JPH0881333A - Method for adjusting skin color - Google Patents

Abstract

PURPOSE: To provide a method for adjusting skin color capable of making dark colored parts in the skin caused by a nevus, a hemangioma, a ruddy face, spots, freckles, etc., inconspicuous. CONSTITUTION: This method for adjusting skin color comprises using a material having a coherent light and applying the material of which wave-length of the transmitted coherent light is adjusted so as to provide a complementary transmitted interference color to the dark colored parts of the skin, on the skin to make the dark colored parts inconspicuous. As the material having the coherent light, a titanium dioxide covered mica, a ferric oxide covered mica, etc., are cited and by adjusting the thickness of the covering membrane the wave-length of the transmitted coherent light can be adjusted at will. In the case of the dark colored parts having a reddish color, the material adjusted to have the transmitted coherent light having a maximum reflection peak at 400-550nm (blue to greenish), and in the case of the dark colored parts having a blueish color, the material adjusted to have the transmitted coherent light having a minimum reflection peak at 400-550nm (yellow to reddish) are used. Since this method takes the advantage of filtering effects, it can make the dark colored part inconspicuous in a natural way without damaging the transparent feeling of the skin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin color adjusting method, and more particularly to a skin color adjusting method for making dark-colored parts of skin caused by nevus, hemangiomas, reddish faces, spots, freckles and the like inconspicuous.

[0002]

2. Description of the Related Art Conventional cosmetics, such as makeup cosmetics, contain white pigments such as talc, titanium oxide, mica, kaolin, zinc oxide and magnesium carbonate as a cosmetic base. White powder, solid white powder, emulsion-type foundation, water-dispersion type foundation, oil-dispersion type foundation, lipstick, by appropriately mixing coloring pigments such as iron oxide, carbon black and lake pigments, and dyes, oils and fats, emulsifiers, and fragrances. And other cosmetics. However, it is difficult for these cosmetics obtained by blending as described above to naturally cover skin troubles (spots, freckles, nevus, hemangiomas, etc.). That is,
Conventional cosmetics for covering skin troubles cover the skin having these skin troubles with a base having a great shade power such as titanium dioxide and zinc white to hide dark-colored portions of the skin, and In order to control the flesh color to a desired color, a method using a cosmetic containing a pigment has been mainly used. In addition, recently, JP-A-2-30401
As described in Japanese Patent Publication No. 5, there is a report on a makeup cosmetic for skin troubles using a highly hiding powder such as aluminum. Market demand for a cosmetic covering a dark-colored part of the skin. The reality is that However, in such a method, for a dark color such as nevus of Ota or hemangiomas, and a wide range of dark color parts of the skin, a base with high hiding property is used, thick coating is applied, or a pigment is applied. As a result of using a large amount of cosmetics, there is a drawback that a natural and transparent skin color cannot be produced. The present invention has been made in view of such conventional circumstances, and does not utilize the shadowing force of the base for the dark-colored portion of the skin, but a substance having interference has a filtering effect on light of a specific wavelength. It is intended to provide a skin color adjusting method for adjusting a dark color portion of skin by utilizing this filter effect.

[0003]

That is, the present invention is characterized in that a dark-colored portion of skin is made inconspicuous by using a substance having interference light and arbitrarily adjusting the wavelength of the transmitted interference light. This is a skin color adjustment method. Also, specifically,
The dark-colored portion of the skin is made inconspicuous by covering the skin with a substance in which the wavelength of the transmitted interference light is adjusted so as to be a complementary interference color to the dark-colored portion of the skin.

The substance used in the method of the present invention, which has a color complementary to the dark color portion of the skin as a transmission interference color (hereinafter referred to as an interfering substance), makes the dark color portion of the skin inconspicuous. Therefore, a colorless or colored thin transparent substance or a substance obtained by coating the carrier as a thin film on a carrier is generally used by adjusting its color tone, thickness or thin film thickness to a predetermined value.

The mechanism of action of this interfering substance to make the dark-colored part of the skin inconspicuous will be described with reference to the drawings. First, considering the reflected interference light when the substance (thin film) having the transmitted interference light is irradiated with the monochromatic light, as shown in FIG.
Is incident, a part of the monochromatic light incident on the thin film 1 is reflected from the first surface 1a to become 3a, and the remaining light enters through the thin film 1 and is reflected from the second surface 1b. It becomes 3b. Then, the light 3a reflected from the first surface 1a and the light 3b reflected from the second surface 1b enter the eye at the same time. But here it is necessary to take into account that a phase change occurs at the interface between two different media. That is, when the light traveling through the medium 5 having the refractive index n is reflected and refracted at the boundary surface with the medium (thin film 1) having the refractive index n ′, the light is incident when n> n ′. The ray and the reflected ray have the same phase at the point of incidence, n
In the case of <n ', a phase difference of π occurs between the incident ray and the reflected ray. If it is expressed as a wavelength shift, it is a half wavelength shift.

