Lip cosmetics

Abstract

To provide a labial cosmetic that develops a fresh color even when applied to dull lips, giving a beautiful natural finish.SOLUTION: A labial cosmetic contains following components (A), (B) and (C): (A) plate-like particles coated with Lithol rubine BCA of 0.01-15 mass%; (B) Lithol rubine BCA of 0.001-5 mass%, excluding (A); and (C) paste oil with a melting point of 33-60°C of 0.5-18 mass%, including paste oil with a melting point of 33-55°C of 75 mass% or more.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to lip cosmetics.

Background Art

[0002] In lip cosmetics, when applied to the lips, it is required to have excellent color development and a beautiful finish. For example, Patent Document 1 describes that a lip cosmetic containing plate-like powder coated with Red No. 202, Red No. 202 other than this, liquid hydrocarbon oil, and liquid higher alcohol suppresses the conspicuousness of color unevenness immediately after application and provides a uniform finish. Further, Patent Document 2 describes that a lip cosmetic containing plate-like powder coated with a pigment selected from Yellow No. 4 and Blue No. 1, a pigment selected from Yellow No. 4 and Blue No. 1 other than this, and further plate-like powder coated with Red No. 202 and an oil agent has a uniform finish in color tone and gloss immediately after application and maintains vividness.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0005] The inventors have discovered that by combining plate-shaped powder coated with Red No. 202 with a Red No. 202 coloring agent, and further using a specific paste oil, it is possible to obtain a lip cosmetic that provides vivid color and a beautiful, natural finish, even when applied to dull lips.

[0006] The present invention comprises the following components (A), (B), and (C): (A) Plate-shaped powder coated with Red No. 202, 0.01-15% by mass, (B) Component (A) excluding Red No. 202, 0.001 to 5% by mass, (C) Contains 75% or more by mass of paste oil with a melting point of 33-55°C, and 0.5-18% by mass of paste oil with a melting point of 33-60°C. This relates to lip cosmetics containing [a specific ingredient / product]. [Effects of the Invention]

[0007] The lip cosmetic of the present invention provides a beautiful, natural finish with vibrant color even on dull lips, and the vibrant color lasts for a long time. [Modes for carrying out the invention]

[0008] The component (A) used in this invention is a plate-shaped powder coated with Red No. 202. Red No. 202 is a coloring pigment commonly used in cosmetics, and its generic name is "Lysol Rubin BCA". This Red No. 202 may also be dispersed in barium sulfate to improve color development, or rosin may be added as a dispersion aid. Examples of substrates for plate-shaped powders include natural or synthetic inorganic powders such as talc, silica, sericite, mica, synthetic fluorphlogopite, glass, kaolin, bismuth oxychloride, cerium oxide, calcium sulfate, barium sulfate, magnesium sulfate, alumina, titanium oxide, and iron oxide. Among these, talc, mica, synthetic phlogopite, and glass are preferred, with mica and synthetic phlogopite being more preferred. Furthermore, composite powders can be used in which metal oxides such as titanium dioxide, iron oxide, and anhydrous silicic acid are coated on the surface of the plate-shaped powder. Specific examples of composite powders include titanium mica, iron oxide-coated mica, iron oxide-coated titanium mica, titanium oxide-coated synthetic fluorphlogopite, iron oxide-coated synthetic fluorphlogopite, iron oxide / titanium oxide-coated synthetic fluorphlogopite, titanium oxide-coated glass powder, iron oxide-coated glass powder, iron oxide / titanium oxide-coated glass powder, titanium oxide-coated alumina, iron oxide-coated alumina, iron oxide / titanium oxide-coated alumina, and titanium oxide / anhydrous silicic acid-coated mica, with titanium mica and titanium oxide-coated synthetic fluorphlogopite being preferred.

[0009] The plate-like powder is preferably in the form of thin flakes, and the average particle size is preferably 5 to 100 μm, and more preferably 5 to 60 μm, from the viewpoint of ensuring that the lipstick color develops vividly even on dull lips, the color lasts, and provides a beautiful and natural finish. The aspect ratio is preferably 15 to 200, and more preferably 20 to 100. In this invention, the average particle diameter is measured by electron microscopy and a particle size distribution analyzer using the laser diffraction / scattering method. Specifically, in the case of the laser diffraction / scattering method, ethanol is used as the dispersion medium, and the particle size distribution analyzer (e.g., LA-920, manufactured by Horiba, Ltd.) is used to measure the particle size, with the 50% median diameter being taken as the average particle diameter. The thickness is measured by measuring the difference from a reference plane using an atomic force microscope, and the arithmetic mean is taken as the average thickness. Furthermore, the aspect ratio is calculated from the ratio of the average particle diameter to the average thickness, and is defined as aspect ratio = average particle diameter / average thickness.

