Active energy ray curable composition, stereoscopic modeling material, active energy ray curable ink, inkjet ink, active energy ray curable composition container, two-dimensional or three-dimensional image forming apparatus, two-dimensional or three-dimensional image forming method, cured product, and processed product

An active energy ray curable composition, comprising:

• a polymerization initiator;
• a polymerizable compound;
• and
• a black pigment,
• wherein the polymerizable compound comprises at least one monofunctional monomer and at least one polyfunctional monomer and/or polyfunctional oligomer,
• wherein the polymerization initiator includes at least two members selected from the group consisting of an aminoalkylphenone compound, an acylphosphine oxide compound, and a thioxanthone derivative,
• wherein the monofunctional monomer comprises at least one acrylamide compound selected from the group consisting of acryloyl morpholine and methacryloyl morpholine,
• wherein, when the active energy ray curable composition is formed into a film having an average thickness of 10 μm on a substrate and irradiated active energy ray until an accumulated amount of light becomes 300 mL/cm2 to become a cured film, the cured film satisfies the following conditions (1) and (2):
• (1) when the substrate is a polyethylene terephthalate substrate, the cured film on the substrate has a transmission density of from 1.5 to 3.0 that is measured with a transmission densitometer, and
• (2) when the substrate is a polycarbonate substrate, the cured film on the substrate has a first length (L1) and a second length (L2) before and after a tensile test, respectively, and a ratio of the second length (L2) to the first length (L1) ranges from 1.5 to 4.0, wherein the tensile test includes forming the cured film on the substrate into a dumbbell-shaped specimen No. 6 defined in Japanese Industrial Standards K6251 and stretching the specimen with a tensile tester at a stretching speed of 20 mm/min and a temperature of 180° C.

An active energy ray curable composition, comprising:

• a polymerization initiator;
• a polymerizable compound;
• and
• a black pigment,
• wherein the polymerizable compound comprises at least one monofunctional monomer and at least one polyfunctional monomer and/or polyfunctional oligomer,
• wherein the polymerization initiator includes at least two members selected from the group consisting of an aminoalkylphenone compound, an acylphosphine oxide compound, and a thioxanthone derivative,
• wherein the monofunctional monomer is at least one selected from the group consisting of dimethyl acrylamide, dimethyl methacrylamide, hydroxyethyl acrylamide, hydroxyethyl methacrylamide,
• wherein, when the active energy ray curable composition is formed into a film having an average thickness of 10 μm on a substrate and irradiated with an active energy ray until an accumulated amount of light becomes 300 mL/cm2 to become a cured film, the cured film satisfies the following conditions (1) and (2):
• (1) when the substrate is a polyethylene terephthalate substrate, the cured film on the substrate has a transmission density of from 1.5 to 3.0 that is measured with a transmission densitometer, and
• (2) when the substrate is a polycarbonate substrate, the cured film on the substrate has a first length (L1) and a second length (L2) before and after a tensile test, respectively, and a ratio of the second length (L2) to the first length (L1) ranges from 1.5 to 4.0, wherein the tensile test includes forming the cured film on the substrate into a dumbbell-shaped specimen No. 6 defined in Japanese Industrial Standards K6251 and stretching the specimen with a tensile tester at a stretching speed of 20 mm/min and a temperature of 180° C.