Therefore, when a light beam incident from an optically dense medium to an optically sparse medium is reflected at its boundary surface, the waveform is reflected as it is in a folded form, but from the optically sparse medium to an optically sparse medium. If it goes to a dense medium and is reflected at its interface, it will be reflected with a loss of half a wavelength at the point of incidence. But in the case of refraction, n
Even if> n ′ or n <n ′, no phase change occurs in the refracted light beam. Therefore, in the actual case, the thin film 1
Where their thicknesses are integer multiples of the wavelength of the light used, their effects cancel each other out, thus darkening
Where their thickness is half a wavelength of light, or an odd multiple of it, their effects intensify and thus appear bright.

Considering the transmitted interference light, as shown in FIG. 1B, the monochromatic light 2 is transmitted to the thin film 1 of the transparent object.
Is incident, a part of the monochromatic light incident from the first surface 1a of the thin film 1 passes through the thin film 1, is emitted from the second surface 1b and becomes 4a, and the remaining light is reflected by the second surface 1b. Then, after being further reflected by the first surface 1a, it is emitted from the second surface 1b and becomes 4b. Then, the transmitted interference light 4 appears brighter because its action is strengthened when the thickness of the thin film 1 is an integral multiple of the wavelength of the light used, and the thickness of the thin film 1 is half the wavelength of the light, or At the odd multiple, the effects disappear and appear dark.

The above has described the relationship between the thickness of the thin film used and the light intensity in the case where the thin film is irradiated with monochromatic light. However, when white light is applied to a thin film having a certain specific thickness, The intensified wavelength light changes depending on the thickness of the thin film. Then, when a certain wavelength light with a predetermined thin film thickness strengthens its action in the reflected interference light and appears bright, the action in the transmitted interference light weakens due to the same principle as described above. And as a result,
A transmission interference color having a complementary color relationship with the wavelength light of the reflection interference light can be obtained. Such a substance having interference has a filter effect for light of a specific wavelength, and can be used as a filter for light of any wavelength by controlling the thickness of the thin film.

On the other hand, the dark-colored portion of the skin is recognized as a result of white light being incident on the skin and scattering and reflecting the wavelength light corresponding to the dark-colored portion. Therefore, in order to make the dark-colored portion of the skin inconspicuous, it is necessary to allow the light in which the wavelength light corresponding to the dark-colored portion of the skin is removed from the white light based on the above-mentioned principle to enter the skin. Good. Assuming that the dark part of the skin is bluish, 400 that corresponds to blue
By covering the skin with a substance that does not include or contains a small amount of transmitted interference light with a wavelength of around 550 nm, the bluish color development from inside the skin is naturally suppressed and the dark-colored part of the skin is made inconspicuous. You can The wavelength of the transmitted interference light can be controlled arbitrarily by adjusting the thin film thickness as described above. As for the surface interference light (reflection interference light), wavelength light having a complementary color relationship with the transmission interference color is emphasized based on the above-mentioned principle. Therefore, if the dark-colored part of the skin is bluish, it becomes a blue surface interference color, but the interference color is directional with respect to the incident angle of light and strongly appears in the vicinity of specular reflection, and in other directions. Since it is hardly observable, the color can be corrected by separately coating the foundation or by blending the coloring agent with the substance having the interference light.

In the method of the present invention, examples of the interfering substance include titanium dioxide-coated mica, zirconium oxide-coated mica, alumina-coated mica, iron oxide-coated mica, plate titanium oxide, plate iron oxide, plate alumina, Examples include silica-coated mica, tabular silica, interfering resin powder, low-order titanium oxide-coated mica, fish phosphorus foil, and those coated with colored organic / inorganic colorants. It is also possible to use those coated or compounded with the organic substances, metal oxides, metals, clay minerals and the like.

Further, according to the present invention, by coating a substance having a maximum reflection peak (blue to greenish) having a transmission interference light wavelength of 400 to 550 nm on the skin, the reddish dark portion of the skin is covered. There is provided a skin color adjustment method that makes the color inconspicuous.
This method is particularly useful for making dark red areas of skin such as hemangiomas inconspicuous. Wavelength 400-550
A substance having a transmission interference light of nm at the maximum reflection peak (blue to green) has an optical film thickness of 190 to 270 nm or 405 to 50 nm on mica when titanium is used as a material.
The one coated with 0 nm of titanium dioxide is applicable.

The substances used in the flesh color adjusting method of the present invention for making the dark reddish portion inconspicuous are represented by physical indexes as follows. That is, it is a substance having a hiding power of 100 or less as determined by the measurement method A below and a red covering power of 8 or more as determined by the measurement method B below.

A: A substance for adjusting skin color was mixed with a nitrified cotton vehicle at a concentration of 80% by weight, and then applied to a hiding power test paper having white and black bases so as to have a thickness of 30 μm. Color difference ΔE of colorimetric values on black background
Is calculated by the following formula (1).

