JP2016183131A - Inhibitor for potential spots - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide inhibitors for potential spots.SOLUTION: An inhibitor for potential spots contains a humic soil extract as an active ingredient, the humic soil extract being suitably obtained with a water based solvent. When the humic soil extract is dissolved or suspended in water so that the solid concentration is 0.5 mass%, the inhibitor for potential spots contains preferably 0.1-100 mg/L, more preferably 1-50 mg/L, and still more preferably 5-50 mg/L of fulvic acid.SELECTED DRAWING: None

Description

  The present invention relates to a latent stain inhibitor comprising a humus soil extract. The present invention is useful in the field of skin external preparation or cosmetic composition production.

  The humus soil consists of ground plants, large and microalgae plants (in a broad sense), seafood and other minerals deposited on the bottom of the sea, swamps, ponds and lakes, or raised on the surface of the forest, or the surface of the forest Plants (broad sense) etc. and sediments containing them have been decomposed and made organic by anaerobic microorganisms etc. over a long period of time, such as those deposited on the surface. This extract of humus soil is known to contain fatty acids, organic acids, amino acids, proteins, minerals, etc. in addition to humus soil-specific constituents such as fulvic acid and humic acid. The compounding to a bath agent has been examined (patent documents 1 to 7). Humic soil extract or its component humic substance, fulvic acid or humic acid also has various functions, specifically antibacterial / sterilization, virus inactivation, type I allergy suppression effect, pore conspicuous improvement effect, convergence effect, Collagen gel contraction promoting action or singlet oxygen scavenging action has been found, and it has been studied to use it as an active ingredient in skin external preparations and cosmetic compositions (Patent Documents 8 to 15).

  On the other hand, skin develops pigmentation such as spots, freckles, dullness, senile pigment spots and liver spots due to aging and ultraviolet rays. By the time pigmentation becomes visible under sunlight, potential pigmentation that cannot be visualized (hereinafter “latent spots”) occurs. This latent stain will eventually become a visible stain, and is a stain reserve group also called a hidden stain. The latent spots can be visualized by photographing under ultraviolet light, and are used for evaluating the latent spots (Non-Patent Document 1).

JP 2000-169322 A JP 2002-187817 A JP 2004-339120 A JP 2000-136140 A Special Table 2013-53629 JP-A-61-148113 Japanese Patent Laid-Open No. 10-059837 JP 2000-136140 A JP 2006-232785 A JP 2006-273734 A JP 2008-007451 A JP 2012-162489 A JP 2012-171917 A JP2012-171921A JP 2012-171937 A

Journal of Japan Cosmetic Dermatology Vol. 6, no. 3 (2006) Page 199

  The humus soil extract, which is derived from natural products and contains various components, is expected as a functional material for beauty and health, but there are still many unclear points about its effects and mechanism of action. Moreover, the effect with respect to the latent stain of humus soil extract is not known.

  The present inventors have intensively studied humus soil extracts. And recently, the present inventors have found a latent stain suppressing action excellent in humus soil extract and completed the present invention.

The present invention provides the following.
[1] A latent stain inhibitor comprising a humus soil extract.
[2] The agent according to 1, wherein the latent stain is pigmentation visualized when photographed under ultraviolet irradiation.
[3] The agent according to 1 or 2, wherein the humus soil extract is obtained by extraction with an aqueous solvent.
[4] Any one of 1-4, wherein the humus soil extract contains 100 mg / L or more of humic substances when dissolved or suspended in water so that the solid content concentration is 0.5% by mass. Item 1. The agent according to item 1.
[5] The humus soil extract contains 0.1 to 100 mg / L of fulvic acid when dissolved or suspended in water so that the solid content concentration is 0.5% by mass. 5. The agent according to any one of 4.
[6] The agent according to any one of 1 to 5, wherein the humus soil extract is contained in a solid content of 0.0001 to 0.1% by mass.
[7] A method for suppressing latent stains, comprising applying an agent containing a humus soil extract to the epidermis.

  According to the present invention, it is possible to suppress latent spots.

FIG. 1 is a graph showing a change in the number of latent stains due to continuous use of a humus soil extract-containing lotion.

