The present invention relates to an ink-jet printing method of overprinting a first ink and a second ink on a low-liquid absorbing printing medium, in which the first ink and the second ink are respectively in the form of a water-based ink containing a colorant (A), a polymer (B), an organic solvent (C) and water, and satisfy the following formulae (1) and (2), said ink-jet printing method including the steps of forming characters or images using at least one ink as the first ink, and then forming a background image using the second ink such that the background image is superimposed on at least a part of the characters or images formed by the first ink: [T.sub.2−T.sub.1]<0 mN/m (1); and [V.sub.2−V.sub.1]≥1.0 mPa.Math.s (2) wherein T.sub.2 is the static surface tension of the second ink; T.sub.1 is the static surface tension of the first ink; V.sub.2 is the viscosity of the second ink as measured at 32° C.; and V.sub.1 is the viscosity of the first ink as measured at 32° C. According to the method of the present invention, it is possible to obtain good printed characters or images that are excellent in uniformity of solid image printing and suffer from less intercolor bleeding.

A barium titanate fiber is useful as a filler for a polymer composite piezoelectric body, a polymer composite piezoelectric body has high piezoelectric properties, and a piezoelectric element utilizes the polymer composite piezoelectric body. In the barium titanate fiber, the molar ratio of barium atoms to titanium atoms (Ba/Ti ratio) falls within the range of 1.01 to 1.04. The polymer composite piezoelectric body includes a resin composition containing the barium titanate fiber and a polymer. The piezoelectric element including an electrically conductive layer on one surface or both surfaces of the polymer composite piezoelectric body.

This disclosure describes multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of testing powder bed material for contamination. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent and a detector solution. The fusing agent can include water, an electromagnetic radiation absorber, and a first pigment reactant. The electromagnetic radiation absorber can absorb radiation energy and convert the radiation energy to heat. The detector solution can include water and a second pigment reactant. The second pigment reactant can be reactive with the first pigment reactant to form a

An active-energy-ray-curable composition includes a polymerizable dendritically-branched compound and a polyester resin containing a polymerizable unsaturated bond.

A modified pigment for radiation curable gravure ink, comprising a pigment and inorganic oxide nanoparticles coated on the surface of the pigment, wherein the DBP oil absorption is 150 ml/100 g-250 ml/100 g, the particle size is 0.01 μm-1 μm, and the pH value is 4.5-10.

A cleaning liquid includes water, a surfactant, and glycol ether. The surfactant is an acetylene surfactant or a silicone surfactant. A content ratio of the glycol ether is at least 5% by mass and no greater than 15% by mass relative to a mass of the cleaning liquid. Preferably, a contact angle of the cleaning liquid to an austenitic stainless steel plate is no greater than 40 degrees.

Adhesive compositions that can be applied to substrates using inkjet printheads and cured to a hardened, tack-free state and readily rendered tacky on application of heat and pressure to accurately transfer foil to the substrates including one or more free-radical curing monomers, an oligomer/resin composition component including one or more oligomers and one or more inert thermoplastic resins that are soluble in the monomers, and, where required, one or more free radical photoinitiators.

Adhesive compositions that can be applied to substrates using inkjet printheads and cured to a hardened, tack-free state and readily rendered tacky on application of heat and pressure to accurately transfer foil to the substrates including one or more free-radical curing monomers, an oligomer/resin composition component including one or more oligomers and one or more inert thermoplastic resins that are soluble in the monomers, and, where required, one or more free radical photoinitiators.

Provided are an ink composition including water, particles including a polymer having at least one selected from the group consisting of a urethane group and a urea group, and a gelling agent having a hydrogen-bonding group; a method for producing the ink composition; and an image-forming method.

Provided are an ink composition including water, particles including a polymer having at least one selected from the group consisting of a urethane group and a urea group, and a gelling agent having a hydrogen-bonding group; a method for producing the ink composition; and an image-forming method.