Low glare, high print gloss printing paper

Details Low glare, high print gloss printing paper Low glare, high print gloss printing paper

2008-11-18

2010-10-12

Shewareged, Betelhem (Department: 1785)

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

C428S206000, C428S325000

Reexamination Certificate

active

07811657

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.

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