The present invention is directed to primer coatings that enhance the adhesion of liquid digital printing inks and toners to the substrate. The coatings comprise one or more polyurethane dispersions and one or more acrylic emulsions. The coatings of the present invention improve resistance to mineral oils, such as those typically found in liquid digital printing inks and toners. The primer coatings of the invention also reduce blocking, so that a primer coated reel of substrate may be easily unrolled, even after having been stored in the rolled reel for an extended period of time.

The present disclosure is drawn to a coated print medium, a method of preparing a print medium, and a printing system. The coated print medium can comprise a substrate and a coating applied to the substrate. The coating can comprise, by dry weight percent, 5 wt % to 30 wt % of a polymeric binder, 20 wt % to 50 wt % of a cationic latex, 5 wt % to 15 wt % of a multivalent cationic salt, and 1 wt % to 20 wt % of an optical brightener; and 5 wt % to 20 wt % of a cationic polyamine.

A printable film that contains a polymeric film substrate with a front side and a backside. The printable film contains also a light diffusion layer and an image receiving layer. The light diffusion layer is applied on the backside of the polymeric film substrate and contains inorganic particles, dispersing agents and polymeric binders. The image receiving layer is applied over the light diffusion layer on the backside of the polymeric film substrate. Also disclosed herein is the method for obtaining the printable film.

A printable film that contains a base film substrate and an image receiving layer. The film substrate is a polyethylene terephthalate base film substrate that contains inorganic particles and that has an opacity ranging from about 50 to about 95. The image receiving layer comprises, at least, a polymeric network, poly-alkene polymeric compounds and inorganic compounds. Also disclosed herein is the method for obtaining the printable film.

An article in the form of a printable substrate having a showthrough value of about 0.14 or less, and an opacity value of at least about 88% which includes a paper substrate with a first and second surfaces formed of paper fibers having a basis weight of from about 12 to about 32 lbs/1300 ft.sup.2, and a substrate filler in an amount in the range of from 0 to about 30% by weight of the paper substrate; and a surface size layer on at least one of the first and second surfaces, the surface size layer having about 50 lbs or less per ton of the paper substrate of a starch surface sizing agent and a multivalent metal salt drying agent in an amount sufficient to impart to the at least one of the first and second surfaces a black print density value of at least about 0.8 when inkjet printed with pigmented inks and a waterfastness value of at least about 85% when inkjet printed with dye-based inks, the printable substrate having a MD tensile strength of at least about 12 lbs/in. and a CD tensile strength of at least about 6 lbs/in. Also, a method for preparing such a printable substrate.

The present disclosure is drawn to a coated print medium, a method of preparing a print medium, and a printing system. The coated print medium can comprise a substrate and a coating applied to the substrate. The coating can comprise, by dry weight, 5 wt % to 30 wt % of a polymeric binder, 20 wt % to 50 wt % of a cationic latex, 5 wt % to 15 wt % of a multivalent cationic salt, 1 wt % to 20 wt % of an optical brightener, and 1 wt % to 10 wt % of an anti-quenching agent selected from the group consisting of a sulfonated diphenyloxide, polyvinyl pyrrolidone, and combination thereof. In this example, if the polymeric binder is polyvinyl pyrrolidone, the anti-quenching agent is the sulfonated diphenyloxide.

A printable recording media that contains a substrate, an ink receiving layer having a (WT)IR factor of less than 0.9 on the image side of the substrate, and a curvature control layer having a the (WT)CC of less than 0.6, on the backside side of the substrate. The printable recording media has an R value, (WT)IR/(WT)CC that is ranging from 1.6 to 3.0. The ink receiving layer and the curvature control layer include, at least, a single or multiple types of polymeric binders and, at least, a single or multiple types of inorganic pigment particles.

An ink set includes: a water-based ink for ink-jet recording that contains water and at least one of a direct dye and an acid dye; and a fixing agent that contains a water-soluble polymer having diallyl amines as a constituent unit.

An aqueous resin composition including at least: a polyurethane resin that contains a carboxylate group; a crosslinking agent that contains at least two or more carbodiimide groups in one molecule; and a surfactant, wherein a molar ratio of the carbodiimide groups contained in the crosslinking agent to the carboxylate group contained in the polyurethane resin is 0.1 or greater and 5.0 or less, and the aqueous resin composition further contains an amine compound having a pkb of 3.5 or greater and 4.7 or less.

A recording medium and a method for making the recording medium are disclosed. The recording medium includes a core substrate. The core substrate includes a base having two opposed surfaces. The base includes from about 40% to about 70% organic material and from about 30% to about 60% inorganic material. The core substrate also includes a mineral coating layer disposed on one or both of the two opposed surfaces of the base. The mineral coating layer has a water-soluble or water-dispersible binder and mineral materials. An adhesion layer is disposed on the mineral coating layer. A surface treatment layer is disposed on the adhesion layer, and the surface treatment layer includes organic fibrous material.