  In the present invention, the “latent stain” is melanin accumulated in the epidermis due to ultraviolet damage, and is visualized by ultraviolet irradiation. This latent stain will eventually become a stain that is visualized under sunlight, and suppressing the latent stain is very meaningful because it leads to suppression of pigmentation such as a stain. The latent spots are visualized when photographed under an ultraviolet lamp of a face image analyzer (VISIA evolution, manufactured by Canfield), and are not visualized under sunlight.

Except as otherwise noted, the numerical ranges X to Y include the values X and Y at both ends. Moreover, unless otherwise indicated,% is a value based on mass.
Hereinafter, the present invention will be described in detail.

[Humus soil extract]
The humus soil of the humus soil extract used in the present invention is not particularly limited, and any humus soil can be used regardless of the production area and state. Specifically, as this humus soil, for example, those originating from forests, rivers, lakes, oceans, etc. can be used. Plants such as microalgae (in a broad sense) and sediments containing them have been decomposed, synthesized and organically produced by anaerobic microorganisms. Of these, humus derived from marine sediments, more preferably humus derived from the Japanese archipelago, where marine sediments are raised, and humus from Kyushu is preferred. . The degree of humus of the humus soil is not particularly limited, and it is preferable that humus progresses and includes fulvic acid and humic acid which are high molecular organic compounds.

  The humus soil extract used in the present invention can be obtained by extracting and recovering effective components by bringing the humus soil into contact with a solvent by an extraction means. Furthermore, it is preferable to perform filtration means for removing unnecessary substances and sterilization. The obtained humus soil extract can be diluted, concentrated or dried as necessary, and may be separated or purified to remove impurities. The form of the humus soil extract is not particularly limited, and examples thereof include solid, semi-solid, and liquid. Specific examples include states such as solutions, suspensions, concentrates, emulsions, slurries, powders, granules, and solids. The humus soil extract refers to a composition or a component specific to humus soil, which is obtained from the humus soil by an extraction operation, unless otherwise specified. The humus soil extract can be humic, humic acid or fulvic acid.

  An example of a method for producing a suitable humus soil extract is to obtain a humus soil extract by adding an extraction solvent to the humus soil, mixing and stirring, and then separating the active ingredients.

The extraction means is not particularly limited, and examples thereof include solid-liquid extraction, liquid-liquid extraction, immersion, decoction, leaching, reflux extraction, supercritical fluid extraction, ultrasonic extraction, microwave extraction, and mixed stirring. You may combine these suitably. Moreover, it does not specifically limit as a separation means, For example, a filtration separation means, a centrifugation means, etc. are mentioned. These may be used alone or in combination. Examples of the filtration separation means include natural filtration, vacuum filtration, and pressure filtration. At this time, a filter medium such as a cellulose filter, a glass fiber filter and a membrane filter is used, and a filter aid such as celite, gravel and activated carbon is used as necessary. The pore diameter is not particularly limited, and is preferably 0.1 to 1 μm, for example. You may combine these suitably. It is preferable that the humus soil extract is filtered using a sterilizing filter because the humus soil is not thermally denatured and insoluble substances are removed.
Moreover, there is no limitation in particular in the presence or absence and the method of drying and pre-processing of humus soil performed prior to extraction.

  The extraction solvent is not particularly limited, and either a polar solvent or a nonpolar solvent may be used. Examples of the extraction solvent include water (water containing minerals such as hot spring water and deep sea water and purified water); linear, branched or cyclic alcohols; ketones such as acetone and methyl ethyl ketone; methyl acetate Esters such as ethyl acetate; Chain and cyclic ethers such as tetrahydrofuran and diethyl ether; Polyethers such as polyethylene glycol; Hydrocarbons such as squalane, hexane, cyclohexane and petroleum ether; Aromatic hydrocarbons such as toluene And halogenated hydrocarbons such as dichloromethane, chloroform and dichloroethane; and supercritical carbon dioxide. In addition, you may use these as a mixed solvent which was individual or combined 2 or more types. The organic solvent is preferably water-soluble.

