Photopolymerizable inkjet ink

An ink cartridge, comprising:

• a polymerizable inkjet ink;
• and
• a container housing the polymerizable inkjet ink,
• wherein the polymerizable inkjet ink comprises photopolymerizable monomers comprising a compound (A) that is negative for skin sensitization, a compound (B) that is negative for skin sensitization, and a photoradical polymerization initiator,
• wherein
• the compound (A) is at least one compound selected from the group consisting of a caprolactone-modified dipentaerythritol hexaacrylate, a polyethoxylated tetramethylol methane tetraacrylate, an ethylene oxide-modified bisphenol A diacrylate, a caprolactone-modified hydroxy pivalic acid neopentyl glycol diacrylate, a polypropylene glycol diacrylate [CH2═CH—CO—(OC3H6)n-OCOCH═CH2 (n≈12)], a hydroxyethyl acryl amide, a trimethylol propane trimethacrylate, and a tricyclodecane dimethanol dimethacrylate,
• the compound (B) is at least one compound selected from the group consisting of an ethylene oxide-modified phenolacrylate, an isostearyl acrylate, and a glycerin dimethacrylate,
• the photoradical polymerization initiator is 2,4-diethyl thioxanthone, and the ink has a viscosity of from 2 to 150 mPa·s at a temperature of 25° C. and a viscosity of from 2 to 20 mPa·s at 60° C.

An inkjet recording device, comprising:

• a polymerizable inkjet ink;
• and
• an ink applying unit configured to apply the polymerizable inkjet ink on a base material to be printed,
• wherein the polymerizable inkjet ink comprises photopolymerizable monomers comprising a compound (A) that is negative for skin sensitization, a compound (B) that is negative for skin sensitization, and a photoradical polymerization initiator,
• wherein
• the compound (A) is at least one compound selected from the group consisting of a caprolactone-modified dipentaerythritol hexaacrylate, a polyethoxylated tetramethylol methane tetraacrylate, an ethylene oxide-modified bisphenol A diacrylate, a caprolactone-modified hydroxy pivalic acid neopentyl glycol diacrylate, a polypropylene glycol diacrylate [CH2═CH—CO—(OC3H6)n-OCOCH═CH2 (n≈12)], a hydroxyethyl acryl amide, a trimethylol propane trimethacrylate, and a tricyclodecane dimethanol dimethacrylate,
• the compound (B) is at least one compound selected from the group consisting of an ethylene oxide-modified phenolacrylate, an isostearyl acrylate, and a glycerin dimethacrylate,
• the photoradical polymerization initiator is 2,4-diethyl thioxanthone, and
• the ink has a viscosity of from 2 to 150 mPa·s at a temperature of 25° C. and a viscosity of from 2 to 20 mPa·s at 60° C.