Abstract: An aqueous ink composition for writing instruments containing an aqueous dispersion of colored resin fine particles, the colored resin fine particles containing at least a cyclohexyl (meth)acrylate monomer and a basic dye or an oil-soluble dye, the cyclohexyl (meth)acrylate monomer being contained in an amount of 30 mass% or greater relative to an amount of a polymerizable polymer component in the colored resin fine particles, and the colored resin fine particles further containing a terpene phenol resin.

Abstract: Provided is an aqueous dispersion of colored particles suitable for colorants for writing instrument inks, inkjet inks, painting materials, aqueous coatings, and the like. The aqueous dispersion of colored particles includes a polymer having at least a unit of a monomer derived from a dye having a polymerizable unsaturated group. The monomer derived from the dye is preferably derived from the compound represented by General Formula (1) below: where Dye represents a dye residue, R1 represents a hydrogen atom or a methyl group, Y2 represents —O— or —NR10—, where R10 represents a hydrogen atom or an alkyl group, A1 represents an alkylene group which is unsubstituted or substituted by at least one group selected from —OCO—, —COO—, —NHCONH—, and the like in the chain thereof and/or at the terminal thereof, and/or a hydroxy group.

Abstract: A calcined solid drawing material may be capable of drawing a line excellent in color development and transparent while having a high strength regardless of a black core or a colored core. The calcined solid drawing material may include a skeleton core including at least an extender and a binder component, and a drawn line permeability T of the drawn line is 0.8 or more, as calculated by Equation (I): T=(L*w?L*b)/(L*b?L*p)??(I), wherein L*w is brightness of a drawn line written on white paper, L*b is brightness of a drawn line written on a black paper, and L*p is brightness of the black paper.

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 device 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 device.

Abstract: An ink composition for a water-based ballpoint pen including at least a black pigment and borneol, the black pigment satisfying requirements X to Z below: X: 50% particle size (D50) in a cumulative particle size distribution in terms of volume being 0.2 to 1.0 ?m, Y: 10% particle size (D10) in a cumulative particle size distribution in terms of volume being 0.1 to 0.3 ?m, and Z: 90% particle size (D90) in a cumulative particle size distribution in terms of volume being 1.0 to 5.0 ?m.

Abstract: A writing tool includes a refill having an ink reservoir tube formed to be a straight cylinder whose wall thickness is less than 0.56 mm; and a writing tip or a relay member holding the writing tip attached to a first end of the ink reservoir tube, wherein the refill is detachably attached to a barrel, wherein in the refill, amounting strength between the writing tip or the relay member holding the writing tip and the ink reservoir tube is set higher than a mounting strength between the barrel and a connecting portion of the ink reservoir tube. There is provided a writing tool that can prevent the occurrence of a problem such as leakage of ink at a time of replacement of refills and perform replacement of refills smoothly.

Abstract: Provided is an oil-based ink composition for writing instruments which has good properties for writing on writing surfaces of various materials and which has improved friction resistance against friction from retracing of letters that have already been written and against stronger friction forces.

Abstract: To provide a hair applicator which can fix an applying part to combing elements with a sufficient fixing strength to prevent the applying part from being displaced even by an impact from a fall and also can dispense a sufficient coating amount. The hair applicator is configured such that the coating amount by the applying part is 0.090 g/m or greater (porosity is 80% or higher) and the hardness (ISO7619A) of the applying part is less than A70.

Abstract: To provide an aqueous ink composition for ballpoint pen having excellent ink discharge properties at the initial writing (initial touch) even after exposure of the pen tip for a long period of time. The aqueous ink composition for ballpoint pen contains at least 0.1 to 5% by mass of a graft compound of an allyl alcohol-maleic anhydride-styrene copolymer composed of: (a) a polyoxyalkylene alkyl ether unit represented by Formula (I), (b) a maleic anhydride unit, and (c) a styrene unit, the allyl alcohol-maleic anhydride-styrene copolymer having the composition ratio (a):(b):(c) of 25 to 75:25 to 75:0 to 50% by mol and having a mass average molecular weight from 1000 to 50000, and polyoxyalkylene monoalkyl alcohol; 5 to 40% by mass of resin particles; and water; wherein in Formula (I), R represents an alkyl group having 1 to 5 carbons, and m is a positive number of 5 to 50.