[0010] The amount of Red No. 202 coating on the plate-shaped powder is preferably 0.5 to 30% by mass, more preferably 1 to 25% by mass, and even more preferably 2 to 17% by mass, of the total amount of component (A), from the viewpoint of ensuring that even dull lips develop a vivid lipstick color, the color lasts, and a beautiful, natural finish. The breakdown of Red No. 202 in the total amount of component (A) will be described below as the amount of Red No. 202 coating.

[0011] Examples of such plate-shaped powders include Cellini Red (manufactured by BASF, mica titanium substrate, 6-48 μm, coated with 13% by mass of Red No. 202), C91-1231 INTENZA Razzled Rose (manufactured by DIC, mica titanium substrate, 10-60 μm, coated with 10% by mass of Red No. 202), C91-1232 INTENZA Haute Pink (manufactured by DIC, mica titanium substrate, 10-60 μm, coated with 10% by mass of Red No. 202), C91-1233 INTENZA Electric Coral (manufactured by DIC, mica titanium substrate, 10-60 μm, coated with 12% by mass of Red No. 202), C91-1234 INTENZA Magentitude (manufactured by DIC, mica titanium substrate, 10-60 μm, coated with 5% by mass of Red No. 202), and C91-4232 INTENZA. There are two types: Cerise (manufactured by DIC Corporation, titanium dioxide coated synthetic fluorphlogopite substrate, 10-60 μm, coated with 10% by mass of Red No. 202) and C91-4234 INTENZA Tourmalink (manufactured by DIC Corporation, titanium dioxide coated synthetic fluorphlogopite substrate, 10-60 μm, coated with 5% by mass of Red No. 202).

[0012] Component (A) can be used in one or more forms. From the viewpoint of ensuring that the lipstick color develops vividly even on dull lips, the color lasts, and provides a beautiful, natural finish, the content should be 0.01% by mass or more, preferably 0.1% by mass or more, and more preferably 1% by mass or more, in the total composition. It should also be 15% by mass or less, preferably 13% by mass or less, and more preferably 12% by mass or less, from the same viewpoint. Furthermore, the content of component (A) in the total composition should be 0.01 to 15% by mass, preferably 0.1 to 13% by mass, and more preferably 1 to 12% by mass.

[0013] Component (B), Red No. 202, is used as a coloring pigment and its common name is "Lysol Rubin BCA." It is also used as a coating agent for component (A). This Red No. 202 may be dispersed in barium sulfate to improve color development, or rosin may be added as a dispersion aid. When used in combination with ingredient (A), ingredient (B) allows lipstick to develop a vibrant color, maintain its color, and provide a beautiful, natural finish, even on dull lips. Red No. 202 can be used as is, or it can be used after hydrophobic or hydrophilic treatment. Furthermore, component (A) may also be subjected to hydrophobic or hydrophilic treatment, similar to component (B).

[0014] The hydrophobic treatment is not limited to any treatment applied to ordinary cosmetic powders, and surface treatment agents such as fluorine compounds, silicone compounds, metal soaps, amino acid compounds, lecithin, alkylsilanes, oils, and organic titanates can be used, and dry or wet treatments can be performed. Specific examples of surface treatment agents include fluorine-based compounds such as perfluoropolyethers, perfluoroalkyl phosphates, perfluoroalkylalkoxysilanes, and fluorine-modified silicones; silicone-based compounds such as dimethylpolysiloxane, methylhydrogenpolysiloxane, cyclic silicones, organopolysiloxanes with one or both trialkoxy groups, cross-linked silicones, silicone resins, fluorine-modified silicone resins, and acrylic-modified silicones; and aluminum stearate, aluminum myristate, zinc stearate, and magnesium stearate. Examples include metal soaps such as um; amino acid compounds such as lauroyl lysine, proline, hydroxyproline, alanine, glycine, sarcosine, glutamic acid, aspartic acid, lysine and their derivatives; lecithin, hydrogenated lecithin; alkylsilanes such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, octyltrimethoxysilane, octyltriethoxysilane, and triethoxycaprylylsilane; oils such as polyisobutylene, waxes, and fats; and organic titanates such as isopropyltriisostearoyl titanate.

