An ink includes the following ingredients by weight: pigment: 5 to 10 wt %; dispersant: 1 to 5 wt %; photoinitiator: 5 to 8 wt %; monofunctional reactive monomer 10 to 15 wt %; multifunctional reactive monomer: 25 to 40 wt %; acrylic resin: 20 to 35 wt %; coupling agent: 2 to 5 wt %; defoamer: 0.1 to 1 wt %; and leveling agent: 0.1 to 1 wt %. The ink according to this application can concurrently meet various performance requirements such as deep curing, high adhesion, high resistance to abrasion and perspiration, and ease of correction.

An ink includes the following ingredients by weight: pigment: 5 to 10 wt %; dispersant: 1 to 5 wt %; photoinitiator: 5 to 8 wt %; monofunctional reactive monomer 10 to 15 wt %; multifunctional reactive monomer: 25 to 40 wt %; acrylic resin: 20 to 35 wt %; coupling agent: 2 to 5 wt %; defoamer: 0.1 to 1 wt %; and leveling agent: 0.1 to 1 wt %. The ink according to this application can concurrently meet various performance requirements such as deep curing, high adhesion, high resistance to abrasion and perspiration, and ease of correction.

[Problem to be Solved] Provided is a curable composition for inkjet printing, a coating film obtained from which has higher heat resistance than conventional coating films. [Solution] It is a curable composition for inkjet printing, comprising (A) a (meth)acrylate monomer having a cyclic skeleton and having a number of alkylene oxide modifications of one or more and six or less, (B1) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having two or more alkylene glycol structures, (B2) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having a monoalkylene glycol structure, and (C) a photopolymerization initiator. Accordingly, an obtained coating film does not crack, has excellent adhesion to a conductor, and maintains sufficient hardness even after a thermal history that corresponds to a plurality of times of soldering. The above problem to be solved is also solved by a curable composition for inkjet printing, comprising (A′) a (meth) acrylate monomer having a cyclic skeleton and having a number of alkylene oxide modifications of one or more and six or less, (B1′) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having two or more alkylene glycol structures, (B2′) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having a monoalkylene glycol structure, and (C′) a photopolymerization initiator.

[Problem to be Solved] Provided is a curable composition for inkjet printing, a coating film obtained from which has higher heat resistance than conventional coating films. [Solution] It is a curable composition for inkjet printing, comprising (A) a (meth)acrylate monomer having a cyclic skeleton and having a number of alkylene oxide modifications of one or more and six or less, (B1) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having two or more alkylene glycol structures, (B2) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having a monoalkylene glycol structure, and (C) a photopolymerization initiator. Accordingly, an obtained coating film does not crack, has excellent adhesion to a conductor, and maintains sufficient hardness even after a thermal history that corresponds to a plurality of times of soldering. The above problem to be solved is also solved by a curable composition for inkjet printing, comprising (A′) a (meth) acrylate monomer having a cyclic skeleton and having a number of alkylene oxide modifications of one or more and six or less, (B1′) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having two or more alkylene glycol structures, (B2′) a bifunctional (meth)acrylate monomer having no cyclic skeleton and having a monoalkylene glycol structure, and (C′) a photopolymerization initiator.

There is provided an ultraviolet ray irradiating apparatus configured to cure an ultraviolet-curable ink discharged to an object, by a discharging head which is configured to move in a main scanning direction, in a state that the ultraviolet ray irradiating apparatus is moved in the main scanning direction. The ultraviolet ray irradiating apparatus includes a plurality of light emitting chips configured to emit an ultraviolet ray, the plurality of light emitting chips being arranged side by side with a first pitch in the main scanning direction and being arranged side by side with a second pitch smaller than the first pitch in a sub scanning direction orthogonal to the main scanning direction.

There is provided an ultraviolet ray irradiating apparatus configured to cure an ultraviolet-curable ink discharged to an object, by a discharging head which is configured to move in a main scanning direction, in a state that the ultraviolet ray irradiating apparatus is moved in the main scanning direction. The ultraviolet ray irradiating apparatus includes a plurality of light emitting chips configured to emit an ultraviolet ray, the plurality of light emitting chips being arranged side by side with a first pitch in the main scanning direction and being arranged side by side with a second pitch smaller than the first pitch in a sub scanning direction orthogonal to the main scanning direction.

A radiation curable inkjet ink set comprising a cyan inkjet ink containing a beta-copper phthalocyanine pigment and a polymerizable composition; a magenta inkjet ink containing a magenta or red pigment and a polymerizable composition; a yellow inkjet ink containing a yellow pigment and a polymerizable composition; and a black inkjet ink containing a carbon black pigment and a polymerizable composition; wherein the polymerizable compositions of the cyan, magenta, yellow and black inkjet inks include on average: a) 20.0 to 40.0 wt % of phenoxyethyl acrylate; b) 23.0 to 32.0 wt % of isobornyl acrylate; c) 1.0 to 14.4 wt % of monomer selected from the group consisting of 4-acryloylmorpholine and a monomer according to Formula (I), wherein X represents C or O, n represents 1, 2 or 3 and m represents 0 or 1; and d) up to 14.0 wt % of a multifunctional monomer or oligomer; wherein all weight percentages (wt %) are based upon the total weight of the inkjet ink; and wherein 0, 1 or 2 of the cyan, magenta, yellow and black inkjet inks deviate in a range a) to d) and this deviation is no more than 1.0 wt %.

##STR00001##

A radiation curable inkjet ink set comprising a cyan inkjet ink containing a beta-copper phthalocyanine pigment and a polymerizable composition; a magenta inkjet ink containing a magenta or red pigment and a polymerizable composition; a yellow inkjet ink containing a yellow pigment and a polymerizable composition; and a black inkjet ink containing a carbon black pigment and a polymerizable composition; wherein the polymerizable compositions of the cyan, magenta, yellow and black inkjet inks include on average: a) 20.0 to 40.0 wt % of phenoxyethyl acrylate; b) 23.0 to 32.0 wt % of isobornyl acrylate; c) 1.0 to 14.4 wt % of monomer selected from the group consisting of 4-acryloylmorpholine and a monomer according to Formula (I), wherein X represents C or O, n represents 1, 2 or 3 and m represents 0 or 1; and d) up to 14.0 wt % of a multifunctional monomer or oligomer; wherein all weight percentages (wt %) are based upon the total weight of the inkjet ink; and wherein 0, 1 or 2 of the cyan, magenta, yellow and black inkjet inks deviate in a range a) to d) and this deviation is no more than 1.0 wt %.

##STR00001##

The present invention relates to a printing substance for coating glass surfaces by way of an ink jet printing method, the printing substance comprising A) at least one monomer having at least one C—C double bond; B) at least one cationically curable monomer comprising epoxy groups; C) at least one cationically curable monomer comprising oxetane groups; D) at least one adhesion agent. In addition, the present invention describes a method for producing the printing substance and the use thereof.

A platelet-shaped magnetic effect pigment is provided for use in a printing ink, and includes a layer construction with a magnetic layer and at least one optical functional layer, such that the magnetic layer is based on a magnetic material having a column-shaped nanostructure and the magnetic columns respectively have a largely uniform preferential magnetic direction deviating from the platelet plane.