A photocurable transparent ink composition for three-dimensional molding includes the following components in parts by weight: 60-125 parts of a photocuring agent, 0.01-5 parts of a yellowing adjusting agent, 0.5-5 parts of a photoinitiator, and 0.5-5 parts of an auxiliary agent, where the yellowing adjusting agent can absorb light in a wavelength range of 560 nm to 650 nm, so that the ink composition appears transparent. The photocurable transparent ink composition for three-dimensional molding can prevent yellowing of a printed article and make the printed article show a whiter, more transparent, and brighter appearance.

A photocurable transparent ink composition for three-dimensional molding includes the following components in parts by weight: 60-125 parts of a photocuring agent, 0.01-5 parts of a yellowing adjusting agent, 0.5-5 parts of a photoinitiator, and 0.5-5 parts of an auxiliary agent, where the yellowing adjusting agent can absorb light in a wavelength range of 560 nm to 650 nm, so that the ink composition appears transparent. The photocurable transparent ink composition for three-dimensional molding can prevent yellowing of a printed article and make the printed article show a whiter, more transparent, and brighter appearance.

An ink composition useful for digital offset printing applications includes a colorant and a high viscosity thickening agent. The ink is formulated to incorporate polyester viscosity modifier to help meet the requirement of two different viscosity or temperature pairs at two different stages of the process. In digital offset printing a bulk ink is first transferred onto an anilox roll, and then from the anilox roll onto the imaging cylinder blanket. During the bulk ink to anilox roll the disclosed ink has a low viscosity while the transfer from roll to imaging blanket the ink has a higher viscosity. The addition of the polyester viscosity modifier increases the viscosity difference within the allowable temperature range, thus, increasing process latitude and robustness.

The present invention provides a process for manufacturing a security feature for securing a value document, wherein said security feature exhibits a blue color upon viewing in transmitted light and a metallic yellow color upon viewing in Incident light. The manufacturing process comprises the following steps: a) printing a specific UV-Vis radiation curable ink on a transparent or partially transparent region of a substrate of a value document; b) heating the ink layer obtained at step a) at a temperature of about 55° C. to about 100° C. for at least one second so that the ink layer exhibits a metallic yellow color upon viewing in incident light; and c) UV-Vis curing the ink layer obtained at step b) to form the security feature. The manufacturing process according to the present invention enables the expedient production of security features exhibiting a blue color upon viewing in transmitted light and a metallic yellow color upon viewing in incident light and is particularly useful for industrial printing of value documents.

The present invention provides a process for manufacturing a security feature for securing a value document, wherein said security feature exhibits a blue color upon viewing in transmitted light and a metallic yellow color upon viewing in Incident light. The manufacturing process comprises the following steps: a) printing a specific UV-Vis radiation curable ink on a transparent or partially transparent region of a substrate of a value document; b) heating the ink layer obtained at step a) at a temperature of about 55° C. to about 100° C. for at least one second so that the ink layer exhibits a metallic yellow color upon viewing in incident light; and c) UV-Vis curing the ink layer obtained at step b) to form the security feature. The manufacturing process according to the present invention enables the expedient production of security features exhibiting a blue color upon viewing in transmitted light and a metallic yellow color upon viewing in incident light and is particularly useful for industrial printing of value documents.

An active energy ray curable composition is provided. The active energy ray curable composition includes a polymerizable monomer (A) and a polymerization initiator (B). The polymerization initiator (B) includes a skin-sensitizing polymerization initiator (B1) in an amount less than 1.0% by mass but not less than 0.1% by mass of the active energy ray curable composition, and 99.0% by mass or more of the active energy ray curable composition consists of non-skin-sensitizing constituents.

An active energy ray curable composition is provided. The active energy ray curable composition includes a polymerizable monomer (A) and a polymerization initiator (B). The polymerization initiator (B) includes a skin-sensitizing polymerization initiator (B1) in an amount less than 1.0% by mass but not less than 0.1% by mass of the active energy ray curable composition, and 99.0% by mass or more of the active energy ray curable composition consists of non-skin-sensitizing constituents.

An inkjet ink for a glass substrate can enable formation of an aesthetic image with high concealability on the surface of the glass substrate. The inkjet ink disclosed here can include: an inorganic solid including an inorganic pigment that develops black and a glass frit; a monomer component having a photocuring property; and a photoinitiator. In the inkjet ink, a volume ratio of the inorganic solid in a case where an ink total volume is 100 volume% can be 35 volume% or less, a volume ratio of the inorganic pigment in the case where a total volume of the inorganic solid is 100 volume% can be 15 volume% or more and less than 90 volume%, and a volume ratio of the inorganic pigment to the photoinitiator can be 6 times or less.

An inkjet ink for a glass substrate can enable formation of an aesthetic image with high concealability on the surface of the glass substrate. The inkjet ink disclosed here can include: an inorganic solid including an inorganic pigment that develops black and a glass frit; a monomer component having a photocuring property; and a photoinitiator. In the inkjet ink, a volume ratio of the inorganic solid in a case where an ink total volume is 100 volume% can be 35 volume% or less, a volume ratio of the inorganic pigment in the case where a total volume of the inorganic solid is 100 volume% can be 15 volume% or more and less than 90 volume%, and a volume ratio of the inorganic pigment to the photoinitiator can be 6 times or less.

An object is to provide a photocurable inkjet printing ink composition offering curability and adhesion on printing targets including sheets whose printing face is constituted by paper, polyester, polyvinyl chloride, ethylene-vinyl acetate-based copolymer, or other vinyl-based polymers, etc., and additionally having storage stability. The cured coating film has low odor, low tackiness, abrasion resistance, high water resistance, high ethanol resistance, stretchability, and excellent bending resistance. Means for solving the problem includes providing a photocurable inkjet printing ink composition containing vinyl methyl oxazolidinone by 5 to 50% by mass relative to the entire ink composition, a monofunctional photopolymerizable monomer having a glass-transition temperature of 10° C. or less by 10 to 50% by mass relative to the entire ink composition, a colorant, and a photopolymerization initiator.