[0015] Furthermore, the hydrophilization treatment is not limited to any treatment that is normally applied to cosmetic powders. For example, plant-based polymers such as gum arabic, tragacanth, arabinogalactan, locust bean gum (carob gum), guar gum, karaya gum, carrageenan, pectin, agar, quince seed (medlar), starch (rice, corn, potato, wheat), algocolloid, trant gum, locust bean gum, etc.; microbial polymers such as xanthan gum, dextran, succinoglucan, pullulan, etc.; animal-based polymers such as collagen, casein, albumin, deoxyribonucleic acid (DNA) and its salts, etc.; starch-based polymers such as carboxymethyl starch, methyl hydroxypropyl starch, etc.; cellulose-based polymers such as methyl cellulose, ethyl cellulose, methyl hydroxypropyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, nitrocellulose, sodium cellulose sulfate, sodium carboxymethyl cellulose, crystalline cellulose, cellulose powder; alginate-based polymers such as sodium alginate, propylene glycol alginate ester, etc.; vinyl-based polymers such as polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymer, etc.; polyoxyethylene-based polymers such as polyethylene glycol, polyethylene glycol silane, etc.; polyoxyethylene polyoxypropylene copolymer-based polymers; acrylic-based polymers such as sodium polyacrylate, polyethyl acrylate, polyacrylamide, etc. Furthermore, inorganic silicate-based compounds such as silica are also included.

[0016] The hydrophobic treatment and hydrophilic treatment can be carried out according to ordinary methods. From the viewpoint of improving the dispersibility in oil, amino acid-based compounds, alkyl silane, and organic titanate treatment are preferred, and lauroyl lysine and isopropyl triisostearoyl titanate treatment are more preferred. From the point of view of improving the dispersibility in the solvent, the treatment amount of the hydrophobic treatment and hydrophilic treatment is preferably 0.1 to 15% by mass, more preferably 3 to 12% by mass, based on the amount of Red No. 202.

[0017] The content of component (B) does not include the amount of Red No. 202 used as the coating material in component (A). From the viewpoint of vividly developing the lipstick color, maintaining the color development, and imparting a beautiful and natural finish even for dull lips, the content of component (B) is 0.001% by mass or more, preferably 0.01% by mass or more, more preferably 0.05% by mass or more, 5% by mass or less, preferably 3% by mass or less, and more preferably 1% by mass or less in the whole composition. Further, the content of component (B) is 0.001 to 5% by mass, preferably 0.01 to 3% by mass, and more preferably 0.05 to 1% by mass in the whole composition.

[0018] In the present invention, the mass ratio (A) / (B) of component (A) to component (B) is preferably 10 or more, more preferably 15 or more, further preferably 25 or more, preferably 100 or less, more preferably 80 or less, and further preferably 65 or less from the viewpoint of vividly developing the lipstick color, maintaining the color development, and imparting a beautiful and natural finish even for dull lips. Further, the mass ratio (A) / (B) of component (A) to component (B) is preferably 10 to 100, more preferably 15 to 80, and further preferably 25 to 65.

[0019] Component (C) used in the present invention is a paste oil having a melting point of 33 to 60°C, containing 75% by mass or more of a paste oil having a melting point of 33 to 55°C. In this invention, the melting point is measured by the method described in Method 3 of the General Test Methods for Cosmetic Raw Materials Standards. Specifically, the sample is gradually heated to 90-92°C while stirring to melt it, then the heating is stopped and the sample is allowed to cool to a temperature 8-10°C above its melting point. Next, the thermometer (a petrolatum melting point thermometer as specified in Japanese Industrial Standard B7410) is cooled to 5°C, the moisture is wiped off with filter paper, half of the mercury bulb is inserted into the sample, and then immediately removed. The sample is kept vertical and allowed to cool. When the attached sample becomes cloudy, it is immersed in water at a temperature of 16°C or lower for 5 minutes. Next, the thermometer is inserted into the test tube and secured with a cork so that the distance between the lower end of the thermometer and the bottom of the test tube is 15 mm. The test tube is placed in a 500 mL beaker containing water at approximately 16°C, with the bottom of the test tube fixed 15 mm from the bottom of the beaker. The water is heated at a rate of 2°C per minute until the water temperature reaches 30°C. Then, heating is continued at a rate of 1°C per minute, and the temperature is measured when a drop of the sample leaves the thermometer. This test is performed three times. If the difference in measurements is less than 1°C, the average value is taken. If the difference is 1°C or more, five measurements are taken and the average value is taken.

