KR20220169845A - Cosmetic composition for blocking blue light - Google Patents

Abstract

One aspect of the present invention provides a cosmetic composition comprising an Oenothera odorata extract, a Helichrysum angustifolium extract, and a Calendula officinalis extract as active ingredients. The cosmetic composition can significantly block blue light irradiated to the skin, and thus can reduce skin damage by reducing the amount of active oxygen generation and suppressing the inflammatory reaction.

Description

Cosmetic composition for blocking blue light {COSMETIC COMPOSITION FOR BLOCKING BLUE LIGHT}

The present invention relates to a cosmetic composition for blocking blue light comprising evening primrose extract, everlasting extract and marigold extract as active ingredients.

Electromagnetic waves are classified into long waves, medium waves, short waves, ultrashort waves, microwaves, infrared rays, visible rays, ultraviolet rays, X-rays, and γ-rays according to their wavelength and frequency energy. Among the visible light (80~780nm), which is an electromagnetic wave that can be seen with the eyes, blue light has a wavelength of 380~500nm, and it has the shortest wavelength and the strongest energy among the light that reaches the retina. Energy Visible) light.

Recently, as the use of electronic devices such as smartphones, laptops, computers, and TVs increases in daily life, the time of exposure to blue light generated from the display of the electronic device is gradually increasing. For example, in the case of general office workers, the average time per day exposed to natural light including ultraviolet rays is about 0.9 hours, whereas the average time per day exposed to blue light generated by electronic devices reaches about 10.2 hours. has the results of an investigation.

Blue light penetrates into the skin like ultraviolet rays, causes an oxidation reaction, and is known to have cytotoxicity. Blue light can be more harmful to the skin than UV rays because UVB penetrates down to the epidermis, UVA penetrates into the dermis layer, and blue light penetrates into the subcutaneous tissue layer deeper than the dermis layer. Based on this harmfulness controversy, research on the harmfulness of blue light to the skin continues, and according to the research results, the need for blue light blocking cosmetics is also increasing day by day.

Korean Patent Publication No. 10-2018-0001755 Korean Patent Publication No. 10-2018-0010634

One technical problem to be achieved by the present invention is to provide a cosmetic composition capable of effectively blocking blue light.

The technical problem to be achieved by the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

One aspect of the present invention provides a cosmetic composition for blocking blue light comprising evening primrose extract, everlasting extract and marigold extract as active ingredients.

According to one embodiment of the present invention, the evening primrose extract, everlasting extract and marigold extract may be mixed in a weight ratio of 0.9 to 1.1: 0.9 to 1.1: 0.9 to 1.1.

According to one embodiment of the present invention, the evening primrose extract, everlasting extract and marigold extract may be mixed in a weight ratio of 1: 1: 1.

According to one embodiment of the present invention, the extract may be in the form of an extract, a dry powder thereof, or formulated using the same.

According to one embodiment of the present invention, a UV blocking material may be further included.

Another aspect of the present invention provides a cosmetic comprising the cosmetic composition according to an embodiment of the present invention.

One aspect of the present invention is (a) preparing extracts of evening primrose, everlasting and marigold, respectively; and (b) mixing the obtained evening primrose extract, everlasting extract and marigold extract in a weight ratio of 0.9 to 1.1 : 0.9 to 1.1 : 0.9 to 1.1; It provides a method for producing a cosmetic composition for blocking blue light comprising a.

According to one embodiment of the present invention, in the mixing step, the obtained evening primrose extract, everlasting extract and marigold extract may be mixed in a weight ratio of 1: 1: 1.

According to one embodiment of the present invention, preparing the extract may include extracting, filtering, and drying the extract of the natural product.

According to one embodiment of the present invention, the cosmetic composition containing evening primrose extract, everlasting extract, and marigold extract as active ingredients can significantly block blue light irradiated to the skin, thereby reducing the amount of active oxygen generation and thereby reducing inflammation. By inhibiting the reaction, skin damage can be reduced. Furthermore, the cosmetic composition can also block ultraviolet rays, and by using natural materials, it is possible to minimize irritation reactions such as itching, blindness, redness, and swelling, which were disadvantages of synthetic blockers.

