Abstract: [Object] To provide an ink composition having excellent dispersion stability and writing performance. [Resolution Means] Provided are a composite colored particle including a resin particle carrying a positive electric charge on a particle surface, a colored particle carrying a negative electric charge on a particle surface, and a low-density particle, the colored particle and the low-density particle forming a composite with the resin particle through Coulomb force; a water-based ink composition containing the composite colored particles dispersed in a water-based medium; and a writing instrument loaded with the water-based ink composition.

Abstract: Provided is an aqueous ink composition for writing instruments containing colored resin particles encapsulating a pigment, wherein the ink is not repelled when the aqueous ink composition for writing instruments is used to write on a paper face attached with hand fingers or the like, and achieves a uniform density in a drawn line and excellent writing capability. An embodiment of the aqueous ink composition for writing instruments is an aqueous ink composition for writing instruments containing at least a pigment (a) and colored resin particles (A) encapsulating the pigment (a).

Abstract: Composite colored particles may include resin particles carrying a positive electric charge on particle surfaces and dye-containing particles carrying a negative electric charge on particle surfaces, the resin particles and the dye-containing particles forming a composite through Coulomb force. A water-based ink composition may include such composite colored particles dispersed in a water-based medium. A writing instrument may contain the water-based ink composition. A method of producing such composite colored particles may include forming a composite by mixing a resin emulsion containing resin particles carrying a positive electric charge on particle surfaces and a colored resin dispersion containing dye-containing particles carrying a negative electric charge on particle surfaces.

Abstract: Provided is an aqueous ink composition for writing instruments achieving excellent color development and excellent darkness of a drawn line, while colored resin particles encapsulating a pigment are used. An embodiment of the aqueous ink composition for writing instruments includes an aqueous ink composition for writing instruments containing at least colored resin particles (A) having a pigment (p) encapsulated in, and colored resin particles (B) having a pigment (p) exposed on a surface.

Abstract: Provided is a liquid storage member for coating tools which successfully reduces plastic consumption and reduces environmental loads, by making use of materials based on paper in place of plastics such as polypropylene that has been used for liquid (e.g., ink) storage members. A liquid storage member for coating tools having at least three layers of a paper base laminate composed of an inner layer made of paper base material, and a middle layer of a metal layer or a silica deposition layer, formed on the outer peripheral side of the inner layer; and an outer layer made of the paper base material formed on the outer peripheral side of the middle layer, wherein the paper base material of the inner layer has a density of 0.8 g/cm3 or more.

Abstract: A glassy carbon compact according to the present invention has a maximum inscribed sphere diameter of 5 mm or greater, comprises pores having diameters of 500 nm or less dispersed throughout the glassy carbon compact, and has a density of 1.1 g/cm3 or greater.

Abstract: A multifunction pen is provided including a refill for a writing implement such as a ballpoint pen on a tip end side and including an electromagnetic induction-based electromagnetic induction refill on a rear end side such that there is no need to perform a switching operation between the writing refill and the electromagnetic induction refill. The multifunction pen includes a shaft tube 10 including openings at both of a tip end and a rear end, a writing refill 40 that is housed inside the shaft tube 10 and that includes a writing tip exposed through the opening at the tip end, and an electromagnetic induction refill 50 that is housed inside the shaft tube 10, that is exposed through the opening at the rear end, and that is employed in electromagnetic induction-based input.

Abstract: An object is to provide a writing implement allowing the width of a drawn line to be freely changed by writing pressure that is capable of application to a narrow-shafted felt-tip pen or marker pen. The writing implement includes a shall tube, an ink supply core that is housed inside the shaft tube and that guides ink by capillary action, and a core surrounding member that is fitted to a leading end of the shaft tube, that is penetrated by the ink supply core, and from which a tip of the ink supply core projects. The ink supply core is configured to retract at a tip of the core surrounding member under writing pressure, and a projection dimension of the ink supply core from the tip of the core surrounding member is from 0.05 mm to 0.7 mm.

Abstract: Provided is a writing implement having a pen tip with a viewer part where the effective area for allowing visual recognition of the writing direction relative to the entire pen tip is maximized without impairing ink discharge. The pen tip feeds ink from the writing implement body, and the writing direction can be recognized through the viewer part. The pen tip has a holding body with the viewer part and a writing part that attaches a writing core having a U-shaped or L-shaped configuration to the holding body. The part of the writing core in contact with the side surface of the holding body is formed to have a square cross-section.