[0020] The paste oil in component (C) is not limited to those commonly used in cosmetics, for example, petrolatum (57°C), Japanese wax (60°C), synthetic Japanese wax (53°C), vinyl leather wax (54°C), hexa(behenic acid / benzoic acid / ethylhexanoic acid) dipentaerythrityl (52°C), cholesteryl hydroxystearate (52°C), tetra(hydroxystearate / isostearate) dipentaerythrityl (50°C), hydrogenated palm oil (47°C), hexahydroxystearate dipentaerythrityl (45°C), tri(caprylic / capric acid / myristic acid / stearic acid) glyceryl (40°C), hexa(hydroxystearate) Examples include dipentaerythrityl oleate (37°C), phytosteryl oleate (33°C), glyceryl ethylhexanoate (31°C), dioctyldodecyl lauroyl glutamate (33°C), phytosteryl dimer dilinoleyl dimer dilinoleate (34°C), bis(behenyl dimer dilinoleyl dimer dilinoleate (38°C), hard lanolin (49°C), reduced lanolin (45°C), bis-diglyceryl polyacyladipate-2 (39°C), etc. (the melting point is shown in parentheses).

[0021] From the viewpoint of ensuring that lipstick color develops vividly and lasts, even on dull lips, and that the paste oil of component (C) provides a beautiful and natural finish, it is preferable that component (C) contains 75% by mass or more of paste oil with a melting point of 33-55°C, preferably 80% by mass or more, and more preferably 90% by mass or more.

[0022] The content of component (C) is preferably 0.5% by mass or more, more preferably 1% by mass or more, more preferably 2% by mass or more, and more preferably 18% by mass or less, more preferably 16% by mass or less, and more preferably 14% by mass or less, from the viewpoint of ensuring that even dull lips can have vivid lipstick color, long-lasting color, and a beautiful, natural finish. Furthermore, the content of component (C) is preferably 0.5 to 18% by mass, more preferably 1 to 16% by mass, and more preferably 2 to 14% by mass, from the viewpoint of ensuring that even dull lips can have vivid lipstick color, long-lasting color, and a beautiful, natural finish.

[0023] The lip cosmetic of the present invention may further contain an oil that is liquid at 25°C. Here, "liquid at 25°C" means that it is fluid at 25°C and has a melting point of 32°C or lower. Examples of liquid oils at 25°C include those commonly used in cosmetics, such as hydrocarbon oils, ester oils, and higher alcohols. Examples of hydrocarbon oils that are liquid at 25°C include linear or branched hydrocarbon oils such as liquid paraffin, light isoparaffin, light liquid isoparaffin, liquid isoparaffin, hydrogenated polyisobutene, mineral oil, polybutene, polyisobutene, hydrogenated polydecene, squalane, and squalene. Of these, hydrogenated polyisobutene and hydrogenated polydecene are preferred, and hydrogenated polyisobutene is more preferred, from the viewpoint of providing vivid color development, long-lasting color development, and a beautiful, natural finish even on dull lips.