  Among the extraction solvents, one or more selected from water, alcohols, ketones and supercritical carbon dioxide are preferable. Among them, one or more selected from water and alcohols are preferable, and examples thereof include water, alcohols, and a mixture of water and alcohols.

  Here, the alcohols may be either monohydric or polyhydric alcohols. Examples of monohydric alcohols include methanol, ethanol, and propanol. Examples of polyhydric alcohols include ethylene glycol, Examples include propylene glycol, 1,3-butylene glycol, 1,2-pentanediol, glycerin and dipropylene glycol. Among the alcohols, for example, lower alcohols having 1 to 5 carbon atoms such as ethanol and 1,3-butylene glycol are preferable, and among these, lower monohydric alcohols are preferable, and among these, ethanol is more preferable.

  According to the study by the present inventors, among the components contained in the humus soil extract, one of the components having a high target effect is considered to be fulvic acid. Is preferably soluble. Specifically, an aqueous solvent, that is, a solvent containing water is preferable, and water and a hydroalcoholic mixture are more preferable. More specifically, an aqueous solution containing 0 to 90% by volume of alcohol is preferable, preferably 0 to 70% by volume, more preferably 0 to 50% by volume, and still more preferably an aqueous solution containing 0 to 20% by volume. Is preferred.

  The amount of the solvent used is not particularly limited. For example, with respect to 100 kg of humus soil (dried state), it is preferably 100 to 1000 L in terms of extraction efficiency and work efficiency of the humus soil component, and 200 to 600 L. More preferably.

  The extraction period is not particularly limited, and is preferably 1 day to 3 years, more preferably 10 days to 1.5 years. The mixing and stirring of the humus soil and the extraction solvent at this time is not particularly limited, and may be performed, for example, for about 0.5 to 48 hours. Thereby, humus soil and an extraction solvent contact and it becomes easy to extract an active ingredient. Moreover, what is necessary is just to perform mixing stirring continuously or discontinuously. For example, it is preferable from the viewpoint of extraction efficiency that after mixing and stirring, further mixing and stirring for a certain period, or after mixing and stirring for a certain period, or standing and aging. It is preferable that the humus soil settles by leaving it after mixing and stirring, which is advantageous for separation. For example, mixing or stirring is performed continuously or discontinuously within the extraction period (for example, 1 day to 3 years); after mixing and stirring for 1 hour to 7 days, the mixture is allowed to stand for 1 to 60 days (preferably 20 to 40 days); For example, after mixing and stirring for 1 to 20 days (preferably 3 to 9 days), the mixture is allowed to stand for 1 to 3 years (preferably 6 to 2 years).

  The extraction temperature is not particularly limited, and is preferably low temperature to high temperature (for example, about 0 to 100 ° C.), more preferably low temperature (for example, about 0 to 9 ° C.) to normal temperature (for example, about 10 to 40 ° C.). This is preferable because the humus soil is not thermally denatured.

  Examples of drying include sun drying, natural drying, wind drying, heat drying, freeze drying, and the like, and it is preferable if the humus soil is not thermally denatured. At this time, it is desirable to dry the humus soil so that it can be finely pulverized, and the humus soil extraction efficiency is improved by pulverization, which is preferable.

  The humus soil extract contains humic soil-specific constituents (such as humic substances) such as fulvic acid and humic acid, fatty acids, organic acids, amino acids, proteins, minerals, and the like.

  The humus soil extract has a humic substance of at least 0.1 mg / L or more, preferably 10 mg / L or more when dissolved or suspended in water so that the solid content concentration is 0.5% by mass, More preferably, it is 100 mg / L or more, more preferably 100 to 1000 mg / L, still more preferably 200 to 700 mg / L, still more preferably 350 to 650 mg / L. Here, the humic substance (humic substance) refers to, for example, a high-molecular substance generated by decomposition and condensation of plant components and the like in the soil. Here, the humic substance can be quantified by a test method for humic substances according to the mineral spring test method (sanitary test method, comment 2002, Japan Pharmaceutical Association). Details of the test method are as follows.