[0014]

[Equation 5] Concealment power = (1 ÷ ΔE) × 100 (1)

B: A substance for adjusting skin color was mixed with a nitrified cotton vehicle at a concentration of 80% by weight, and then coated on a red transparent PET film so as to have a thickness of 30 μm, and an incident light angle was 45.
Color measurement is carried out at an angle of −15 ° and a light receiving angle of −15 °, and is calculated by the following formula (2).

[0016]

## EQU00006 ## Red covering power = {(V-W) / V} .times.100 (2)

(In the formula, V represents the integral value of the reflectance at 600 to 730 nm of the red transparent PET film not coated with the skin color adjusting substance, and W is the red transparent PET film coated with the skin color adjusting substance. 600 ~ 730nm
The integrated value of the reflectance in is shown. ) Here, the red covering power is more preferably 10 or more.

Further, according to the present invention, a substance having a minimum reflection peak (yellow to red) having a wavelength of transmitted interference light of 400 to 550 nm is coated on the skin, whereby a bluish dark portion of the skin is covered. There is provided a skin color adjustment method that makes the color inconspicuous. This method is particularly useful for making the dark blue parts of the skin such as nevus of Ota inconspicuous. Wavelength 400 ~
Minimum reflected peak of transmitted interference light of 550 nm (yellow to red)
In the case of using mica titanium as a material,
Optical thickness of 290-380nm or 530 on mica
Those coated with titanium dioxide of ˜660 nm are applicable.

The substances used in the flesh color adjusting method of the present invention for making the dark blue-colored portion inconspicuous are represented by physical indexes as follows. That is, it is a substance having a hiding power of 100 or less as determined by the measurement method of A below and a blue covering power of 40 or more as determined by the measurement method of C below.

A: A substance for adjusting skin color was mixed with a nitrified cotton vehicle at a concentration of 80% by weight and then applied to a hiding power test paper having white and black bases so as to have a thickness of 30 μm. Color difference ΔE of colorimetric values on black background
Is calculated by the following formula (1).

[0021]

[Equation 7] Concealment power = (1 ÷ ΔE) × 100 (1)

C: A substance for skin color adjustment was mixed with a nitrified cotton vehicle at a concentration of 80% by weight, and then coated on a blue transparent PET film so as to have a thickness of 30 μm, and an incident light angle was 45.
The color is measured at an angle of -15 ° and a light receiving angle of -15 °, and is calculated by the following formula (3).

[0023]

## EQU00008 ## Blue covering power = {(X−Y) / X} × 100 (3)

(In the formula, X represents the integrated value of the reflectance at 400 to 550 nm of the blue transparent PET film not coated with the skin color adjusting substance, and Y is the blue transparent PET film coated with the skin color adjusting substance. 400-550nm
The integrated value of the reflectance in is shown. ) Here, the blue covering power is preferably 45 or more.

The flesh color adjusting method of the present invention uses the above-mentioned interfering substance, and the method of the present invention is carried out mainly by blending it in a makeup cosmetic composition, and especially in a base makeup composition. You can When used in make-up cosmetics, it may consist of only an interfering substance depending on its type and application. In addition to the interfering substance, one or more of various powders, oil agents and water may be blended. It can also be set. The amount of the interfering substance blended is appropriately 10% by weight or more based on the total amount of powder.

Powder components that can be blended in addition to the interfering substance include talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, phlogopite, biotite, and lithia mica. , Permiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, silica, alumina, zeolite, barium sulfate, calcined calcium sulfate (baked Gypsum), calcium phosphate,
Fluorapatite, hydroxyapatite, ceramic powder, metallic soap (zinc myristate, calcium palmitate, aluminum stearate), inorganic powder such as boron nitride, polyamide resin powder (nylon powder), polyethylene powder, polymethylmethacrylate powder, polystyrene Powder, copolymer resin powder of styrene and acrylic acid, benzoguanamine resin powder, polytetrafluoroethylene powder, organic powder such as cellulose powder, titanium dioxide, inorganic white pigment such as zinc oxide, iron oxide (red iron oxide), titanic acid Inorganic red pigments such as iron, inorganic brown pigments such as γ-iron oxide, inorganic yellow pigments such as yellow iron oxide and loess, inorganic black pigments such as black iron oxide, carbon black and low order titanium oxide,
Inorganic purple pigments such as mango violet and cobalt violet, inorganic green pigments such as chromium oxide, chromium hydroxide and cobalt titanate, inorganic blue pigments such as ultramarine blue and navy blue, titanium oxide coated talc, colored titanium oxide coated mica, Pearl pigment such as bismuth oxychloride, metal powder pigment such as aluminum powder and copper powder, red 201, red 202, red 204, red 205, red 220, red 226, red 228
No., Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401, Blue No. 404 and other organic pigments, Red No. 3, Red No. 104, Red No. 106, Red No. 22
No. 7, red 230, red 401, red 505, orange 205, yellow 4, yellow 5, yellow 202, yellow 203, green 3, blue 1 zirconium, barium or aluminum lake And organic pigments such as chlorophyll and natural pigments such as β-carotene. These may use 1 type and may use 2 or more types.
However, the powder is not limited to the above components as long as it is a powder applicable to general cosmetics.