[0024] Examples of ester oils that are liquid at 25°C include isopropyl myristate, octyldodecyl myristate, isopropyl isostearate, isononyl isononanoate, butyl stearate, oleyl oleate, isotridecyl isononanoate, isostearyl myristate, octyldodecyl ricinoleate, diglyceryl monoisostearate, ethylhexyl palmitate, cetyl ethylhexanoate, ethylhexyl methoxycinnamate, tocopheryl acetate, propylene carbonate, diisostearyl malate, and dicapric acid. Neopentyl glycol, neopentyl glycol diethylhexanoate, diglyceryl diisostearate, propanediol diisostearate, glyceryl monomyristate monoisostearate, glyceryl triisostearate, di(caprate / caprylate)propanediol, tri(caprylate / caprate)glyceryl, triethylhexanoin, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythrityl tetraoctanoate, tetraethylhexanoin Pentaerythrityl tetraisostearate, pentaerythritol tetraisostearate, polyglyceryl-2 isostearate, polyglyceryl-2 diisostearate, polyglyceryl-2 triisostearate, polyglyceryl-2 tetraisostearate, polyglyceryl-6 octacaprylate, (isostearate / sebacate) ditrimethylolpropane oligoester, dipentaerythrityl tripolyhydroxystearate, phytosteryl / octyldodecyl lauroyl glutamate, trehalose isostearate Examples of ester oils include ethyl esters such as tetraisostearate dipentaerythrityl, pentaisostearate dipentaerythrityl, hydroxystearate ethylhexyl, phytosterol fatty acid esters, cholesterol fatty acid esters, polyglycerin fatty acid esters, and pentaerythritol fatty acid esters; and vegetable oils such as avocado oil, macadamia nut oil, olive oil, rapeseed oil, sesame oil, wheat germ oil, linseed oil, cottonseed oil, soybean oil, palm oil, coconut oil, castor oil, jojoba oil, sunflower oil, camellia oil, and corn oil.

[0025] Of these, octyldodecyl myristate, diisostearyl malate, neopentyl glycol dicaprate, isotridecyl isononanoate, isononyl isononanoate, dipentaerythrityl tetraisostearate, phytosteryl / octyldodecyl lauroyl glutamate, ethylhexyl methoxycinnamate, caprylic / capric triglyceride, polyglyceryl-2 diisostearate, ethylhexyl hydroxystearate, and propylene carbonate are preferred, with diisostearyl malate, isotridecyl isononanoate, dipentaerythrityl tetraisostearate, caprylic / capric triglyceride, and polyglyceryl-2 diisostearate being more preferred, as these allow the lipstick color to develop vividly, last for a long time, and provide a beautiful, natural finish even on dull lips.

[0026] As a higher alcohol that is liquid at 25°C, a higher alcohol having 16 to 24 carbon atoms and a branched structure is preferred, such as decyltetradecanol, octyldodecanol, isostearyl alcohol, hexyldecanol, and oleyl alcohol. Of these, it is preferable that the lipstick contains at least octyldodecanol, as this ensures that even dull lips receive vibrant color, the color lasts, and a beautiful, natural finish.

[0027] One or more liquid oils at 25°C can be used, and their content is preferably 55% by mass or more, more preferably 60% by mass or more, even more preferably 65% ​​by mass or more, and also preferably 90% by mass or less, more preferably 87% by mass or less, and even more preferably 85% by mass or less, from the viewpoint of obtaining vivid lipstick color, a natural finish, and a good feel to use. Furthermore, the content of liquid oils at 25°C is preferably 55 to 90% by mass of the total composition, more preferably 60 to 87% by mass, and even more preferably 65 to 85% by mass.

[0028] The lip cosmetic composition of the present invention may further contain a wax that is solid at 25°C. Here, "solid at 25°C" means that it exhibits solid properties at 25°C and has a melting point of 61°C or higher. Furthermore, from the viewpoint of ease of melting when heated during formulation, the melting point is preferably 140°C or lower, more preferably 120°C or lower, and even more preferably 110°C or lower. Examples of such waxes include mineral waxes such as ozokerite and ceresin; petroleum waxes such as paraffin, microcrystalline wax, and petrolatum; synthetic hydrocarbon waxes such as Fischer-Tropsch wax, polyethylene wax, and synthetic waxes; plant-based waxes such as carnauba wax, candelilla wax, rice wax, wood wax, sunflower wax, and hydrogenated jojoba oil; animal waxes such as beeswax and whale wax; synthetic waxes other than hydrocarbons such as silicone wax, fluorine-based wax, and synthetic beeswax; fatty acids, higher alcohols, and their derivatives. Of these, paraffin, microcrystalline wax, and synthetic waxes are preferable from the viewpoint of suppressing oil seepage, providing appropriate hardness, moisture, and durability of the coating film.