  Take a sample VmL accurately (contain about 20 mg or more as humus), suction filter using a membrane filter with a pore size of 0.45 μm (previously dry with a desiccator (silica gel) and weigh it), and wash with a small amount of water. After that, the filtrate and the washing solution are combined, and 10 mL of HCl is added and mixed well, and the mixture is left overnight. This is filtered with a membrane filter. During filtration, the supernatant is first gently suction filtered, and finally a precipitate is added. After filtration, wash the precipitate thoroughly with water. The filtrate is usually somewhat colored. When there is much fulvic acid, coloring is remarkable. After filtration, the filter part is peeled off, wrapped in paraffin paper, and dried in a desiccator (silica gel) until it becomes a constant weight (left overnight). Subtract the weight of the membrane filter to determine the amount of humus and calculate the content in the material. Since humic substances contain ash, transfer the membrane filter to a crucible, add a small amount of methyl alcohol, burn it, and further ash to obtain the ash, which is subtracted from the previous weight.

Humic (humic) (mg / L) = ((A−B) −C) / D × 100

A: Weight of filter part (mg)
B: Weight of membrane filter (mg)
C: Weight of ash (mg)
D: Sampling amount (ml)

  According to the study by the present inventors, the target effect was sufficiently seen in the humus soil extract obtained using water as a solvent, and one of the components having a high target effect is fulvic acid among humic substances. It is believed that. Therefore, it is preferable that the humus soil extract used as an active ingredient contains a large amount of fulvic acid. Specifically, when it is dissolved or suspended in water so that the solid content concentration is 0.5% by mass. It is preferable that fulvic acid is contained in an amount of preferably 0.1 to 100 mg / L, more preferably 1 to 50 mg / L, and still more preferably 5 to 50 mg / L. Here, fulvic acid refers to an amorphous high molecular organic acid that is not precipitated by an acid among humic substances that are end products of plants and the like that are decomposed by microorganisms. Fulvic acid may have a chelating action to adsorb and release heavy metals and the like.

  In the humus soil extract, humic acid is preferably 0.2 mg / L or more, more preferably 2 mg or more, and more preferably 2 mg or more when dissolved or suspended in water so that the solid content concentration is 0.5% by mass. Preferably it is 3 mg / L or more, more preferably 4 mg / L or more. In either case, the humic acid in the humus soil extract can be preferably 30 mg / L or less, may be 20 mg or less, and may be 1.6 mg / L or less. Humic acid refers to humic substances that precipitate in the acidic region and are soluble in the alkaline region. Although the detailed chemical structure is unknown, it is a condensate of a polyhydric phenol type aromatic compound and a nitrogen-containing compound, and has a phenolic hydroxyl group and a carboxyl group.

The mixing ratio of humic acid: fulvic acid is not particularly limited, and preferably 1:10 to 10: 1. The quantification method of humic acid and fulvic acid is described in “Soil Science and Plant Nutrition, 38, 23-30 (Kuwatsuka S et al. 1992);
Plant Nutrition, 40, 601-608 (Watanabe A. et al. 1994); Humic Substances Research, 1, 18-28 (Watanabe A. et al. 2004) ”. When the quantitative value varies depending on the measurement method, it is preferable to employ a measurement method with a higher quantitative value of fulvic acid.

  The pH of the humus soil extract is preferably in the acidic region, preferably pH 1 to 6, more preferably pH 2 to 5 in terms of pharmacological activity and stability. At this time, a solid concentration of 0.1 to 1% by mass may be used, and the pH may be adjusted appropriately at 20 ° C. The pH adjuster is not particularly limited as long as it is usually used. For example, inorganic acids such as hydrochloric acid, sulfuric acid, nitric acid, carbonic acid, phosphoric acid; citric acid, acetic acid, lactic acid, succinic acid, glycolic acid, ascorbine Organic acids such as acid, malic acid, fumaric acid, tartaric acid, urea, ε-aminocaproic acid and pyrrolidone carboxylic acid; betaines such as glycine betaine and lysine betaine; metal water such as sodium hydroxide, potassium hydroxide and calcium hydroxide Inorganic alkalis such as oxides (alkali metal hydroxides and alkaline earth metal hydroxides); Organic amines such as guanidine and 2-amino-2-methylpropane; Ammonia, monoethanolamine, diethanolamine, triethanol Alkaline such as amine, isopropanolamine, diisopropanolamine Ruamin; arginine, basic amino acids such as lysine, and combinations thereof.