The oil agent may be any raw material oil agent applicable to cosmetics, and examples thereof include liquid paraffin, squalane, petrolatum, polyisobutylene, microcrystalline wax, isopropyl myristate, myristyl octyldodecanol, and di- (2-ethylhexyl). Succinate, neopentyl glycol diisooctanoate,
Glycerin monostearate, triglyceride isostearate, coconut oil fatty acid triglyceride, castor oil, ethanol, octyldodecanol, hexadecyl alcohol, cetyl alcohol, oleyl alcohol,
Stearyl alcohol, polyethylene glycol, lauric acid, palmitic acid, oleic acid, stearic acid, isostearic acid, lanolin, beeswax, hydrocarbons such as olive oil, ester, glyceride, lower alcohol, higher alcohol, polyhydric alcohol, higher fatty acid or organo Examples thereof include polysiloxane fluid.

Among the cosmetics used in the method of the present invention,
If necessary, a surfactant, a moisturizer, a thickener, a sequestering agent, a UV absorber, an antiseptic, an antioxidant, a fragrance, various agents commonly used in cosmetics may be added. Good.

[0029]

EXAMPLES Next, the skin color adjusting method of the present invention will be explained with reference to examples, but the present invention is not limited to these. All compounding ratios are% by weight.

Examples 1 and 2 and Comparative Examples 1 to 3 Oily compact foundations for blue-based dark color part correction having the compositions shown in Table 1 were produced by the following methods, and the blue covering power and hiding power were measured by the methods described below. did. The results are also shown in Table 1.

(Production method) (3) to (6) are heated and dissolved, and then (7) to (1
Add 4) and disperse the dispersion. This product is treated with a special machine TK mill and heated to 85 ° C. (1), (2) and (15) which had been heated and melted and mixed at 90 ° C. in advance were added to this and degassing was performed. It was filled in a predetermined medium plate and allowed to cool to obtain an oily compact foundation for correcting a bluish dark color portion.

[0032]

[Table 1] ─────────────────────────────────── Examples Examples Comparative examples Combination recipes ───── ────────── 1 2 1 2 3 ──────────────────────────────────── (1) Carnauba wax 1.0 1.0 1.0 1.0 1.0 (2) Microcrystalline wax 5.0 5.0 5.0 5.0 5.0 (3) Decamethylcyclopentasiloxane 8.5 8.5 8.5 8.5 8.5 (4) Squalane 21.0 21.0 21.0 21.0 21.0 (5) Cetyl 2-ethyl Hexanoate 15.0 15.0 15.0 15.0 15.0 (6) Sorbitane dioleate 1.5 1.5 1.5 1.5 1.5 (7) Mica titanium (blue interference color system) ^{* 1} − 20.0 − − − (8) Mica titanium (red interference color system) ^{* 2} − − − − 20.0 (9) Fe ₂ O ₃ coated mica ^{* 3} 20.0 − − − − (10) Titanium dioxide 10.0 10.0 30.0 − 10.0 (11) Aluminum powder − − − 30.0 − (12) Iron oxide pigment 3.0 3.0 3.0 3.0 3.0 (13) Mica 11.0 11.0 11.0 11.0 11.0 (14) Spherical nylon 4.0 4.0 4.0 4.0 4.0 (15) Perfume proper amount proper amount proper amount proper amount appropriate amount ──────────────────── ──────────────── Blue cover power 50 60 32 69 8.6 Concealment power 12 7 484 2852 13 ─────────────────── ────────────────

* 1: TiO ₂ coated mica (Flamenco blue manufactured by Marl, TiO ₂ / mica = 43 to 49/51
57, TiO ₂ optical film thickness of about 310 nm, yellow to red transmitted light) * 2: TiO ₂ coated mica (Flamenco red manufactured by Marl Co., TiO ₂ / mica = 37 to 43/57 to 63, Ti
Optical thickness of O ₂ is about 250 nm, blue to green transmitted light) * 3: Fe ₂ O ₃ 34.0% coated mica (yellow to red transmitted light)

Next, the oil-based compact foundation for correcting the blue-based dark color portion thus obtained was evaluated for cover effect, transparency and natural finish. The evaluation method was carried out on 10 holders of the dark-colored part of the severe blue bruise (eg, Ota nevus), and the visual judgment was performed by a third party, and from 5 (present or natural) to 1 (not or Five-level evaluation up to (unnatural) was performed, and the average value of each evaluation value was obtained. In addition, skin color measurement (normal area and dark area) is Minolta CM-100
The color difference was measured and the average value was calculated. The results are shown in Table 2.