[0029] One or more types of wax that solid at 25°C can be used, and the content is preferably 4% by mass or more, more preferably 5% by mass or more, even more preferably 6% by mass or more, preferably 20% by mass or less, more preferably 18% by mass or less, and even more preferably 15% by mass or less, from the viewpoint of suppressing oil seepage, providing appropriate hardness, moisture, and coating film durability in the total composition. Furthermore, the content of the wax that solid at 25°C is preferably 4 to 20% by mass in the total composition, more preferably 5 to 18% by mass, and even more preferably 6 to 15% by mass.

[0030] The lip cosmetic of the present invention may further contain coloring pigments other than components (A) and (B). As for coloring pigments, there are no restrictions as long as they are commonly used in cosmetics, and examples include metal oxides such as titanium dioxide, zinc oxide, yellow iron oxide, red iron oxide, black iron oxide, Prussian blue, ultramarine blue, chromium oxide, and chromium hydroxide; metal complexes such as manganese violet and cobalt titanate; inorganic pigments such as carbon black; synthetic organic pigments such as Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue No. 404; and natural organic pigments such as β-carotene, caramel, and paprika pigment. These coloring pigments, like components (A) and (B), can also be used after being treated to be hydrophobic or hydrophilic.

[0031] These coloring pigments can be used individually or in combination of two or more types. The content is preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, preferably 10% by mass or less, more preferably 7% by mass or less, and even more preferably 5% by mass or less. In addition, the content of coloring pigments other than components (A) and (B) is preferably 0.001 to 10% by mass, more preferably 0.01 to 7% by mass, and even more preferably 0.1 to 5% by mass.

[0032] The lip cosmetic of the present invention may further contain pearl pigment. As for the pearl pigment, any pigment commonly used in cosmetics may be used. For example, the surface of plate-like powders such as mica, synthetic phlogopite, glass powder, silica, and alumina may be coated with a coloring agent such as titanium dioxide, iron oxide, silicon dioxide, Prussian blue, chromium oxide, chromium hydroxide, gold, silver, carmine, or organic pigments.

[0033] In addition to the above-mentioned components, the lip cosmetic of the present invention may contain, to the extent that it does not impair the effects of the present invention, components commonly used in cosmetics, such as powders other than those mentioned above, oils other than those mentioned above, waxes other than those mentioned above, surfactants, lower alcohols, polyhydric alcohols, polymer compounds, ultraviolet absorbers, antioxidants, fragrances, preservatives, humectants, thickeners, water, etc.

[0034] The lip cosmetic of the present invention can be manufactured by conventional methods, for example, by heating and dissolving base materials other than colorants, mixing them uniformly, and then adding colorant materials and mixing further. Furthermore, the lip cosmetic of the present invention can be obtained in solid or non-solid form, with solid form being preferred. It can be used in the form of lipstick, lip balm, lip gloss, lip liner, and the like.

[0035] The lip cosmetic of the present invention particularly modifies the scattering coefficient in the 600nm to 700nm range. When light is absorbed by a pigment, it is converted into thermal energy, reducing the amount of light. However, when light is scattered, it hits the pigment and changes direction, but the amount of light does not decrease. Therefore, since dull lip colors tend to have a lower overall reflectivity compared to non-dull lip colors, by "changing the scattering coefficient" in a specific wavelength range, it is possible to impart vivid color and a beautiful, natural finish to dull lips. [Examples]

[0036] Examples 1-10, Comparative Examples 1-5 (stick lipstick) Stick lipsticks (solid form) with the composition shown in Table 1 were manufactured, and their vivid color development on dull lips, beautiful finish on dull lips, natural finish on dull lips, and vividness after 2 hours of application were evaluated. In addition, the reflectance of the finish on dull lips (600nm~700nm / 550nm~590nm) and the scattering coefficient of the lipstick film (600nm~700nm / 550nm~590nm) were measured. The results are also shown in Table 1.

[0037] (Manufacturing method) A total amount of 300g was prepared using a 1L container with a diameter of 130mm and a 30mm diameter disperser blade (rotation speed 2500r / min throughout the entire process). First, the base raw materials containing component (C) and other oily components (excluding the colorants containing components (A) and (B) and other powder components) were heated to 105°C and uniformly mixed for 5 minutes while maintaining the temperature. Next, the colorants containing components (A) and (B) and other powder components were added and uniformly mixed for a further 2 minutes. After degassing, the mixture was cooled and solidified to room temperature. The required amount was cut from this lipstick bulk, heated and melted to 100°C using a microwave oven, poured into a mold, and cooled and solidified to obtain a lipstick stick.

