High solids interactive coating composition and manufacturing method therefor

摘要

A coating composition for an ink jet recording medium comprises an aqueous suspension of absorptive pigment, a binder, a sizing agent, and a cationic fixing agent. The coating composition combines solids content of greater than 30% with good runnability. The composition may preferably be dispersed at pH values in the range of 4.5 to 7.0. The pigment is preferably a mixture of 75% or more silica gel having a pore volume of 0.5-2.0 cc/g, and 10% or more alumina or alumina hydrate. A method for making down the coating composition includes the sequential steps of dispersing a polyvinyl alcohol binder in water, cooling the binder dispersion, dispersing a sizing agent, and mixing the suspension thoroughly before addition of a cationic fixing agent and pigment.