[0035]

[Table 2] ─────────────────────────────────── Examples Comparative examples ─────── ───────── 1 2 1 2 3 ──────────────────────────────────── Cover Effect (skin color correction effect) 4.3 4.5 4.5 4.8 2.2 ─────────────────────────────────── Transparency 3.2 3.9 1.9 2.5 3.5 ─────────────────────────────────── Natural finish 3.9 4.1 2.5 1.2 2.5 ─── ──────────────────────────────── Color difference between normal skin and dark skin (△ E) 18.1 18.1 18.1 18.1 18.1 ─────────────────────────────────── Color difference between normal skin and dark areas after application (△ ) 2.6 1.2 3.8 6.4 7.0 ───────────────────────────────────

As is clear from Table 2, the foundations of Examples 1 and 2 in which powders having transmitted light of yellow to red were blended by the method of the present invention were used to cover the dark blue part of Ota nevus (skin color). Despite its excellent correction effect, it was transparent and had a natural finish. Especially yellow ~
Example 2 using titanium mica having red transmitted interference light had an unprecedented excellent finishing feeling. Further, when these commercially available powdery foundations were applied after applying these correction foundations, the gloss of the mica titanium changed to a natural transparent feeling, and the finish was comparable to that of normal parts. On the other hand, Comparative Example 1 containing a large amount of conventional titanium dioxide had a covering effect, but had a powdery finish without transparency. Further, Comparative Example 2 containing aluminum powder showed excellent concealing property, but the finish had an unnatural glaring feeling, the finish was unnatural, and the feeling of use was unsatisfactory. What is more interesting is that Comparative Example 3, which uses titanium mica having a reflection interference light of yellow to red which has a complementary color relationship with Example 2, has a transparent feeling, but almost no cover effect is observed, and the correction foundation is used. Was not preferable.

Examples 3 and 4 and Comparative Examples 4 to 6 Oil-based stick foundations for reddish dark color part correction having the compositions shown in Table 3 were produced by the following methods, and the red covering power and hiding power were measured by the methods described below. did. The results are also shown in Table 3.

(Production method) (3) to (6) are heated and dissolved, and then (7) to (1
Add 4) and disperse the dispersion. This product is treated with a special machine TK mill and heated to 85 ° C. (1), (2) and (15) which have been heated and melted and mixed at 95 ° C. in advance are added thereto, and degassing is performed. Fill the prescribed stick container,
It was left to cool to obtain an oil-based stick foundation for red-based dark color part correction.

[0039]

[Table 3] ─────────────────────────────────── Examples Examples Comparative examples Formulation ───── ──────────── 3 4 4 5 6 ────────────────────────────────── ── (1) Carnauba wax 1.0 1.0 1.0 1.0 1.0 (2) Solid paraffin wax 6.0 6.0 6.0 6.0 6.0 (3) Dimethyl silicone 7.5 7.5 7.5 7.5 7.5 (4) Liquid paraffin 15.0 15.0 15.0 15.0 15.0 (5) Glyceryl monoiso Stearate 20.5 20.5 20.5 20.5 20.5 (6) Sorbitan diisostearate 2.0 2.0 2.0 2.0 2.0 (7) Hydrophobized titanium mica ^{* 4} − 12.0 − − − (red interference color system) (8) Hydrophobized titanium mica ^{* 5} − − − − 12.0 (blue interference color system) (9) Fe ₂ O ₃ coated mica ^{* 6} 12.0 − − − − (10) Titanium dioxide 8.0 8.0 30.0 − 8.0 (11) Aluminum powder − − − 30.0 − (12 ) Iron oxide face 2.0 2.0 2.0 2.0 2.0 (13) Sericite 17.0 17.0 7.0 7.0 17.0 (14) Spherical PMMA powder 9.0 9.0 9.0 9.0 9.0 (15) Perfume proper amount proper amount proper amount proper amount ─────────────── ──────────────────── Red cover power 10 12 5.3 17.8 2 Concealment power 15 7 411 3060 8 ─────────────── ────────────────────

* 4: Red iron oxide treated TiO ₂ coated mica (Duochrom YR manufactured by Marl Co., Fe ₂ O ₃ / TiO ₂ / mica = 3-5 / 36-42 / 56-61, optical film of TiO ₂ Approximately 250 nm thick, blue to green transmitted light) * 5: Red iron oxide-treated TiO ₂ coated mica (Duochrom YB manufactured by Marl Co., Fe ₂ O ₃ / TiO ₂ / mica = 1 to 2 /
44-49 / 48-54, TiO ₂ optical film thickness about 31
0 nm, yellow to red transmitted light) * 6: Fe ₂ O ₃ 48.0% coated mica (blue to green transmitted light)

Next, the covering effect, transparency and naturalness of finish of the obtained oil-based stick foundation for red-based dark color portion correction were evaluated. The evaluation method was carried out by 10 persons with dark-colored part holders of severe red bruise (hemangiomas, etc.), and a visual judgment was performed by a third party, and from 5 (present or natural) to 1 (absent or not). 5 grades up to (natural) were obtained, and the average value of each evaluation value was obtained. Further, the skin color measurement (normal area and dark color area) was subjected to color difference measurement by the method described above, and an average value was calculated. The results are shown in Table 4.

