Patent ID: 9127406
Filing Date: 2015-09-08
Classification: B41M,D21H

Abstract:
1. A surface coating composition for inkjet media, comprising: a binder including at least one of water soluble polymers, water dispersible polymers, or combinations thereof, wherein the binder includes about 5 parts to about 20 parts by weight per 100 parts by weight of pigments; a pigment in a weight percent ratio ranging from 5% to 40% of porous inorganic pigments to one of i) an inorganic pigment selected from the group consisting of clay, kaolin, calcium carbonate, talc, titanium dioxide, zeolites, and combinations thereof, ii) organic pigments, or iii) a combination of i) and ii); an optical brightening agent in an amount ranging from 5 kg per metric ton to 10 kg per metric ton of the inkjet media as measured with a base paper substrate of 100 gsm; a metallic salt; and a chemical chelant selected from the group consisting of organic phosphonate, phosphate, carboxylic acids, dithiocarbamates, sulfites, phosphines, and combinations thereof, wherein the chemical chelant hinders quenching of the optical brightening agent by the metallic salt, wherein a ratio of the chemical chelant in kg per metric ton to the metallic salt in kg per metric ton in the surface coating composition ranges from 5:15 to 20:5.