There is provided a radiation curable ink jet composition including: a monomer A that has one of a (meth)acryloyloxy group and a (meth)acryloyl group and has a cyclic structure containing one or more nitrogen atoms and one or more oxygen atoms in addition to the (meth)acryloyloxy group and the (meth)acryloyl group; and a monofunctional monomer B other than the monomer A; in which the content of the monomer A is equal to or less than 25% by mass with respect to the total mass of the composition, and in which mol average Tg of the monomer A and the monofunctional monomer B is equal to or greater than 45° C.

A pigment printing ink jet ink composition includes a pigment, a resin particle, an organic solvent, and water. The organic solvent includes an amide compound represented by the following general formula (1). ##STR00001## In the general formula (1), R.sup.1 represents a straight chain or branched alkyl group having 1 to 6 carbon atoms, and R.sup.2 and R.sup.3 each independently present hydrogen atoms or a straight chain or branched alkyl group having 1 to 4 carbon atoms.

The present invention relates to a method for applying an image onto a recording medium, using an aqueous ink jet coating, wherein the aqueous ink jet coating includes a cationic polymer and an anionic surfactant. The present invention further relates to a method for preparing such aqueous ink jet coating composition.

The ink jet printing method includes applying an aqueous coloring ink composition onto a printing surface of a printing medium by being ejected from an ink jet head. The printing surface of the printing medium contains natural fibers and synthetic fibers.

According to one embodiment, an ink which can be decolored upon heating is provided. Colored images can be formed with the ink by various methods, such as ink jetting or the like, then later the images can be decolored with heat. An ink according to an embodiment contains a color developable compound, a color developing agent that causes the color developable compound to develop a color, a nonaqueous solvent, and a decoloring agent that is insoluble in the nonaqueous solvent and decolors the color developable compound upon heating.

A method and system for producing reliefs on substrates by digital inkjet printing of drops of a relief material which is deposited on localized areas of the surface of a substrate to obtain a relief surface with a relief determined by the relief material deposited, a coating sheet being incorporated over the relief material deposited, which conforms to said relief surface, the coating sheet being fixed by gluing by means of a glue which is applied together or in combination with the relief material.

Described herein are molecular inks, methods for printing the molecular inks on flexible substrates, and methods for forming printed electronic elements, such as resistive heaters, force sensors, motion sensors, and devices that include these elements, such as force responsive conductive heaters. The methods include printing a molecular ink on a flexible substrate that is heated to 30° C. to 90° C. before and/or during the printing process and curing the substrate to produce a conductive pattern thereon. The molecular inks generally include a particle-fee metal-complex composition formulated from at least one metal complex and a solvent, and optionally, a conductive filler material, and/or surfactant.

A printable non-curable thixotropic hot melt composition is described. The composition comprises non-curable holt melt waxes transformed into a thixotropic composition by the use of thickeners. The thickeners can be added separately to the hot melt wax or formed in-situ, either before or after application to the substrate. A process of forming such printable non-curable thixotropic hot melt composition is described.

An ink jet recording method is a method in which a cyan ink, a magenta ink, a black ink, and a yellow ink radiation that are curable inks are ejected from ink jet heads to attach the radiation curable inks to a recording medium. The method includes, in this order, a first step of attaching the cyan ink, the magenta ink, and the black ink onto the recording medium and applying temporary curing radiation to the recording medium and a second step of attaching the yellow ink onto the recording medium and applying full curing radiation to the recording medium without applying the temporary curing radiation.

Provided is an ink set including a first ink and a second ink. The second ink contains a high-viscosity component having a viscosity of 500 mPa.Math.s or higher at 25 degrees C., and a low-viscosity component having a viscosity of 30 mPa.Math.s or lower at 25 degrees C. A static surface tension γ1 (mN/m) of the first ink and a static surface tension γ2 (mN/m) of the second ink satisfy General formula (1) below.

1 (mN/m)≤γ1−γ2≤5 (mN/m)  General formula (1)

A content A (% by mass) of each component contained in the first ink, a static surface tension B (mN/m) of each component contained in the first ink, a content C (% by mass) of each component contained in the second ink, and a static surface tension D (mN/m) of each component contained in the second ink satisfy General formula (2) below.

ΣA/Σ(A/B)−ΣC/Σ(C/D)≥0 (mN/m)  General formula (2)