Provided is an ink containing a compound represented by general formula (1) below where R.sub.1 represents a hydrogen atom or a methyl group, n represents an integer of 2 or greater, a plurality of R.sub.1 may be the same as or different from each other, X represents a hydrocarbon group having 2 to 10 carbon atoms, Y represents a tertiary hydroxyl group, or a group having an ester structure, and m represents an integer of 1 or greater. ##STR00001##

Provided is an ink containing a compound represented by general formula (1) below where R.sub.1 represents a hydrogen atom or a methyl group, n represents an integer of 2 or greater, a plurality of R.sub.1 may be the same as or different from each other, X represents a hydrocarbon group having 2 to 10 carbon atoms, Y represents a tertiary hydroxyl group, or a group having an ester structure, and m represents an integer of 1 or greater. ##STR00001##

In accordance with some embodiments of the present invention, an active energy ray curable composition including a polymerizable compound composition is provided. When the active energy ray curable composition is formed into a film having an average thickness of 10 m on a substrate and, after a lapse of 15 seconds, the film is irradiated with an active energy ray having a light quantity of 1,500 mJ/cm.sup.2 to become a cured product, the cured product satisfies the following conditions (1) and (2):

(1) when the substrate is a polypropylene substrate, the cured product has a glass transition temperature of 60 C. or more; and

(2) when the substrate is a polycarbonate substrate, an adhesion between the polycarbonate substrate and the cured product is 70 or more, the adhesion being measured according to a cross-cut adhesion test defined in Japanese Industrial Standards K5400.

In accordance with some embodiments of the present invention, an active energy ray curable composition including a polymerizable compound composition is provided. When the active energy ray curable composition is formed into a film having an average thickness of 10 m on a substrate and, after a lapse of 15 seconds, the film is irradiated with an active energy ray having a light quantity of 1,500 mJ/cm.sup.2 to become a cured product, the cured product satisfies the following conditions (1) and (2):

(1) when the substrate is a polypropylene substrate, the cured product has a glass transition temperature of 60 C. or more; and

(2) when the substrate is a polycarbonate substrate, an adhesion between the polycarbonate substrate and the cured product is 70 or more, the adhesion being measured according to a cross-cut adhesion test defined in Japanese Industrial Standards K5400.

Provided is Ink including a pigment, a resin, a water-soluble organic solvent, and water, wherein a solid content of first liquid as prepared by diluting the ink 500-fold with water and by adding CaCl.sub.2 at a concentration of 1.5 mM has a rate of aggregation of 1.5 nm/second or less; and a solid content of second liquid as prepared, after the ink has been stored at 60 C. for 2 weeks, by diluting the ink 500-fold with water and by adding CaCl.sub.2 at a concentration of 5 mM has a rate of aggregation of 2.0 nm/second or more.

Provided is Ink including a pigment, a resin, a water-soluble organic solvent, and water, wherein a solid content of first liquid as prepared by diluting the ink 500-fold with water and by adding CaCl.sub.2 at a concentration of 1.5 mM has a rate of aggregation of 1.5 nm/second or less; and a solid content of second liquid as prepared, after the ink has been stored at 60 C. for 2 weeks, by diluting the ink 500-fold with water and by adding CaCl.sub.2 at a concentration of 5 mM has a rate of aggregation of 2.0 nm/second or more.

An aqueous inkjet ink set for manufacturing decorative panels comprising: a) a cyan aqueous inkjet ink containing a beta-copper phthalocyanine pigment; b) a red aqueous inkjet ink containing a red pigment R and a polymeric dispersant P; c) a yellow aqueous inkjet ink containing a yellow pigment; and d) a black aqueous inkjet ink containing a carbon black pigment; wherein the red aqueous inkjet ink has a weight ratio R/P of red pigment R to polymeric dispersant P that complies with 1.2<R/P<3.0; and wherein the average particle diameter APD of the red pigment R complies with 175 nm<APD<240 nm, as determined by a dynamic light scattering technique using a laser having an emission wavelength of 633 nm and measured under a scattering angle of 90 degrees.

An aqueous inkjet ink set for manufacturing decorative panels comprising: a) a cyan aqueous inkjet ink containing a beta-copper phthalocyanine pigment; b) a red aqueous inkjet ink containing a red pigment R and a polymeric dispersant P; c) a yellow aqueous inkjet ink containing a yellow pigment; and d) a black aqueous inkjet ink containing a carbon black pigment; wherein the red aqueous inkjet ink has a weight ratio R/P of red pigment R to polymeric dispersant P that complies with 1.2<R/P<3.0; and wherein the average particle diameter APD of the red pigment R complies with 175 nm<APD<240 nm, as determined by a dynamic light scattering technique using a laser having an emission wavelength of 633 nm and measured under a scattering angle of 90 degrees.

A UV curable pigmented inkjet ink set comprising: one or more achromatic colour inkjet inks including a black inkjet ink containing a carbon black pigment; and five chromatic colour inkjet inks including: a first inkjet ink WR having a hue angle H* between 10? and 40? and a chroma C* between 30 and 80; a second inkjet ink WY having a hue angle H* between 65? and 85? and a chroma C* between 30 and 80; a third inkjet ink Y having a hue angle H* between 85? and 105? and a chroma C* larger than 80; a fourth inkjet ink C having a hue angle H* between 180? and 240? and a chroma C* between 30 and 80; and a fifth inkjet ink M having a hue angle H* between 300? and 360? and a chroma C* between 30 and 80; wherein the hue angle H* and the chroma C* were calculated from CIE L*a*b* coordinates determined on a polyethylene coated white paper for a 2? observer under a D50 light source; wherein the chromatic colour inkjet inks having a hue angle H* between 180? and 360? have a ratio T/P of thioxanthone compound to pigment complying with the relationship: 0.0?T/P?0.2, wherein T represents the wt % of thioxanthone compound and P represents the wt % of pigment, both wt % based on the total weight of the inkjet ink.

A UV curable pigmented inkjet ink set comprising: one or more achromatic colour inkjet inks including a black inkjet ink containing a carbon black pigment; and five chromatic colour inkjet inks including: a first inkjet ink WR having a hue angle H* between 10? and 40? and a chroma C* between 30 and 80; a second inkjet ink WY having a hue angle H* between 65? and 85? and a chroma C* between 30 and 80; a third inkjet ink Y having a hue angle H* between 85? and 105? and a chroma C* larger than 80; a fourth inkjet ink C having a hue angle H* between 180? and 240? and a chroma C* between 30 and 80; and a fifth inkjet ink M having a hue angle H* between 300? and 360? and a chroma C* between 30 and 80; wherein the hue angle H* and the chroma C* were calculated from CIE L*a*b* coordinates determined on a polyethylene coated white paper for a 2? observer under a D50 light source; wherein the chromatic colour inkjet inks having a hue angle H* between 180? and 360? have a ratio T/P of thioxanthone compound to pigment complying with the relationship: 0.0?T/P?0.2, wherein T represents the wt % of thioxanthone compound and P represents the wt % of pigment, both wt % based on the total weight of the inkjet ink.