Newpage Corporation

Consolidated Papers, Inc.

Newpage Wisconsin System, Inc.

Stora Enso North America Corporation

James P Niemiec

Leonard J Schliesman, Jr

Charles E Romano, Jr

Leonard J Schliesman

Fikret Kaya

Robert S Van Helden

Charles E Romano

Jr Romano Charles E

Jr Schliesman Leonard J

An inkjet recording medium and a coating composition for forming an inkjet recording medium. In accordance with one aspect of the present invention, an inkjet recording medium is disclosed comprising an inkjet-receptive coating on a paper substrate. The inkjet-receptive coating contains a synergistic combination of pigments, binder and a multivalent metal salt such that the inkjet recording medium exhibits improved inkjet print properties, particularly when printed with a high speed inkjet printer using pigmented inks.

Recording medium for inkjet printing

An inkjet recording medium and a coating composition for forming an inkjet recording medium. In accordance with one aspect of the present invention, an inkjet recording medium is disclosed comprising an inkjet-receptive coating on a paper substrate. The inkjet-receptive coating contains a synergistic combination of pigments and binder such that the inkjet recording medium exhibits improved inkjet print properties, particularly when printed with a high speed inkjet printer using pigmented inks. In accordance with certain aspects of the present invention, the inkjet recording medium further comprises a top coat of a multivalent metal salt which further enhances image quality of the inkjet printing.

Inkjet recording medium

A paper coating includes a combination of a primary pigment and a secondary pigment. The primary pigment includes anionic particles having a particle size distribution where at least 96% of the particles by weight have a particle size less than 2 microns. The secondary pigment is a cationic, grit-free pigment having an average particle size of 3 microns or less. The coating also includes up to 17 weight % of a hydrophilic styrene-butadiene latex based on the weight of the dry pigments and a co-binder. Another embodiment of this invention is a coated base sheet that includes a base sheet to which the above coating has been applied.

Paper and coating medium for multifunctional printing

A method of and apparatus for minimizing the problem of 'fluting' or 'corrugating' occuring in printed webs of light weight coated paper printed on both sides with thermosetting ink on heat-set web-offset printing presses resides in spreading the web in its width-wise direction as the printed web exits from the ink drying and heat setting oven of the press and passes over the web cooling chill rolls downstream from the oven, thereby to hold the printed web in a flat and smooth condition until it is cooled and the ink has taken a permanent set. Spreading the web prior to and during cooling allows the inks to thermoset in a flat state because the web is kept flat and free of flutes during thermosetting of the inks. The method and apparatus facilitate operation of the press at higher speeds and with lighter grades of paper than conventional, and provide for increased production efficiencies, lower costs, enhanced print quality, and access to new markets for web-offset printing.

Method for minimizing web-fluting in heat-set, web-offset printing

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Wisconsin Rapids, WI, United States of America

James P Niemiec