The inventors of the present invention have tried to develop a new substance that has excellent effect of blocking blue light and/or ultraviolet rays irradiated to the skin and has no side effects due to high skin stability, targeting natural-derived compounds. As a result, it was confirmed that the complex of evening primrose extract, everlasting extract and marigold extract significantly reduced the amount of skin color change by significantly blocking blue light, and completed the present invention.

One aspect of the present invention provides a cosmetic composition for blocking blue light comprising evening primrose extract, everlasting extract and marigold extract as active ingredients.

Evening primrose (Oenothera odorata Jacq.) is a plant belonging to the genus Needleflower and Evening Primrose, with a height of 50 to 90 cm and short hairs throughout. The leaves are alternate, line-shaped, lancet-shaped, with a sharp tip and shallow sawtooth on the edge. As major components, flavonoids and essential oils are contained in flowers, and amino acids are contained in seeds. Seed oil contains linolenic acid and natural gamma linolenic acid. All of these are precursors of prostaglandins, and are taken for high fever and sore throat caused by colds, and are used for hyperlipidemia because they suppress excessive accumulation of lipid components including cholesterol. In the private sector, oil extracted from seeds is used for chronic diseases such as diabetes and high blood pressure.

Everlasting is native to North Africa, Crete, and parts of Asia close to the Mediterranean Sea. It is a plant with silvery, elongated leaves and small yellow flower buds. When yellow flowers bloom, it has a curry fragrance, so it has a nickname called cauliflower. Steam extraction and distillation of this plant is everlasting oil, which has been used since ancient times as a valuable healing agent for the body. Emotionally, it is known to stabilize the mind and body and promote blood circulation. When applied to the skin, it improves skin regeneration ability, and is effective for boils, acne, dermatitis, wounds and eczema, so it is effective in wound regeneration, anti-inflammatory, and anti-inflammatory. It is known to have a bacterial function. It is also known to relieve muscle pain and joint pain.

Marigold (Calendula arvensis L.) is an annual plant of the Asteraceae family, and is an annual plant that grows to a height of about 20 cm to 60 cm and has relatively strong cold resistance. Marigold petals contain a large amount of xanthophylls pigments, which are orange-colored pigments and account for about 90% of the pigments in petals. It contains gasoline, bitterness, resin, and gum, so the flower decoction is used as a poultice or coating agent for burns, scalds, trauma, frostbite, eczema, and purulent acne.

As used herein, the term "extract" refers to an extract extracted from evening primrose, everlasting or marigold by a conventional method, as well as a dry powder thereof or any form formulated using the same, for example, pills, pastes, dispersions, etc. contains the form of

According to one embodiment of the present invention, the evening primrose extract, everlasting extract and marigold extract may be mixed in a weight ratio of 0.9 to 1.1: 0.9 to 1.1: 0.9 to 1.1, for example, 1: 1: 1. .

The cosmetic composition for blocking blue light according to an embodiment of the present invention can reduce skin damage by reducing the amount of active oxygen generation by blocking blue light irradiated to the skin and thereby suppressing an inflammatory reaction. In addition, the cosmetic composition exhibits an effect of significantly reducing the amount of change in skin color brightness caused by blue light and significantly reducing the amount of change in the index of melanin. Through this, it is expected that it will be able to have a "keratin exfoliation" action that inhibits the growth of acne disease-related microorganisms, regulates sebocyte division and sebum secretion, and improves "exfoliation" of hair follicles. In addition, it can show the effect of reducing the oil content, sebum secretion value, and the number of closed comedones and open comedones of acne-prone skin.

According to one embodiment of the present invention, the composite of evening primrose extract, everlasting extract and marigold extract is a natural substance, has no cytotoxic effect and is harmless to the human body. In particular, it is possible to minimize skin irritation reactions such as itching, sore eyes, redness, and swelling caused by the use of cosmetics containing conventional chemical blockers. Therefore, the complex can be safely used even for long-term use because there is little toxicity and side effects, and can be safely applied to cosmetics and external skin composition in particular.

The cosmetic composition for blocking blue light may further include a sunscreen material. The UV blocking material may reduce the passage of ultraviolet rays having a wavelength of about 280 nm to about 400 nm, and for example, zinc oxide, titanium dioxide, PABA (P-aminobenzioc zcid), shea butter, octyl salicylate, benzophenone, octo but is not limited to krylene or mixtures thereof.

