of producing the low glare, high print gloss paper of the invention comprises the steps of providing a paper substrate, coating the substrate with an aqueous coating composition having, as a dry parts by weight per 100 parts of pigment, 50-90 parts coarse delaminated clay pigment having a particle size of 8-12 microns and 10-20 parts calcium carbonate having a particle size of between 0.7 and 1.1 microns, drying the coating; and supercalendering the coated substrate with at least two passes per side with rolls having a surface roughness of 90-130 Ra. The step of supercalendering imparts a Parker Print-Surf roughness of 1.7-2.2 microns and a sheet gloss of about 25-30. Four color printing produces a print gloss of 65-70 and a delta gloss of at least 38.
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Characteristics of Parker Print-Surf roughness as compared with Bekk smoothness; Enomae, T. and Onabe, F.; Paper Science Laboratory; The University of Tokyo, Japan.
Benjamin Dean F.
Berger Bernard J.
Cherukuri Suresh B.
Greer Burns & Crain Ltd.
NewPage Wisconsin System Inc.
Shewareged Betelhem
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