  Unless otherwise specified, the agent of the present invention may be a humus soil extract as an active ingredient itself, and further to a humus soil extract as an active ingredient, a diluent, a stabilizer, an antioxidant, The additive may be added as an additive for cosmetics such as preservatives or as an external preparation for skin.

  The agent of the present invention can be used as a component of cosmetics, external preparations for skin, and pharmaceutical compositions (hereinafter referred to as “cosmetics etc.”). Cosmetics and the like can contain humus soil extract as a solid content, for example, 0.00001 to 1% by mass, preferably 0.00001 to 0.1% by mass, and 0.0001 to 0.1% by mass. More preferably.

  Cosmetics containing a humus soil extract can also be prepared in the form of various dosage forms such as solid agents, semi-solid agents, and liquid agents, depending on the purpose of use. More specifically, cosmetics include cleansing, face wash, lotion, milky lotion, cream, massage products, pack products, serums / gels, lip care products, etc .; base makeup cosmetics, foundations, face powders , Makeup base, concealer, etc .; point makeup cosmetics, lipstick, lip gloss liner, teak products, eye shadow, eyeliner, mascara, eyebrow products, etc .; Etc .; As hair cosmetics or scalp cosmetics, shampoo, rinse, hair treatment, hair conditioner, hair tonic, hair restorer, scalp treatment, etc. Moreover, it can be set as a plaster, an ointment, a poultice, a liniment, a lotion, a coating agent, a patch, an aerosol (spray).

  Cosmetics containing a humus soil extract can contain various additives that are acceptable as cosmetics or pharmaceuticals, in addition to the agent of the present invention, as long as the effects of the present invention are not impaired. Examples of this are water (purified water, hot spring water, deep sea water, etc.), surfactants (emulsifiers, solubilizers, suspending agents, stabilizers, etc.), antioxidants, preservatives, gelling agents, alcohol , Film forming agents, colorants, fragrances, deodorants, salts, pH adjusters, refreshing agents, chelating agents, keratolytic agents, enzymes, vitamins, and the like. Moreover, the cosmetics containing a humus soil extract can contain various functional components that are acceptable as additives for cosmetics or skin external preparations, as long as the effects of the humus soil extract are not impaired. Examples of such ingredients are whitening agents, UV protection agents, antibacterial agents, anti-inflammatory agents, cell activators, active oxygen scavengers, moisturizers, skin cleansing ingredients, acne and acemo prevention ingredients. In particular, a combination with a whitening agent, a UV protection agent, an anti-inflammatory agent, an active agent and a moisturizing agent is preferable.

  EXAMPLES Hereinafter, although an Example demonstrates this invention, the scope of the present invention is not limited to an Example.

[Production Example 1: Production of humus soil extract]
The humus soil collected from the ground (soil near the coast of the Kyushu region) was dried and then pulverized. 5 kg of this pulverized product and 20 liters of purified water were mixed and stirred for 2 hours, further stirred at room temperature (about 10 to 30 ° C.) for 7 days, and allowed to stand for 20 days. After standing, it was filtered using a membrane filter (pore diameter 0.45 μm) to obtain an aqueous solution of humus extract (stock solution). The pH (20 ° C.) at this time was 3.0. Moreover, this dry solid content (solid content concentration) was 0.4 mass%. The total amount of humic substances contained in this stock solution is 350 mg / L (438 mg / L when converted to an aqueous solution having a dry solid content of 5 g / water of 1 L), and the contents of humic acid and fulvic acid are 4 mg / L and It was 6.7 mg / L (when converted to an aqueous solution having a dry solid content of 5 g / water of 1 L, 5 mg / L and 8.4 mg / L, respectively). This aqueous solution was used in the following examples.

Methods for the determination of humic acid and fulvic acid are described in the above-mentioned reference Soil Science and Plant Nutrition, 38, 23-30 (Kuwatsuka S et al. 1992); Soil Science and
Plant Nutrition, 40, 601-608 (Watanabe A. et al. 1994); Humic Substances Reseacrh, 1, 18-28 (Watanabe A. et al. 2004).