Abstract: An input pen is disclosed including a wood shaft, a mounting hole that is formed at an axial center of the wood shaft, and an input body that is rod-shaped and is mounted in the mounting hole, and wherein an inner side surface of the mounting hole and an outer side surface of the input body are fixed.

Abstract: A liquid absorbing body according to the present invention contains amorphous carbon and crystalline carbon particles dispersed in the amorphous carbon; the content of the crystalline carbon particles is from 60% by mass to 90% by mass based on the total mass of the amorphous carbon and the crystalline carbon particles; the degree of orientation as determined by a wide-angle X-ray scattering method is 75% or more; and the open porosity as determined in accordance with JIS R 1634 (1998) is 10% or more.

Abstract: A writing implement having a pen tip that can achieve excellent ink outflow performance and an increase in the effective area of a viewer portion allowing recognition of the writing direction, relative to the whole pen tip. The writing implement is a writing implement A which includes a pen tip 20 feeding ink from a writing implement body 10 and having a viewer portion through which the writing direction can be recognized, and is characterized in that the pen tip 20 is configured of, a least, a writing part 30 and a holding body 40 having a viewer portion 43, and the holding portion 40 has a sheet-shaped ink feeder 25 formed with slits or bumps on the surface and inside thereof to produce a capillary action.

Abstract: Provided is a liquid cosmetic composition which provides easily a clear and brilliant coating film without causing flaky pigments to be overlapped on each other when the liquid cosmetic composition containing a small amount of brilliant flaky pigments is filled in an applicator having a coating part composed of a brush to be coated on a surface such as a skin. The liquid cosmetic composition of the present invention is characterized in containing at least 0.01 to 10 mass % of a flaky pigment coated on a surface with a compound selected from the following A group, 0.05 to 5 mass % of layered clay mineral particles, 1 to 20 mass % of an acrylic copolymer in terms of a solid content and water and being filled in an applicator provided with a coating part having a brush: A group: cellulose, hemicellulose, lignin, chitin, chitosan.

Abstract: An object is to provide a writing implement allowing the width of a drawn line to be freely changed by writing pressure that is capable of application to a narrow-shafted felt-tip pen or marker pen. The writing implement includes a shall tube, an ink supply core that is housed inside the shaft tube and that guides ink by capillary action, and a core surrounding member that is fitted to a leading end of the shaft tube, that is penetrated by the ink supply core, and from which a tip of the ink supply core projects. The ink supply core is configured to retract at a tip of the core surrounding member under writing pressure, and a projection dimension of the ink supply core from the tip of the core surrounding member is from 0.05 mm to 0.7 mm.

Abstract: A water-based ballpoint pen contains an aqueous ink composition in which resin particles having an average particle diameter of at least 0.3 ?m are blended. The water-based ballpoint pen is provided with a ballpoint pen tip including a writing ball. The writing ball is formed from a mixture that includes a hard phase component comprising tungsten carbide, a binder phase component comprising cobalt and nickel, and chromium.

Abstract: A mechanical pencil includes a ball chuck, a rotation drive mechanism having a rotary part and receiving an axial direction retraction operation due to writing pressure received by the lead held by the ball chuck and an axial direction advance operation due to release of the writing pressure to drive the rotary part to rotate in one direction, a feed cam face having a ring-shaped cam face vertical to the axial direction and an axial direction step part, and a slider having an abutting part abutting against the feed cam face and a holding chuck holding a lead and rotating upon receiving a rotation drive force of the rotary part, which is configured so that the lead held by the holding chuck is pulled out from the ball chuck due to the advance operation of the slider.

Abstract: An ink reservoir unit for a writing instruments using an ink reservoir tube with which low contamination can be achieved considering environmental problems; and a writing instruments using the same. The ink reservoir tube is composed of a composite material in which a raw material is layered on a paper substrate having paper as a substrate. One end section of the ink reservoir tube is coupled to a connection part formed on a writing member or a relay member that holds the writing member to constitute the ink reservoir unit for a writing instrument. In one preferred aspect, a locking means using a male thread formed on an outer peripheral surface is provided to the connection part to be connected to the ink reservoir tube, and the ink reservoir tube is coupled to the relay member that holds the writing member by the locking means.

Abstract: Provided is an ink composition for water-based ballpoint pens, which can provide excellent low-viewing angle visibility on a dark-colored writing surface and drawing lines with good luster. The ink composition for water-based ballpoint pens according to the present invention includes at least an aluminum pigment and titanium oxide-enclosing resin particles having an average particle size from 0.5 to 3 ?m.