[0042]

[Table 4] ─────────────────────────────────── Examples Comparative examples ─────── ───────── 3 4 4 5 6 ──────────────────────────────────── Cover Effect (skin color correction effect) 4.1 4.3 4.2 4.2 2.9 ─────────────────────────────────── Transparency 3.2 3.8 1.0 2.5 3.5 ─────────────────────────────────── Natural finish 3.7 4.1 2.3 1.9 2.1 ─── ──────────────────────────────── Color difference between normal skin and dark skin (△ E) 16.5 16.5 16.5 16.5 16.5 ─────────────────────────────────── Color difference between normal skin and dark areas after application (△ ) 2.2 1.6 5.8 4.3 8.2 ───────────────────────────────────

As is clear from Table 4, the foundations of Examples 3 and 4 in which the powder having blue to green transmitted light was blended by the method of the present invention, had a covering effect on the red deep color portion of hemangiomas (skin color correction). Despite its excellent effect, it was transparent and had a natural finish. In particular, Example 4 using titanium mica having blue to green transmitted interference light had an unprecedented excellent finishing feeling. Furthermore, after applying these correction foundations and then applying a commercially available emulsified foundation, the gloss of titanium mica can be imparted as a natural transparency. On the other hand, Comparative Example 4 containing a large amount of conventional titanium dioxide had a covering effect but had a powdery finish with no transparency. Also,
Comparative Example 5 containing aluminum powder showed excellent concealing properties, but had an unnatural glaring finish, an unnatural finish, and a rough feel to the touch.
What is more interesting is that Comparative Example 6, which uses titanium mica having a reflection interference light of blue to green which has a complementary color relationship with that of Example 4, has a transparent effect, but almost no cover effect is observed. Was not preferable.

[Effect test of hiding power, blue covering power and red covering power] Hiding power effect test method (Sample) Blue-based skin color adjusting composition (S-1) produced in Example 2, Example 4 In the red-based composition for skin color adjustment (S-2), which is a commercially available product, a partial foundation for a dark-colored skin partial cover (Shiseido Co., Ltd., Spots Cover, R-1) and a commercial product. Three items of base foundation for a part (R-2, manufactured by C) were used as samples. (Method) Each of the above samples was uniformly mixed with a nitrified cotton vehicle at a concentration of 80 wt% using a small stirrer, and this was applied to a hiding power test paper having a white and black base by an applicator.
It was applied to a thickness of 0 μm. Next, the color tone of the sample applied to the white and black bases was measured using Minolta CM1000, and the obtained color difference Δ of the sample applied to the white and black bases.
E was obtained, and the hiding power was obtained by the equation (1) using this color difference.

[0045]

[Equation 9] Concealment power = (1 ÷ ΔE) × 100 (1)

The hiding power 1000 has a color difference of 0.1, which is a level for completely hiding the black and white background together, and a hiding power of 100.
Has a color difference of 1.0, there is almost no difference in color tone on a black and white background, and hiding power 10 has a color difference of 10.0.
The black and white background is clearly discernible.

Blue-based covering power effect test method (Sample) S-1, R-1 and R-2 in the hiding power effect test were used. (Method) Each sample was coated on a blue transparent PET film by the same method as the hiding power effect test, and this was applied with a Murakami Color Science Laboratory's GCMS3 incident angle-45 °, light-receiving angle- Color measurement was performed under the condition of 15 °. Wavelength of blue transparent PET film measured as control 400-550 nm
Integrated value of reflectance in the air and blue PE coated with sample
The difference ratio with the integral value of the reflectance of the T film at a wavelength of 400 to 550 nm was obtained by the equation (3) and used as the blue covering power.

[0048]

## EQU10 ## Blue covering power = {(X−Y) / X} × 100 (3)

(In the formula, X represents the integrated value of reflectance at 400 to 550 nm of the blue transparent PET film not coated with the skin color adjusting composition, and Y represents the blue transparent PET film coated with the skin color adjusting composition. 400-550nm
The integrated value of the reflectance in is shown. )

Red-based covering power effect test method (Sample) S-2, R-1 and R-2 in the hiding power effect test were used. (Method) Each sample was applied to a red transparent PET film in the same manner as in the case of measuring the blue-based cover effect, and this was applied with an angle-of-incidence measuring device GCMS3 manufactured by Murakami Color Science Laboratory at an incident angle of 45 °, Color measurement was carried out under the condition that the acceptance angle was -15 °. Wavelength 600 of red transparent PET film measured as a control
The difference ratio between the integral value of reflectance at ˜780 nm and the integral value of reflectance at the wavelength of 600 to 780 nm of the red PET film coated with the sample is obtained by the equation (2),
The cover power was red.