[Example 1: Measurement of change in latent stain by face image analysis]
1% humus soil extract aqueous solution (final concentration of humus soil extract is 0.004%). Make up lotion (see table below) and blank lotion, half face of 10 healthy men and women in their 20s and 50s Each was used twice a day for 4 weeks (July to August). Before continuous use, after 2 weeks and 4 weeks, the left face and the right face were photographed under ultraviolet irradiation using VISIA Evolution (manufactured by Canfield), and the number of latent spots was calculated by image analysis. The percentage change after 2 weeks and 4 weeks when the number before continuous use was taken as 100% was shown in%. .

  The results are shown in FIG. Since the implementation period was summer and the amount of exposure to ultraviolet rays was high, latent stains increased on the blank lotion application side 4 weeks after application, whereas on the humus soil extract-containing lotion application side, it was significant. Increase was suppressed, and the effect of suppressing latent stains was observed.

[Example 2: lotion]
(Ingredient) (mass%)
1. Dipropylene glycol 3.0
2. 1,3-butylene glycol 3.0
3. Edetic acid disodium 0.02
4). Citric acid 0.02
5. Sodium monohydrogen phosphate 0.1
6). 0.4% aqueous solution of humus soil extract of Production Example 1 5.0
7). Polyethylene glycol (molecular weight about 10,000) 0.1
8). Ethanol 20.0
9. l-Menthol 0.02
10. Polyoxyethylene (40 mol) hydrogenated castor oil 0.1
11. Perfume 0.02
12 Ascorbic acid-2-glucoside ^{* 1} 2.0
13. Ages extract ^{* 2} 0.2
14 Yokuinin extract ^{* 3} 0.2
15. Japanese evening primrose extract ^{* 4} 0.2
16. Purified water balance
* 1 Made by Hayashibara
* 2 Made by Maruzen Pharmaceutical Co., Ltd.
* 3 Made by Maruzen Pharmaceutical Co., Ltd.
* 4 Made by Ichimaru Falcos

(Production method)
A: Components (7), (12) and (16) are heated to 60 ° C. and mixed and dissolved.
B: Components (1) to (6) and A are mixed.
C: Components (8) to (11) and (13) to (15) are mixed.
D: C was added to B and mixed to obtain a skin lotion.

[Example 3: Oil-in-water base cosmetic]
(Ingredient) (mass%)
1. Cetanol 2.0
2. Stearic acid 1.0
3. Glycerol monostearate 0.5
4). Liquid paraffin 5.0
5. Paramethoxycinnamic acid-2-ethylhexyl 5.0
6. 1,1,3,5,5-pentaphenyl-1,3,5-trimethyltrisiloxane 4.0
7). Diglyceryl triisostearate 1.0
8). Hexa (hydroxystearic acid /
Stearic acid / rosinic acid) dipentaerythrityl 3.0
9. Silica 3.0
10. Ultramarine 0.2
11. Yellow iron oxide 0.2
12 Zinc oxide 1.0
13. Polyoxyethylene monooleate (20 mol)
Sorbitan 1.0
14 Carboxyl vinyl polymer 0.1
15.1,3-Butylene glycol 10.0
16. Preservative 0.2
17. Purified water residue 18. 0.4% aqueous solution of humus soil extract of Production Example 1 0.1
19. Triethanolamine 0.2
20. Chimpi extract ^{* 1} 0.5
21. Izayoi rose extract ^{* 2} 0.5
22. Hamamelis extract ^{* 3} 0.5
* 1 NOF made
* 2 Made by Maruzen Pharmaceutical Co., Ltd.
* 3 Made by Maruzen Pharmaceutical Co., Ltd.

(Production method)
A: Components (1) to (8) are heated and mixed.
B: (9) to (13) are added to A and mixed uniformly.
C: Add (19) to (14) to (18) to neutralize, then add to B and emulsify.
D: After cooling, components (20) to (22) were added to C to obtain an oil-in-water base cosmetic.

