Abstract: A water based ink composition for a writing instrument containing at least one selected from the group consisting of alkylene oxide adducts of polyglycerin, alkylene oxide adducts of glycerin and alkylene oxide adducts of trimethylolpropane and further containing a colorant, a perfume and water, which is less liable to cause feathering of the lines and in which a perfume is dispersed and retained in an aqueous medium in a stable state and the fragrance lasts long.

Abstract: A water based white color tone pigment ink for a ballpoint pen comprising titanium oxide having an oil absorption of 25 (g/100 g) or less and an average particle diameter of 400 nm or less, a water soluble resin, a thickener, water and a polar solvent, which can provide drawn lines to be excellent in developing colors such as a white color and a poster color regardless of a color tone of writing paper and which can cover or correct drawn lines printed by means of a writing instrument, a type writer and a copying machine.

Abstract: Provided is a liquid cosmetic characterized by comprising 5 to 25% by weight of a pearl pigment containing at least mica, mica titan or a surface-treated substance thereof and 0.2 to 2.0% by weight of an anionic high molecular compound as a structural viscosity-providing agent, wherein the non-Newtonian viscosity index (n) falls in a range of 0.16≦n≦0.28, and the viscosity satisfies the following condition (A): (A) shear rate (S−1) viscosity (mPa · s) 3.83 1500 to 5000 19.20   500 to 1500 38.30 300 to 700 76.80 150 to 400 383.00   50 to 100.

Abstract: In a capless writing instrument with its writing element arranged in the barrel cylinder so that a writing point of the writing element can come out and retract through a front-end opening of the barrel cylinder, an inner cap having a dome-like convex portion projected frontwards is arranged at the front-end part of the barrel cylinder, and the inner cap is formed of rubber or elastic resin, a slit-forming groove having a thin-film portion at the depressed bottom of the slit is formed from a position at the root of the dome-like inner cap to the opposite position at the root intersecting the substantially center of the convex portion.

Abstract: The writing instrument having an excellent cap-off performance is characterized, as shown in, for example, FIG. 3, by that in a writing instrument 10 having a pen tip 13 comprising a fibrous feed or a plastic feed, the pen tip 13 described above is coated with a substance which is solid at room temperature and in which a solubility in an ink solvent is 10% or less at room temperature among substances providing the pen tip with a cap-off property. This writing instrument 10 is such excellent in a cap-off performance that the good writing performance is obtained even after the pen tip is left standing in the air over a long period of time.

Abstract: A water based ink composition for a writing instrument containing a lecithin derivative and further containing a colorant, a perfume and water, which is less liable to cause feathering of the lines and in which a perfume is dispersed and retained in an aqueous medium in a stable state and the fragrance lasts long.

Abstract: Provided is a water based ink composition for a ball point pen comprising at least one selected from the group consisting of an alkylene oxide adduct of polyglycerin, an alkylene oxide adduct of glycerin and an alkylene oxide adduct of trimethylolpropane and further comprising a colorant, a white plastic pigment, a viscosity-controlling agent and water. The ink composition is excellent in a writing property as well as a coloring property of the drawn lines regardless of the kind of writing paper and is stable with the passage of time. In addition thereto, it provides the drawn lines with a color having the same color tone as that of the visual color when it is charged into an ink reservoir.

Abstract: A free-ink type writing instrument includes: an ink tank for holding ink; a temporary ink collector for temporarily retaining the ink flowing out from the ink tank; a partitioning wall separating the ink tank and the temporary ink collector; and a pen core disposed from the ink tank, penetrating through the partitioning wall and the ink collector so as to allow ink to flow out from the ink tank, and is characterized in that the storage volume Vc of the ink collector and the ink tank volume Vo satisfy the relation Vc≧0.18 Vo.

Abstract: A additive for an oil based ink for a ball point pen containing at least one or plural kinds of organic solvents, a resin and an inorganic fine particle thickener, wherein the additive has a viscosity of 1000 mPa·s or more at a shear rate of 5/s and at 0° C. and a viscosity of 50000 mPa·s or less at a shear rate of 5/s and at 50° C., and has an absorbance of from 0.01 to 5 at a wavelength of 900 nm when a cell is 1 cm long. This additive is added to an oil based ink for a ball point pen such that an amount of the additive becomes 0.1 to 30% by weight based on the total ink.

Abstract: A direct-feed type writing implement having two ends includes an ink tank and a pair of writing points, arranged at opposite ends of the ink tank. An ink collector is provided for each writing point. An air/liquid exchanger adjusts the internal pressure inside the ink tank by use of capillarity. An ink feeder is provided for each writing point. Each ink feeder includes a center core for feeding ink to the writing point. Air is inhibited from flowing into the ink tank through the ink collector air/liquid exchanger located at one end while the pen is being used for writing at the opposite end.

Abstract: A click type writing implement includes: a ball-pen refill composed of a point assembly at the front end thereof, an ink storage at the rear thereof and a pressurizing mechanism of a pumping type at the rear of the ink storage; an arrangement for holding the refill and engaging it so as to allow the tip of the point assembly to be projected from and retracted into the front end; and a clicking mechanism for keeping the tip of the point assembly projected, the clicking mechanism comprising: a first clicking mechanism for advancing and contracting ink by a short stroke and a second clicking mechanism for advancing and contracting ink by a large stroke, so that the rear end of ink can be pressurized at two levels so as to promote flow of ink toward the point assembly.

