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.

Provided is a laminate having a porous layer that can ensure the drying property of a printing ink and can also be produced with less gum residue generated. A laminate comprising a substrate layer (A) and a porous layer (B), wherein the porous layer (B) comprises a thermoplastic resin and a filler, the filler comprises a filler having a hydrophobized surface, as a part thereof, and the porous layer (B) has a liquid-absorptive capacity of 10 to 40 cc/m.sup.2 as measured in accordance with JIS P 8140:1998 with a 70 mass % ethanol aqueous solution.

An aqueous composition can be used for pre-treating a substrate prior to inkjet printing to provide a white opaque background for inkjet-printed images. This aqueous composition includes: (a) one or more water-soluble salts of a multivalent metal cation at 5-30 weight %; (b) a nonionic or cationic water-soluble or water-dispersible polymeric binder material at 5-30 weight %; and (c) surface-treated visible light-scattering particles having a D.sub.50 (median) particle size of at least 0.04 μm and up to and including 2 μm in an amount of 5-60 weight % based on the total aqueous composition weight. The pre-treated substrate is useful as an inkjet receiving medium that can be readily inkjet-printed particularly with anionically-stabilized aqueous pigment-based inks.

A pretreatment liquid that is used together with an aqueous inkjet ink containing a pigment and water, wherein the pretreatment liquid contains resin microparticles (A), a surfactant (B), a coagulant (C) and water, the surfactant (B) contains a polyoxyalkylene alkyl ether (b-1), and the coagulant (C) contains a polyvalent metal salt and/or a cationic polymer compound and has a water absorptivity at a temperature of 40° C. and a relative humidity of 80% of 75% by mass or less.

An inkjet recording medium, comprising an ink-receiving layer containing an inorganic pigment, a binder, an inkjet ink-fixing agent comprising a cationic compound, and organic spherical particles disposed on at least one surface of a base paper, wherein the ink-receiving layer further contains a water-soluble metal salt and 5 parts by weight or more to 15 parts by weight or less of polyvinyl alcohol (A) with a polymerization degree of 700 or less and 20 parts by weight or more to 40 parts by weight or less of polyvinyl alcohol (B) with a polymerization degree of 1200 or more as the binder with respect to 100 parts by weight of the ink-receiving layer; and a volume 50% average particle diameter (D50) as measured by a laser diffraction/scattering method of the organic spherical particles is 15.0 μm or more.

Provided are ink-receptive coating compositions including: (a) an aqueous anionic polyurethane dispersion; and (b) an aqueous solution of a nonionic polyurethane. Methods of coating substrates, and of printing, including providing and/or coating the composition onto a substrate are also provided.

A printing method in which a primer composition, which includes at least one pigment aggregating agent, is applied to a coated substrate prior to an ink-jet printing step. The ink-jet printing step is performed using inkjet droplets having x μm drop diameter, printed in a print resolution on the coated substrate that corresponds to a rectangular unit cell having cell dimensions of y μm by z μm, where a ratio of x/y is >0.60.

Provided is a laminate having a porous layer that can ensure the drying property of a printing ink and can also be produced with less gum residue generated. A laminate comprising a substrate layer (A) and a porous layer (B), wherein the porous layer (B) comprises a thermoplastic resin and a filler, the filler comprises a filler having a hydrophobized surface, as a part thereof, and the porous layer (B) has a liquid-absorptive capacity of 10 to 40 cc/m.sup.2 as measured in accordance with JIS P 8140:1998 with a 70 mass % ethanol aqueous solution.

A grayscale inkjet printing method including the steps of: a) supplying a pigmented inkjet ink to a grayscale print head having nozzles with an outer nozzle surface area smaller than 500 μm.sup.2 and having an acoustic resonance period ARP of not more than 5.5 μs; and b) applying a voltage wave form for ejecting pigmented inkjet ink from a nozzle of the grayscale print head within one jetting cycle; wherein the pigmented inkjet ink has a viscosity of at least 3.8 mPa.Math.s at jetting temperature and a shear rate of 1,000 s.sup.−1; wherein the voltage wave form for ejecting the largest ink droplet includes, in chronological order, a first ejecting pulse having an amplitude A1 and a second ejecting pulse having an amplitude A3 with the amplitude A1 complying with the relationship: 0.50×A3<A1<1.40×A3; and wherein a time period between the end time of the first ejecting pulse and the end time of the second ejecting pulse defines an idle time period including no other ejecting pulse, the time period having a duration between 1.5 to 2.5 times the acoustic resonance period ARP; and wherein any non-ejecting pulse having an amplitude A2 present during the idle time period complies with the relationship: A2≤0.15×A3. An inkjet printing system is also disclosed.

The present disclosure is drawn to coated print media, a method of preparing print media, and a printing system. The coated print media can comprise a substrate and a coating applied to the substrate. The coating can include, by dry weight, 5 wt % to 60 wt % of a polymeric binder having a Tg below 50 C, 10 wt % to 60 wt % of cationic latex having a Tg from 50 C to 130 C, 5 wt % to 30 wt % of a multivalent cationic salt, and 2 wt % to 25 wt % of a high density polyethylene wax.