[0051]

[Equation 11] Red covering power = {(V−W) / V} × 100 (2)

(In the formula, V represents the integral value of the reflectance at 600 to 730 nm of the red transparent PET film not coated with the skin color adjusting composition, and W is the red transparent PET film coated with the skin color adjusting composition. 600 ~ 730nm
The integrated value of the reflectance in is shown. )

Results FIG. 2 shows the results of the hiding power and blue covering power of S-1 which is a bluish skin color adjusting composition used in the method of the present invention and R-1 and R-2 which are conventional products. FIG. 3 shows S-2 which is a reddish skin color adjusting composition used in the method of the present invention.
FIG. 3 is a diagram showing the results of hiding power and red covering power of R-1 and R-2 which are conventional products. First, in comparison with S-1 and S-2, the conventional partial foundation foundation R
It can be seen that -1 and R-2 have extremely high hiding power. As described above, the conventional products are all color-corrected by hiding the dark-colored part of the skin. On the other hand, S-1 and S-2 have a concealing power of several tenths to several hundredths of that of the conventional products. However, FIG. 2 shows that the blue covering power of S-1 having almost no hiding power is higher than that of the conventional products R-1 and R-2. Further, in FIG. 3, the red covering power S-2, which has almost no hiding power, is the conventional products R-1 and R-2.
Is higher than that. As described above, it can be seen that the skin color adjusting composition used in the method of the present invention has extremely high blue and red covering power in spite of low hiding power.

Example 5 Water-in-oil emulsified foundation for blue dark color part correction (formulation) (1) Decamethylcyclopentasiloxane 27.0 wt% (2) Dimethylpolysiloxane 3.0 (3) Polyoxyalkylene Modified organopolysiloxane 2.0 (4) Dextrin fatty acid ester treatment Mica titanium (blue interference color system) 18.0 (Merck Temilon Blue MP-155, yellow to red system transmitted light) (5) Dextrin fatty acid ester treatment titanium dioxide 4.0 (6) Dextrin fatty acid ester treatment Iron oxide pigment 2.0 (7) Paraben 0.2 (8) 1,3-butylene glycol 4.0 (9) Deionized water balance

(Production method) After stirring and mixing (1) to (3), (4)
~ (6) is added and dispersed. Among them, (9) to (7) and
By emulsifying by adding the water phase part in which (8) is dissolved,
A water-in-oil type emulsion foundation for blue dark color part correction having a hiding power of 10 and a blue covering power of 55 was obtained.

(Effect) When this foundation was applied to a panel having a blue dark portion of Ota nevus, the dark portion was effectively corrected and excellent concealment was achieved despite the transparent finish. Showed the effect. When a commercially available solid white powder was applied on both the normal part and the dark-colored part to which this foundation was applied, the gloss due to the correction foundation of the dark-colored part was suppressed, and there was almost no difference between the two parts, and there was no natural difference. It was a feeling of finish.

Example 6 Stick-shaped water-in-oil type emulsion foundation for red dark color correction (formulation) (1) Decamethylcyclopentasiloxane 38.0 wt% (2) Polyethylene wax 10.0 (3) Carnauba wax 1 .0 (4) Polyoxyalkylene-modified organopolysiloxane 0.5 (5) Sorbitan sesquiisostearate 1.5 (6) Silicone-treated mica titanium (red interference color system) 5.0 (Chimikai redescent red manufactured by Marl) , Blue to green transmitted light) (7) Silicone treated talc 2.0 (8) Silicone treated sericite 10.0 (9) Silicone treated titanium dioxide 9.0 (10) Silicone treated red iron oxide 1.0 (11 ) Silicone-treated yellow iron oxide 2.0 (12) Spherical nylon powder 5.0 (13) Paraben 0.1 (14) Perfume proper amount (15) 1,3-Butylene glycol 4.0 (16) Deionized water balance

(Manufacturing method) (1) to (5) and (14) are heated to 90 ° C to dissolve, then (6) to (12) are added and dispersed at 90 ° C with a homogenizer. Preheated to 95 ° C
The mixture of (13), (15) and (16) is added and emulsified. Then, it was filled in a predetermined stick container and cooled to room temperature to obtain a stick-like water-in-oil type emulsified foundation for red dark color portion correction with a target hiding power of 9 and a red covering power of 11.

(Effect) This stick-like water-in-oil type emulsion foundation effectively covers a dark red portion with a transparent natural finish to a heavy reddish dark portion such as hemangiomas. Not only that, it was also effective in correcting mild reddish dark areas such as acne scars and reddish faces.

Example 7 Powdery Foundation for Correcting Mild Red Dark Color Part (Compounding Formulation) (1) Talc 20.0% by Weight (2) Sericite 38.8 (3) Mica Titanium (Red Interference Color System) 9. 0 (Maru Duochrome YR, blue-green transmitted light) (4) Titanium dioxide 11.0 (5) Spherical polystyrene 5.0 (6) Red iron oxide 0.6 (7) Yellow iron oxide 1.8 (8) Black iron oxide 0.1 (9) Herringdon pink 0.2 (10) Paraben 0.5 (11) Liquid paraffin 5.0 (12) Dimethyl silicone 5.0 (13) Sorbitan monoisostearate 2 .0 (14) Ceresin 1.0

(Production method) A mixture of (1) to (9) with stirring,
(10) to (14) which have been heated and dissolved are added and mixed and dispersed. This was pulverized with a pulsarizer and punched into an inner plate to obtain a powdery foundation for light red dark color portion correction having a hiding power of 14 and a red covering power of 12.