The cosmetic composition according to one embodiment may be prepared in any formulation commonly prepared in the art, for example, a solution, suspension, emulsion, paste, gel, cream, lotion, powder, soap, surfactant- Contains cleansing, oil, powder foundation, emulsion foundation, wax foundation, pack, massage cream and spray, etc., but may be formulated, but is not limited thereto. Specifically, it may be prepared in the form of softening lotion, nutrient lotion, nutrient cream, massage cream, essence, eye cream, cleansing cream, cleansing foam, cleansing water, pack, spray, or powder.

When the formulation of the cosmetic composition according to one embodiment is a paste, cream or gel, animal oil, vegetable oil, wax, paraffin, starch, tracanth, cellulose derivative, polyethylene glycol, silicone, bentonite, silica, talc or oxide as a carrier component Zinc etc. can be used.

When the formulation of the cosmetic composition according to one embodiment is a solution or emulsion, a solvent, solubilizing agent or emulsifying agent as a carrier component, for example, water, ethanol, isopropanol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate , propylene glycol, 1,3-butyl glycol oil, glycerol aliphatic esters, polyethylene glycol, or sorbitan fatty acid esters may be used.

When the formulation of the cosmetic composition according to one embodiment is a suspension, as a carrier component, a liquid diluent such as water, ethanol or propylene glycol, ethoxylated isostearyl alcohol, polyoxyethylene sorbitol ester, and polyoxyethylene sorbitan ester. A suspending agent, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar or tracanth and the like can be used.

When the formulation of the cosmetic composition according to one embodiment is a powder or spray, lactose, talc, silica, aluminum hydroxide, calcium silicate or polyamide powder may be used as a carrier component, and in particular, in the case of a spray, additional chlorofluoro Propellants such as rhohydrocarbon, propane/butane or dimethyl ether may be used.

Another aspect of the present invention provides a cosmetic comprising the cosmetic composition according to an embodiment of the present invention.

Another aspect of the present invention is (a) preparing extracts of evening primrose, everlasting and marigold, respectively; and (b) mixing the obtained evening primrose extract, everlasting extract and marigold extract in a weight ratio of 0.9 to 1.1 : 0.9 to 1.1 : 0.9 to 1.1; It provides a method for producing a cosmetic composition for blocking blue light comprising a.

In this aspect, the content described in the above aspect is incorporated within the range overlapping with the content described in the above aspect.

According to one embodiment, the method of manufacturing a cosmetic for blocking blue light includes preparing extracts of evening primrose, everlasting, and marigold, respectively. The amount and method of use of raw materials and other materials used in each extract are the same in principle, but may be performed in a range and method recognized as the same at the level of a general technician in the art.

The raw materials used for extraction, that is, evening primrose, everlasting, and marigold, can be used for extraction after drying their petals and/or stems and then pulverizing to a particle size of 5 mm or less, for example, 1 mm or less.

Evening primrose extract, everlasting extract, and/or marigold extract may be extracted using water or an organic solvent to have an extract form, and the extract may be used as a liquid form or concentrated and/or dried.

The organic solvent is, for example, methanol, ethanol, isopropanol, butanol, ethylene, acetone, hexane, ether, chloroform, ethyl acetate, butyl acetate, dichloromethane, N, N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), 1,3-butylene glycol, propylene glycol, or a mixture thereof, but is not limited thereto. Extraction can be carried out at room temperature or warmed under conditions in which the active components of the extract are not destroyed or minimized. Depending on the organic solvent used, the degree of extraction and loss of the active ingredient of the extract may differ, so an appropriate organic solvent may be selected in consideration of this. The extraction method may be by a method commonly used in the art, and includes, for example, cold needle extraction, ultrasonic extraction, reflux cooling extraction, and the like, but is not limited thereto.

According to one embodiment, preparing the extract may include filtering the obtained extract. Filtration is a process of removing floating solid particles from the extract, and for example, cotton, nylon, etc. may be used to filter out particles, or ultrafiltration, cryofiltration, centrifugation, etc. may be used, but is not limited thereto. In addition, a separation process by various chromatography (chromatography according to size, charge, hydrophobicity or affinity) may be further included.

