An ink composition for a water-based ballpoint pen in which, even in a case of an ink composition for a water-based ballpoint pen using a colored resin particle containing a pigment, the phenomenon of skipped strokes does not occur and writing defects are less likely to occur when writing at a high writing angle or under a high load. An example of the ink composition for a water-based ballpoint pen according to the present embodiment includes an ink composition for a water-based ballpoint pen that contains at least a urethane-based colored resin particle containing a pigment and having an average particle size of 0.3 to 2 μm and a naphthalenesulfonic acid-formaldehyde condensate.

An ink composition for a water-based ballpoint pen in which, even in a case of an ink composition for a water-based ballpoint pen using a colored resin particle containing a pigment, the phenomenon of skipped strokes does not occur and writing defects are less likely to occur when writing at a high writing angle or under a high load. An example of the ink composition for a water-based ballpoint pen according to the present embodiment includes an ink composition for a water-based ballpoint pen that contains at least a urethane-based colored resin particle containing a pigment and having an average particle size of 0.3 to 2 μm and a naphthalenesulfonic acid-formaldehyde condensate.

A radiation-curable ink jet composition contains a polymerizable compound, a white pigment, and inorganic particles different from the white pigment. The polymerizable compound includes a monofunctional polymerizable compound. The content of the monofunctional polymerizable compound is 80 mass % or more with respect to the total mass of the polymerizable compound contained in the radiation-curable ink jet composition.

A radiation-curable ink jet composition contains a polymerizable compound, a white pigment, and inorganic particles different from the white pigment. The polymerizable compound includes a monofunctional polymerizable compound. The content of the monofunctional polymerizable compound is 80 mass % or more with respect to the total mass of the polymerizable compound contained in the radiation-curable ink jet composition.

Silicon particles with a reduced and/or delayed propensity to generate hydrogen gas by reaction with water in aqueous inks for preparing lithium ion battery anodes are prepared by milling silicon, preferably in an oxidative atmosphere, followed by heat treating at an elevated temperature in vacuum or an inert atmosphere.

Silicon particles with a reduced and/or delayed propensity to generate hydrogen gas by reaction with water in aqueous inks for preparing lithium ion battery anodes are prepared by milling silicon, preferably in an oxidative atmosphere, followed by heat treating at an elevated temperature in vacuum or an inert atmosphere.

Provided is a production method of a sheet member, including a process of forming, by printing, a phosphorescent layer containing a phosphorescent material on a surface of a sheet-shaped substrate with a transmissive property, and a process of forming a reflection layer, by printing, including a reflective material to reflect light on a surface of at least either one of the substrate or the phosphorescent layer in such a manner that the reflection layer overlaps at least a part of the phosphorescent layer in a thickness direction of the substrate.

Provided is a production method of a sheet member, including a process of forming, by printing, a phosphorescent layer containing a phosphorescent material on a surface of a sheet-shaped substrate with a transmissive property, and a process of forming a reflection layer, by printing, including a reflective material to reflect light on a surface of at least either one of the substrate or the phosphorescent layer in such a manner that the reflection layer overlaps at least a part of the phosphorescent layer in a thickness direction of the substrate.

A color conversion film is provided. The film includes at least one narrow band emission phosphor dispersed within a binder matrix, wherein the narrow band emission phosphor has a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U.sup.6+-containing phosphor, a green-emitting Mn.sup.2+-containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn.sup.4+, and a mixture thereof. A device is also provided.

The present application is drawn to infrared reflective ink formulations, infrared reflective dried coatings prepared from such inks, and IR-reflective substrates and adhesive tapes prepared from such inks and coatings. The inks are suitable for printing by gravure or flexo methods onto polymeric substrates such as PET, paper, or other substrate materials. The coatings are reflective in the near-infrared range. The coatings and tapes are well suited for use in manufacturing methods. The coatings and/or the tapes are ultrathin, on the order of a few micrometers, making them attractive for use in different industrial applications.