Abstract: A marking pen, comprising: a shaft cylinder; a porous pen core accommodated in the shaft cylinder, and configured to project from, and retract into, an opening part provided at a tip end of the shaft cylinder; an inner cotton accommodated in the shaft cylinder, and filled with an aqueous ink composition to be fed to the pen core, the aqueous ink composition including a water soluble organic solvent in an amount of from 20 mass % to 60 mass %; and a delivery mechanism configured to cause a tip end of the pen core to project from, and retract into, the opening part.

Abstract: A brush tip for a cosmetic applicator which is hygienic by preventing the growth of bacteria and other germs in the area of the brush tip not impregnated with the application fluid, as well as the manufacturing method of the brush tip and a cosmetic applicator using the brush tip. This brush tip for a cosmetic applicator includes brush tip filaments and serving as an applying part of the cosmetic applicator having a cosmetic storage for storing a cosmetic fluid, with the rear end of the brush tip attached to the front end of the cosmetic storage. The brush tip incorporates a discharge port that communicates with the cosmetic storage of the cosmetic applicator, and a coating of an antimicrobial agent is formed on the surface of the brush tip filaments, located behind the discharge port inside the brush tip.

Abstract: A coloring tablet may have excellent solubility and redispersibility and a water-based ink composition for a writing instrument. Such a coloring tablet may contain at least a colorant and a dispersing agent. The dispersing agent may include a hydroxide neutralization product of an (meth)acrylic resin, a hydroxide neutralization product of a styrene-maleic acid copolymer resin, a polyoxyethylene-based surfactant, an alkyl condensed ring sulfonate, an amine ethylene oxide propylene oxide adduct, and/or a isobutylene-based polymer.

Abstract: An ink composition for a water-based ballpoint pen and a water- based ballpoint pen, which have stable ink flowability even in a so-called fine ballpoint pen, have excellent luster of drawn lines, and do not cause a ball to fall off. The ink composition for a water-based ballpoint pen according to the present invention contains at least an aluminum pigment and 8 to 25 mass% of solid urethane particles with an average particle size of 0.3 to 10 ?m. In addition, a water-based ballpoint pen according to the present invention is provided with the ink composition for a water-based ballpoint pen that has the above composition.

Abstract: A cosmetic applicator that can alleviate the shock at its barrel cylinder even if the center of gravity of the applicator is on the rear side. In the cosmetic applicator having an applying part provided at the front end of the barrel cylinder and a cosmetic stored in the rear of the barrel cylinder, a resilient member is mounted to the rear end of the barrel cylinder.

Abstract: 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 ?m and a naphthalenesulfonic acid-formaldehyde condensate.

Abstract: Provided is a dispersion liquid of colored resin fine particles for an aqueous ink having excellent stability and a sufficient drawn line intensity; an aqueous ink composition for a writing instrument such as felt-tip pens, marking pens, and ballpoint pens using the dispersion liquid of the colored resin fine particle as a colorant; and a writing instrument loaded with the composition. The dispersion liquid of colored resin fine particles for an aqueous ink includes colored resin fine particles dispersed in water, the colored resin fine particles composed of at least a cyclohexyl (meth)acrylate monomer, and a basic dye or an oil-soluble dye, in which the content of the cyclohexyl (meth)acrylate monomer is 30% by mass or more, and the content of the basic dye or the oil-soluble dye is 15% by mass or more based on the total polymer component constituting the colored resin fine particles.

Abstract: An aqueous ink composition suitable for ballpoint pens may achieve excellent smooth writing without causing deterioration of the smooth writing and wear of a tip socket while colored resin particles encapsulating a pigment are used. An embodiment of such ink compositions is an aqueous ink composition suitable for ballpoint pens containing at least colored resin particles (A) encapsulating a pigment (a) and non-colored resin particles (B) containing no pigment.

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).