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US 2016/0355039 A1Published application
Recording sheet with improved print density
AssigneeInternational Paper Company
InventorsJOHN F. JACKSON, Krshna M. Pamidimukkala, Joseph T. McCarthy
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Abstract
This invention is directed to a composition that, when applied to a cellulosic substrate, provides a recording media that has enhanced print density for cyan, magenta and black flexographic printing inks, as well as methods of using and making the composition and media. Also, the present invention relates to a method of achieving enhanced print density with flexographic printing ink compositions at reduced concentrations.
Claims12
A method of making a printed substrate paper, comprising:
- forming an image onto at least one surface of a treated substrate paper using flexoprinting process, wherein the treated substrate paper comprises a sizing composition comprising ligno cellulosic fibers, a sizing agent, and a water soluble divalent metal salt,
- characterized in that
- said sizing composition comprises 13 to 17 wt % solids sizing agent, calcium carbon-ate, and 1 to 3 wt %, based on the total weight of the solids in the composition, of a water soluble calcium or magnesium salt.
Dependencies are inferred from the claim text.