[Example 4: Cream foundation (W / O type)]
(Ingredient) (mass%)
1. Sericite 5.0
2. Titanium dioxide 10.0
3. Bengala 0.3
4). Yellow iron oxide 0.8
5. Black iron oxide 0.1
6). Zinc oxide 5.0
7). Cetyl isooctanoate 5.0
8). 2-ethylhexyl methoxycinnamate 5.0
9. Decamethylcyclopentasiloxane 10.0
10. PEG-9 methyl ether dimethicone 4.0
11. Tocopherol acetate ^{* 1} 0.1
12 Purified water remaining amount 13. 0.4% aqueous solution of humus soil extract of Production Example 1.0
14 Ethanol 10.0
15. Dipropylene glycol 3.0
16. Phenoxyethanol 0.3
17. Yukinoshita extract ^{* 2} 0.5
18. Fragrance 0.1
* 1 Eisai
* 2 Made by Ichimaru Falcos

(Production method)
A: Components (1) to (6) are uniformly dispersed. B: Components (7) to (11) are heated and mixed and maintained at 70 ° C.
C: Components (12) to (16) are heated and mixed and maintained at 70 ° C. D: A is added to C and dispersed uniformly.
E: B is added to D, mixed and uniformly emulsified.
F: After cooling, components (17) and (18) were added to E to obtain a cream foundation.

[Example 5: Cosmetic liquid]
(Ingredient) (mass%)
1. Ethanol 20.0
2. Polyoxyethylene isostearate (50 mol)
Hardened castor oil 0.2
3. Astaxanthin ^{* 1} 0.001
4). Tocopherol ^{* 2} 0.1
5. Fragrance 0.05
6.1,3-Butylene glycol 10.0
7). Dipropylene glycol 5.0
8). Acrylate / Stearless-20 Methacrylate Copolymer aqueous solution ^{* 3} 5.0
9. Sodium hydroxide 0.25
10. 0.4% aqueous solution of humus soil extract of Production Example 1.0
11. Phenoxyethanol 0.1
12 Nicotinamide ^{* 4} 5.0
13. Purified water balance
* 1 Sigma
* 2 Sigma
* 3 Acrine 22 (Rohm & Haas): 30% polymer
* 4 Sigma

(Manufacturing method)
A: Components (1) to (5) are mixed uniformly.
B: Components (6) to (13) are mixed uniformly.
C: A was added to B and mixed uniformly to obtain a cosmetic liquid.

[Example 6: Lotion agent]
(Ingredient) (mass%)
1. Polyoxyethylene (20 mol) sorbitan monolaurate 1.2
2. Ethanol 8.0
3. Methyl paraoxybenzoate 0.2
4). Glycerin 5.0
5.1,3-Butylene glycol 6.5
6). 0.4% aqueous solution of humus soil extract of Production Example 1 20.0
7). Allantoin ^{* 1} 0.2
8). Salicylic acid ^{* 2} 0.5
9. Purified water balance
* 1 Made by Merck
* 2 Wako Pure Chemical Industries

(Production method)
A: Components (1) to (3) are mixed and dissolved.
B: Components (4) to (9) are mixed and dissolved.
C: A and B were mixed to make a lotion agent.

  All of the prepared lotions, oil-in-water base cosmetics, cream foundations (W / O type), beauty liquids, and lotions are stable and can be applied to the skin. is there. These are useful for suppressing latent stains on the skin.

Claims (7)

A latent stain inhibitor made of humus soil extract. The agent according to claim 1, wherein the latent stain is pigmentation visualized when photographed under ultraviolet irradiation. The agent according to claim 1 or 2, wherein the humus soil extract is obtained by extraction with an aqueous solvent. The humus soil extract contains 100 mg / L or more of humic substances when dissolved or suspended in water so that the solid content concentration is 0.5% by mass. The agent according to item. The humus soil extract contains 0.1 to 100 mg / L of fulvic acid when dissolved or suspended in water so that the solid content concentration is 0.5% by mass. The agent according to any one of the above. The agent according to any one of claims 1 to 5, wherein the humus soil extract is contained in a solid content of 0.0001 to 0.1 mass%. A method for suppressing latent stains, comprising applying an agent containing a humus soil extract to the epidermis.