According to one embodiment, preparing the extract may further include drying the filtrate. The step of drying the filtrate includes, for example, freeze drying, vacuum drying, hot air drying, spray drying, reduced pressure drying, foam drying, high frequency drying, infrared drying, etc., but is not limited thereto.

According to one embodiment, preparing the extract may further include a step of pulverizing the final dried extract.

According to one embodiment, the manufacturing method of the cosmetic for blocking blue light is a weight ratio of 0.9 to 1.1: 0.9 to 1.1: 0.9 to 1.1, for example, 1: 1: 1. It includes the step of mixing in a weight ratio of.

Hereinafter, referring to examples and experimental examples, a cosmetic composition according to an embodiment of the present invention and a manufacturing method thereof will be described in detail.

Example

Preparation Example 1. Preparation of extract

Evening primrose petals, everlasting flowers and stems, and marigold petals were thoroughly washed to completely remove foreign substances and impurities, dried in the shade at 20 to 35 ° C, and pulverized so that the size of each particle was 1 mm or less.

Each 100 g of the obtained powder was immersed in 10 L of 70% ethanol, and ultrasonically extracted twice for 24 hours. The obtained extract was filtered through filter paper (Advantes, No. 2) and concentrated under reduced pressure to prepare each extract.

In order to confirm the blue light blocking efficacy of the obtained extract, the blue light light transmittance (lx) was measured using a blue light light irradiator and light transmittance measuring module irradiated with blue light wavelengths (350 ~ 500 nm). The measurement was performed by measuring the light transmittance (lx) at three different positions of the PMMA plate and calculating the average value. The measurement results are shown in Table 1 below, and the blocking rate (%) was calculated according to Equation 1 below:

extract name Transmittance before application (lx) Transmittance after application (lx) Block rate (%) evening primrose extract 4665.5 3224.5 -30.8863 Everlasting Extract 4630.8 3214.7 -30.5804 marigold extract 4562.0 3123.5 -31.5333

Examples 1 to 13. Preparation of extract mixtures

Thirteen types of composites were prepared by mixing the evening primrose extract, the everlasting extract, and the marigold extract obtained in Preparation Example 1 at various weight ratios in Table 2 below.

Example evening primrose extract Everlasting Extract marigold extract Example 1 One 1.5 0.5 Example 2 One 0.5 1.5 Example 3 0.5 One 1.5 Example 4 0.5 1.5 One Example 5 1.5 One 0.5 Example 6 1.5 0.5 One Example 7 One One One Example 8 2 0.5 0.5 Example 9 0.5 2 0.5 Example 10 0.5 0.5 2 Example 11 3 0 0 Example 12 0 3 0 Example 13 0 0 3

Experimental Example 1. Confirmation of blue light blocking effect - skin color change

In order to evaluate the blue light blocking rate of the composite obtained in Example 1, skin color brightness before and after blue light irradiation was measured and compared.

Skin color was measured using a spectrophotometer (CM-2600d, Minolta, Japan). This equipment measures the spectral reflectance of the color of an object. It measures color using the tristimulus values method and calculates the color value with L ^* , a ^* , b ^* , which is the colorimetric system of CIE. L ^* a ^* b ^* In the color system, lightness is L ^* (Luminance parameters, brightness), and hue and chroma are a ^* (Chrominance parameters, green-to-red), b ^* (Chrominance parameters, color factor; blue-to-yellow).

In this experimental example, after measuring the skin color of the applied and uncoated areas of the left or right forearm three times at each evaluation time point (before and after blue light irradiation), the average value of L ^* value was analyzed, and shown in Table 3 below. The results are described. The blocking rate (%) was calculated according to Equation 2 below:

As a result of the experiment, in Example 7 in which the composition ratio of evening primrose extract, everlasting extract and marigold extract was mixed at 1: 1: 1, skin color brightness (L ^* value) was significantly reduced, indicating the best blue light blocking effect. .

Experimental Example 2. Confirmation of Blue Light Blocking Effect - Melanin Index (M.I.)

In order to evaluate the blue light blocking rate of the composite obtained in Example 1, the melanin index (MI) before and after blue light irradiation was measured and compared.