(Effect) When this powdery foundation was applied to a panel having a slight red dark color portion such as acne scars and blush on the face, the redness of the skin was effectively corrected,
Furthermore, it had a natural finish feeling close to that of bare skin.

[0063]

As described above, the method for adjusting the skin color of the present invention utilizes the filter effect of an interfering substance, so that the skin tone can be naturally enhanced without impairing the transparency of the skin. The color part can be made inconspicuous.

[Brief description of drawings]

FIG. 1 is an explanatory diagram for explaining the action of an interfering substance.

FIG. 2 is a view showing the hiding power and blue covering power of a blue-based skin color adjusting composition used in the method of the present invention in comparison with conventional products.

FIG. 3 is a diagram showing the hiding power and red covering power of a reddish skin color adjusting composition used in the method of the present invention in comparison with a conventional product.

[Explanation of symbols]

 1 thin film 2 monochromatic light 3a, 3b reflected interference light 4a, 4b transmitted interference light 5 medium

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiaki Yagida 1050 Shinba-cho, Kohoku-ku, Yokohama-shi, Kanagawa Stock company Shiseido Daiichi Research Center

Claims (8)

[Claims] 1. A skin color adjusting method characterized in that a dark color portion of skin is made inconspicuous by using a substance having interference light and arbitrarily adjusting the wavelength of the transmitted interference light. 2. A dark-colored portion of the skin is made inconspicuous by covering the skin with a substance in which the wavelength of the transmitted-interference light is adjusted so as to be a complementary interference color of the dark-colored portion of the skin. The method of adjusting skin color according to claim 1. 3. The wavelength of the transmitted interference light is 400 to 550 nm.
The skin color adjusting method according to claim 2, wherein the reddish dark color portion of the skin is made inconspicuous by coating the skin with a substance having a maximum reflection peak (blue to green). 4. The hiding power obtained by the measuring method of the following A is 1
A method in which a red-colored dark color portion of the skin is made inconspicuous by coating the skin with a substance for adjusting the skin color having a red covering power of 8 or less, which is 00 or less and is determined by the measuring method of B below. Item 4. The skin color adjustment method according to item 3. A: A substance for skin color adjustment was mixed with a nitrified cotton vehicle at a concentration of 80% by weight, and then applied to a hiding power test paper having white and black bases so as to have a thickness of 30 μm. The color difference ΔE of the colorimetric value is used to obtain the value by the following formula (1). [Equation 1] Hiding power = (1 ÷ ΔE) × 100 (1) B: A substance for adjusting skin color is mixed in a concentration of 80% by weight with a nitrified cotton vehicle, and then a red transparent PET film having a thickness of 30 is added.
It is coated so that it becomes μm, the incident light angle is 45 °, the light receiving angle is -1.
Colorimetry is performed at 5 °, and the value is calculated by the following formula (2). ## EQU00002 ## Red covering power = {(V-W) / V} .times.100 (2) (In the formula, V is the reflectance at 600 to 730 nm of the red transparent PET film to which the substance for skin color adjustment is not applied. And W represents the integrated value of the reflectance at 600 to 730 nm of the red transparent PET film coated with the substance for skin color adjustment.) 5. The red covering power is 10 or more.
The described skin color adjustment method. 6. The wavelength of the transmitted interference light is 400 to 550 nm.
The skin color adjusting method according to claim 2, wherein the bluish dark color portion of the skin is made inconspicuous by coating the substance having a minimum reflection peak (yellow to red) on the skin. 7. The hiding power obtained by the measuring method A described below is 1
A method of making a bluish dark color portion of the skin inconspicuous by coating the skin with a substance for skin color adjustment having a blue covering power of 40 or less, which is 00 or less and is determined by the measuring method of C below. Item 7. The skin color adjustment method according to item 6. A: A substance for skin color adjustment was mixed with a nitrified cotton vehicle at a concentration of 80% by weight, and then applied to a hiding power test paper having white and black bases so as to have a thickness of 30 μm. The color difference ΔE of the colorimetric value is used to obtain the value by the following formula (1). ## EQU3 ## Hiding power = (1 ÷ ΔE) × 100 (1) C: A substance for adjusting skin color is mixed with a nitrified cotton vehicle at a concentration of 80% by weight, and then a blue transparent PET film having a thickness of 30 is added.
It is coated so that it becomes μm, the incident light angle is 45 °, the light receiving angle is -1.
Colorimetry is performed at 5 ° and the value is calculated by the following formula (3). ## EQU00004 ## Blue covering power = {(X−Y) / X} × 100 (3) (In the formula, X is the reflectance at 400 to 550 nm of the blue transparent PET film to which the substance for skin color adjustment is not applied. , And Y represents the integrated value of the reflectance at 400 to 550 nm of the blue transparent PET film coated with the substance for skin color adjustment.) 8. The blue covering power is 45 or more.
The described skin color adjustment method.