Abstract: A writing implement having a cap member is provided and is a direct-flow type (liquid ink type) writing implement including: a barrel cylinder; a holder holding a pen core at a front end of the barrel cylinder and further having inside the barrel cylinder, an ink tank for storing a liquid ink and a collector for temporary retention thereof. The collector, barrel cylinder and ink tank are formed of a clear, transparent material. A mouthpiece at the outer periphery of the holder is formed of a resin material having the same color as the ink held in the ink tank or having the same color as the written ink. The barrel cylinder may have a partition wall, positioned near to the center, on the side (rear side) opposite to the position where the collector is arranged, forming an ink tank in a space inside the barrel between the rear end plate of the collector and the partition wall.

Abstract: A liquid cosmetic comprising a non-water soluble principal solvent A, a water soluble auxiliary solvent B, a preservative C and a coloring component D as essential components, wherein the principal solvent A is not substantially miscible with the auxiliary solvent B, and the auxiliary solvent B is dispersed in the principal solvent A; and most of the preservative C is distributed into the dispersed auxiliary solvent B. The principal solvent A is preferably selected from octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane; the auxiliary solvent B is preferably selected from propylene glycol, 1,3-butylene glycol and dipropylene glycol; and the preservative C is preferably selected from Parabens. Provided is the nonaqueous liquid cosmetic which inhibits putrefaction by microorganisms even if droplets of sweat and saliva are introduced into the cosmetic and which is free of bittersweet felt unpleasant by a user.

Abstract: Provided is a free ink type writing instrument having an ink tank part for storing an ink, in which an amount of the ink can visually be observed. The free ink type writing instrument is characterized by that the whole or a part of an internal surface part in contact with the ink in the ink tank part has a smaller critical surface tension than a surface tension of the ink, and a contact angle between the ink and the whole or a part of the internal surface part in contact with the ink in the ink tank part is 30° or more at a temperature of 25° C.

Abstract: Provided is an aqueous gel ink-filled ball point pen having less blobbing and capable of drawing stable lines having vivid color and no uneven written intensity. The aqueous gel ink-filled ball point pen has a ball of a diameter of 0.6 to 2.0 mm at a tip point with an aqueous gel ink containing a pigment whose specific gravity is 2 or more and having a viscosity ratio (a value of (viscosity at 10 rpm)/(viscosity at 50 rpm) measured by means of an E type rotational viscometer) of 3.0 to 5.0, and an ink lay down value according to JIS Standard S6053 which is controlled to 220 to 800 mg/m.

Abstract: An oil based red ink for a ball point pen comprising at least one organic solvent selected from the group consisting of alcohols and glycol ethers, a resin and a colorant, wherein the spectral reflectance determined in the state where the ink for a ball point pen described above is filled into an ink reservoir is 20% or more at least in a longer wavelength area than 620 nm; and a spectral reflectance-rapid increase area which is the area where a difference between a spectral reflectance in the area and an average spectral reflectance in 400 to 560 nm is plus 4% or more is present between 580 to 600 nm. A color of this ink can be identified from the appearance through a barrel of the ball point pen, and the color thereof is close to the drawn line color obtained in writing.

Abstract: Provided is an aqueous gel ink-filled ball point pen having less blobbing and capable of drawing stable lines having vivid color and no uneven written intensity. The aqueous gel ink-filled ball point pen has a ball of a diameter of 0.6 to 2.0 mm at a tip point with an aqueous gel ink containing a pigment whose specific gravity is 2 or more and having a viscosity ratio (a value of (viscosity at 10 rpm)/(viscosity at 50 rpm) measured by means of an E type rotational viscometer) of 3.0 to 5.0, and an ink lay down value according to JIS Standard S6053 which is controlled to 220 to 800 mg/m.

Abstract: Provided is a liquid cosmetic characterized by comprising 5 to 25% by weight of a pearl pigment containing at least mica, mica titan or a surface-treated substance thereof and 0.2 to 2.0% by weight of an anionic high molecular compound as a structural viscosity-providing agent, wherein the non-Newtonian viscosity index (n) falls in a range of 0.16≦n≦0.28, and the viscosity satisfies the following condition (A): 1 (A) shear rate (S−1) viscosity (mPa · s) 3.83 1500 to 5000 19.20  500 to 1500 38.30  300 to 700 76.80  150 to 400 383.

Abstract: A collector for adjusting internal pressure of a writing implement offers improvements in deficiency prevention performance such as the capability of preventing ink leakage from occurring due to influence of the ambient pressure being varied during usage or when its cap is put on and off, the capability of preventing ink from erupting or leaking forward when the implement has been stored at a shop for a long period, and which still provides smooth writing comfort during writing. A collector (106) introduces ink through an ink channel (114) by the function of capillary action and temporarily holds ink in ink retaining grooves (113) and establishes air passage in the axial direction and radial direction by the combination of the air channel (115) and retaining grooves (113). The air channel is continuously formed so as to zigzag with a multiple number of turns with respect to axial direction of collector (106) by way of air channel parts (115a, 115b, 115c and 115d) and connecting passages (122a, 122b and 122c).

Abstract: An ink reservoir which can allow a visual color to display a blue color without coloring the ink reservoir with a specific colorant. It is an ink reservoir for a ball point pen, in which fine particles for scattering light are contained in a resin composing the ink reservoir for a ball point pen and which makes it possible to transmit light.