Melanin index was measured using Mexameter MX 18 (Courage-Khazaka Electronic, Germany). This device, as a reflectance photometer, measures the amount of light reflected from the skin from the light of the three wavelengths Green (564nm), Red (660nm), and Infrared (880nm) emitted from the probe. The amount of light can be calculated. The degree of reflection from irradiation of light rays having different types of wavelengths corresponding to melanin and erythema is indicated numerically by an optical measurement technique.

In this experimental example, the melanin index (M.I.) of the applied and uncoated areas of the left or right forearm was measured three times at the time of evaluation (before and after blue light irradiation), and then the average value was analyzed, and the results are shown in Table 4 below. has been described. The blocking rate (%) was calculated according to Equation 3 below:

Example application group Uncoated Block rate (%) Change in skin melanin index (ΔM.I.) Change in skin melanin index (ΔM.I.) Example 1 26.31 38.01 30.78137 Example 2 26.59 37.94 29.91566 Example 3 25.15 35.67 29.49257 Example 4 25.34 36.61 30.78394 Example 5 26.17 37.18 29.61269 Example 6 25.64 36.55 29.84952 Example 7 20.56 38.97 47.24147 Example 8 24.89 37.46 33.55579 Example 9 25.87 35.12 26.33827 Example 10 23.05 38.78 40.56215 Example 11 26.92 38.24 29.60251 Example 12 27.38 36.12 24.19712 Example 13 26.18 37.56 30.29819

As a result of the experiment, it was confirmed that the melanin index (M.I.) increased significantly in Example 7, in which the composition ratio of evening primrose extract, everlasting extract and marigold extract was mixed at 1: 1: 1, showing the best blue light blocking effect.

Experimental Example 3. Confirmation of cytotoxicity of the complex

The safety of the complex of evening primrose extract, everlasting extract and marigold extract to the human body was investigated. Specifically, a cytotoxicity test (MTT) was performed using HaCaT cells, a human keratinocyte line. HaCaT cells were treated with the complex of Example 7 at each concentration, and after 1 day of culture, the cytotoxic effect of the cells was measured with MTT (3-(4,5-dimetylthiazol-2-yl)2,5-diphenyltetrazolium bromide ) was measured using the analytical method. The results are listed in Table 5 below:

treatment concentration 0.001% 0.005% 0.01% 0.05% 0.1% cell viability
(Cell viability compared to negative control group) 105% 103% 101% 98% 100%

As a result of the experiment, it was confirmed that no significant cytotoxic effect was shown even when the concentration of the complex was treated up to 1,000 ppm.

Experimental Example 4. Confirmation of human safety of the composite

A skin patch test was performed on 30 subjects using the complex obtained in Example 7 on the upper arm using a Finn Chamber. The age of the subjects was 20 to 45 years old, the average age was 31.5 years old, and there were 7 males and 23 females. Those with psoriasis, eczema, or other skin lesions, pregnant or lactating women, or those taking contraceptives or antihistamines were excluded from this experiment.

Judgment was made at 30 minutes, 24 hours and 48 hours after removing the patch, and the degree of irritation was classified according to the criteria of the International Contact Dermatitis Research Group (ICDRG) for skin reactions described in Table 6 below. Means score was calculated according to Equations 4 to 7 below, and the presence or absence of irritation was determined according to the skin patch test result judgment table.

In the above equation, i = subject number 30 minutes after patch removal, j = subject number 24 hours after patch removal, and k = subject number 48 hours after patch removal, Score i, j, k = patch At 30 minutes, 24 hours, and 48 hours after removal, each evaluation result is applied to both responses, erythema and edema, as indicated by the score according to the ICDRG criteria.