[0038] (Evaluation method) (1) Provides vibrant color to dull lips: Each stick lipstick was applied to one subject with dull lips, and 10 expert panelists visually evaluated the resulting color payoff according to the following criteria. The results are shown as the total score from the 10 expert panelists. 5; It provides very vivid color payoff on dull lips. 4; It provides vibrant color to dull lips. 3; It gives a slightly more vibrant color to dull lips. 2; The color doesn't show up very vividly on dull lips. 1; The color doesn't show up vividly on dull lips.

[0039] (2) For a beautiful finish with muted lips: Each stick lipstick was applied to one subject with dull lips, and ten expert panelists visually evaluated the beauty of the finished look according to the following criteria. The results are shown as the total score from the ten expert panelists. 5; Creates a very beautiful finish on dull lips. 4; Creates a beautiful finish on dull lips. 3; It gives a slightly more beautiful finish to dull lips. 2; The makeup doesn't look very good on dull lips. 1; Dull lips prevent a beautiful finish.

[0040] (3) For a natural finish with muted lips: Each lipstick was applied to one subject with dull lips, and ten expert panelists visually evaluated the naturalness of the finish according to the following criteria. The results are shown as the total score from the ten expert panelists. 5; Creates a very natural look on muted lips. 4; Creates a natural look with muted lips. 3; It gives a slightly natural finish to muted lips. 2; It doesn't look very natural on dull lips. 1; Dull lips don't give a natural finish.

[0041] (4) Vibrancy 2 hours after application: Each lipstick was applied to one subject with dull lips, and after two hours, ten expert panelists visually evaluated the resulting color payoff according to the following criteria. The results are shown as the total score from the ten expert panelists. 5; Provides exceptionally vibrant color that lasts for two hours on dull lips after application. 4. After application, the vibrant color lasts for 2 hours on dull lips. 3. After application, the color remains slightly more vibrant on dull lips for 2 hours. 2. After application, the lip color is dull and does not last very long. 1. After application, the lips appear dull for 2 hours, and the vibrant color does not last.

[0042] (5) Reflectance of dull lip finish: Each lipstick was applied to one subject with dull lips. The lips were used as the subject, and a white light source described in Japanese Patent Publication No. 2019-25292 was used. A hyperspectral imaging device (product name "Hyperspectral Camera NH-7", manufactured by EVA Japan) was used as the imaging device to measure the reflectance and calculate the average value for each wavelength. The results showed (1) reflectance in the 550-590 nm range, (2) reflectance in the 600-700 nm range, and (2) / (1). A larger value of (2) / (1) indicates a more vibrant finish.

[0043] (6) Scattering coefficient of lipstick film Each lipstick, in paste form, was applied to a transparent polyester film using a 25 μm thick coater. The reflectance of the coatings applied to white and black substrates was measured using a three-dimensional bending-angle spectrophotometer GCMS-4B (manufactured by Murakami Color Technology Laboratory Co., Ltd.). The measurement conditions were an incident angle of 45° and a receiving angle of 0°. The scattering coefficient was calculated using the Kubelka-Munk theory and the formula described in "Kubelka-Munk Theory and its Applications" (Color Materials, 42, 1969, pp. 472-473), and the average value for each wavelength was determined. The results showed (1) the scattering coefficient at 550-590 nm, (2) the scattering coefficient at 600-700 nm, and (2) / (1). A larger value of (2) / (1) indicates a more vibrant lipstick finish.

[0044] [Table 1]

Claims

1. The following components (A), (B), and (C): (A) Plate-shaped powder coated with Red No. 202, 0.01 to 15% by mass, (B) Component (A) excluding Red No. 202, 0.001 to 5% by mass, (C) Paste oil with a melting point of 33 to 60°C, containing 80% by mass or more of paste oil with a melting point of 33 to 55°C. A lip cosmetic containing the above, wherein the mass ratio of component (A) to component (B), (A) / (B), is 25 to 65.

2. The lip cosmetic composition according to claim 1, wherein component (C) contains 90% by mass or more of a paste oil having a melting point of 33 to 55°C.

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