Abstract: A titanium dioxide slurry for ink jet ink, which comprises water and surface-treated titanium dioxide particles dispersed in the water, the surface treatment being a treatment with an inorganic phosphoric acid compound. Also disclosed is an ink comprising the titanium dioxide slurry.

Abstract: The object is to provide a photosensitive resin which is improved in the environmental problem or working environment problem, reduced in the load on a production apparatus and enhanced in the safety during transportation or storage while maintaining the resolution, etching resistance and low cost of conventional liquid photosensitive resin compositions. Another object is to provide a production process of a printed wiring board, where the non-uniformity of film thickness or liquid dripping at the time of coating a photosensitive resin on a printed board by a dipping method is reduced and high quality and excellent productivity are ensured. The objects were achieved by using a photosensitive resin composition comprising a specific compound having two or more polymerizable unsaturated bonds within one molecule, a photopolymerization initiator, water, and a thixotropic agent, and, if necessary, an amine.

Abstract: A titanium dioxide slurry for ink jet ink, which comprises water and surface-treated titanium dioxide particles dispersed in the water, the surface treatment being a treatment with an inorganic phosphoric acid compound. Also disclosed is an ink comprising the titanium dioxide slurry.

Abstract: A photocurable composition comprising (A) 100 parts by weight of a compound having an ethylenically unsaturated group, (B) from 0.001 to 5 parts by weight of a cationic dye having an absorption maximum wavelength in the wavelength region of from 400 to 1,200 nm represented by formula (1: D+·A1−  (1) wherein D+ represents a cation having an absorption maximum wavelength in the wavelength region of from 400 to 1,200 nm, and A1 31 represents an anion, and (C) from 0.

Abstract: An additive for inkjet printing, comprising a stabilized ascorbic acid derivative. Also disclosed are a recording solution, a method for preventing discoloration and fading of an image, and a recording sheet, each using the additive. The color change of an image can be prevented by incorporating the stabilized ascorbic acid derivative into an inkjet-printed image.

Abstract: A photocurable paint composition for road markings is disclosed, comprising (A) a compound having an ethylenically unsaturated group, (B) a filler, (C) a cationic dye represented by formula (1): D+&Circlesolid;A1−  (1) (wherein D+ represents a cation having an absorption maximum wavelength in the wavelength region of from 400 to 1,200 nm, and A1− represents an optional anion), (D) a quaternary organic borate-type sensitizer represented by formula (2): (wherein R1, R2, R3 and R4 each independently represents an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an alkynyl group, a silyl group, a heterocyclic group or a halogen atom, and Z+ represents an optional cation) and (E) an ultraviolet radical polymerization initiator capable of generating a radical upon absorption of light at a wavelength of 400 nm or less, or additionally comprising (F) glass beads.

Abstract: Color reversion of photocured products which have been photocured with cationic dyes and quaternary organo borates can be notably suppressed by addition of phenolic compounds, aromatic thiol compounds, amine compounds and/or phosphorous compounds.

Abstract: A photocurable composition comprising an ultraviolet radical polymerization initiator, a cationic dye with absorptions in the visible light region, a quaternary boron salt and optionally a polymerization accelerator, is irradiated with ultraviolet light and visible light either simultaneously or separately, to achieve adequate hardening in air of both the surface and the interior of the cured product, and to provide a cured product with an excellent appearance and without production of coloring substances derived from the polymerization initiator.