Scores according to the judgment are listed in Table 7 below:

Grade Mean Score non-irritating (1) 0.00 - 0.75 mild irritation (2) 0.76 - 1.50 light stimulation (3) 1.51 - 2.50 medium stimulation (4) 2.51 - 4.00 strong stimulation (5) 4.01 -

After wiping the test site with 70% ethanol and drying it, 25ul of each sample was dropped into a pin chamber (Epitest Ltd, Finland) on the upper arm of 30 subjects, and then placed on the upper arm, the test site, and fixed to perform a skin patch test. performed. After removing the patch for 24 hours, after removing the patch, the test site was marked with a marking pen, and skin reactions at the test site were observed at 30 minutes, 24 hours, and 48 hours. The observation results were classified according to the criteria of the International Contact Dermatitis Research Society and the degree of irritation was classified according to the skin patch test result judgment table, and the results are shown in Table 8 below:

patient number Score 30 minutes 24 hours 48 hours One 0 0 0 2 0 0 0 3 0 0 0 4 0 0 0 5 0 0 0 6 0 0 0 7 0 0 0 8 0 0 0 9 0 0 0 10 0 0 0 11 0 0 0 12 0 0 0 13 0 0 0 14 0 0 0 15 0 0 0 16 0 0 0 17 0 0 0 18 0 0 0 19 0 0 0 20 0 0 0 21 0 0 0 22 0 0 0 23 0 0 0 24 0 0 0 25 0 0 0 26 0 0 0 27 0 0 0 28 0 0 0 29 0 0 0 30 0 0 0

As a result of the experiment, skin irritation was not observed in all cases after 30 minutes, 24 hours, and 48 hours after removing the patch using Example 7. The average irritation judgment score was 0.00, and it was determined to be non-irritating according to the criteria of Table 6 above.

Example 14. Preparation of skin external preparation containing the complex

In order to confirm whether the complex compound (ASAP-calm) is safe for human skin, skin external preparations containing the complex were prepared with the components and contents shown in Table 9 below, and then skin stability and clinical efficacy tests were performed. First, purified water, glycerin, and xanthan gum were mixed and dissolved at 75°C (aqueous phase), and the remaining ingredients except for the aqueous phase component and the complex were dissolved at 75°C (oil phase). The oil part was added to the water part and stirred with a homomixer (Korea, Hansung Engineering) to firstly emulsify, and the complex extract was finally added thereto. Next, after removing air bubbles generated in the mixed solution, it was cooled to room temperature to prepare an external preparation for skin.

ingredient content (%) control group test group complex extract 0 2 Caprylic/Capric Triglyceride 8 8 Hydrogenated vegetable oil 2 2 Hydrogenated Lecithin 2 2 Polyglyceryl-10 Oleate 0.4 0.4 vegetable squalene 5 5 glycerin 3 3 propanediol 5 5 xanthan gum 0.3 0.3 tocopherol 0.1 0.1 antiseptic Appropriate amount Appropriate amount incense Appropriate amount Appropriate amount Purified water To 100 To 100 Total 100 100

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting.

Terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "having" are intended to designate that there is a feature, number, step, operation, component, or combination thereof described in the specification, but one or more other features or numbers However, it should be understood that it does not preclude the presence or addition of steps, operations, components, or combinations thereof.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present invention.

Claims (10)

A cosmetic composition for blocking blue light comprising evening primrose extract, everlasting extract and marigold extract as active ingredients.
According to claim 1,
The evening primrose extract, everlasting extract and marigold extract are mixed in a weight ratio of 0.9 to 1.1: 0.9 to 1.1: 0.9 to 1.1.
According to claim 1,
The evening primrose extract, everlasting extract and marigold extract are mixed in a weight ratio of 1: 1: 1 cosmetic composition.
According to claim 1,
The extract is a cosmetic composition, characterized in that in the form of an extract, its dry powder or formulated using the same.
According to claim 1,
The extract is a cosmetic composition, characterized in that extracted using water or an organic solvent, or derived therefrom.
According to claim 1,
A cosmetic composition further comprising a sunscreen material.
A cosmetic comprising the cosmetic composition according to any one of claims 1 to 6.
(a) preparing extracts of evening primrose, everlasting and marigold, respectively; and
(b) mixing the obtained evening primrose extract, everlasting extract and marigold extract in a weight ratio of 0.9 to 1.1 : 0.9 to 1.1 : 0.9 to 1.1;
Method for producing a cosmetic composition for blocking blue light comprising a.
According to claim 8,
In the mixing step, the obtained evening primrose extract, everlasting extract and marigold extract are mixed in a weight ratio of 1: 1: 1.
According to claim 8,
The method characterized in that the step of preparing the extract comprises the steps of extracting, filtering and drying the extract of the natural product.