Mask based on selenium-rich tea active ingredients and preparation process thereof

Abstract

The invention discloses a facial mask based on selenium-rich tea active ingredients and a preparation process thereof, and relates to the technical field of cosmetics, the facial mask is composed of a facial mask base material and facial mask liquid, the facial mask liquid comprises traditional Chinese medicine compound extract, selenium-rich tea extract, a humectant, an emulsifier and other raw materials, the traditional Chinese medicine compound extract is prepared from five traditional Chinese medicines including angelica sinensis, astragalus membranaceus and the like through a water decoction-vacuum concentration process, and the selenium-enriched tea extract is prepared by matching an ultrasonic-reflux combined extraction method with a compound extraction solvent. The problems that a traditional mask is single in effect, poor in component compatibility and the like are solved, the mask has the multiple effects of moisturizing, resisting oxidation, resisting inflammation, relieving and the like, the raw materials are natural or mild components, free of irritant preservatives, essence and pigments, and the mask is suitable for people with various skin types including sensitive skin, can be used for a long time and is higher in safety.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, specifically to a composite facial mask that combines traditional Chinese medicine compound with the active ingredients of selenium-rich tea and its preparation process. It is suitable for people with various skin types who need gentle skin care and want to improve sub-healthy conditions such as dryness, dullness, and sensitivity. Background Technology

[0002] With the fast pace of life, increased environmental pollutants, and the effects of ultraviolet radiation, sub-healthy skin problems are becoming increasingly common, such as dryness, dullness, roughness, sensitivity, redness, and oxidative aging. Consumers are increasingly demanding skincare products that are both effective and safe. As a convenient and efficient skincare carrier, face masks can quickly replenish skin nutrients and alleviate skin problems, making them an important category in daily skincare.

[0003] Traditional Chinese medicine skincare has a long history, and its natural, gentle, and synergistic effects are highly valued. Classic Chinese herbal ingredients such as angelica, astragalus, and poria cocos have effects such as promoting blood circulation, nourishing blood, anti-oxidation, and moisturizing and soothing, which can regulate skin condition from the root. Selenium-rich tea, as a special type of tea, not only contains tea polyphenols, theanine, and other inherent active substances in tea, but is also rich in organic selenium, exhibiting outstanding performance in anti-oxidation, free radical scavenging, enhancing skin barrier function, and anti-inflammatory and soothing effects.

[0004] Currently, existing related mask technologies have many shortcomings:

[0005] First, traditional face masks have a single active ingredient, making it difficult to achieve multi-dimensional and comprehensive skin care and solve multiple skin problems at the same time. Moreover, the extraction efficiency of active ingredients is low. Traditional extraction methods, such as single hot water extraction and simple ethanol extraction, not only result in insufficient dissolution rates of tea polyphenols, organic selenium, and water-soluble and fat-soluble active ingredients in selenium-rich tea and traditional Chinese medicine, but also easily cause the inactivation of heat-sensitive active substances.

[0006] In addition, traditional mask formulas have poor compatibility and stability. The Chinese herbal ingredients and selenium-rich tea ingredients are prone to incompatibility in the system. Furthermore, the active ingredients are easily degraded by external environmental factors such as temperature and light, resulting in a short shelf life and unstable skin care effects. Moreover, the skin feel and user experience are not good. Some masks have problems such as sticky texture, slow absorption, and obvious residue after application. Long-term use may even lead to skin dependence or irritation.

[0007] To address the aforementioned issues, this invention has developed a facial mask based on the active ingredients of selenium-rich tea and its preparation process. This invention scientifically combines traditional Chinese medicine formulas with selenium-rich tea, optimizes the extraction process to achieve efficient retention of active ingredients, improves formula compatibility and stability, and provides a composite facial mask and its preparation process that balances excellent skin feel and safety. This has significant market value and application prospects. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a facial mask based on the active ingredients of selenium-rich tea and its preparation process, thus solving the problems mentioned in the background section.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a facial mask based on the active ingredients of selenium-rich tea, comprising a mask substrate and a mask liquid, wherein the mask liquid is composed of the following raw materials in parts by weight: 6-12 parts of traditional Chinese medicine compound extract, 5-18 parts of selenium-rich tea extract, 4-12 parts of moisturizer, 0-6 parts of plant oil, 0.5-2 parts of emulsifier, 0.1-0.8 parts of thickener, 0.3-2.5 parts of soothing agent, 0.1-0.5 parts of preservative, 0.01-0.1 parts of pH adjuster, and 52.4-84 parts of deionized water.

[0010] As a further technical solution of the present invention, the traditional Chinese medicine compound extract is prepared from the following traditional Chinese medicine raw materials in parts by weight: 3-6 parts of Angelica sinensis, 2-5 parts of Astragalus membranaceus, 4-7 parts of Poria cocos, 1-3 parts of Glycyrrhiza uralensis, and 2-4 parts of Lonicera japonica.

[0011] As a further technical solution of the present invention, the preparation steps of the traditional Chinese medicine compound extract are as follows:

[0012] S1. Wash Angelica sinensis, Astragalus membranaceus, Poria cocos, Glycyrrhiza uralensis and Lonicera japonica separately, then dry them in an oven at 60-70℃ until constant weight, then pulverize them and pass them through an 80-100 mesh sieve, and mix them evenly to obtain Chinese herbal medicine powder.

[0013] S2. Mix the above-obtained Chinese herbal medicine powder with deionized water at a material-to-liquid ratio of 1:15-1:25 and soak for 1-2 hours to fully wet the Chinese herbal medicine raw materials.

[0014] S3. Then heat to 90-100℃ and decoct 2-3 times, each time for 1-1.5 hours. Combine the decoctions from multiple decoctions to ensure that the water-soluble active ingredients are fully dissolved.

[0015] S4. Finally, filter the combined decoction to remove the dregs, take the filtrate, and concentrate it under reduced pressure at a vacuum of 0.06-0.08 MPa and a temperature of 55-65℃ to a paste with a relative density of 1.05-1.12, thus obtaining the Chinese herbal compound extract. This process can effectively preserve the active ingredients in Chinese herbal medicine that promote blood circulation, nourish blood, moisturize and soothe.

[0016] As a further technical solution of the present invention, the preparation steps of the selenium-enriched tea extract are as follows:

[0017] S1. Select fresh selenium-rich tea leaves with a selenium content ≥0.2mg / kg, wash them clean, dry them in an oven at 60-70℃ until constant weight, pulverize them and pass them through a 100-140 mesh sieve to obtain selenium-rich tea powder.

[0018] S2. Mix the selenium-enriched tea powder with the compound extraction solvent at a material-to-liquid ratio of 1:12-1:25. The compound extraction solvent is composed of 50%-75% ethanol solution and propylene glycol at a mass ratio of 3-5:1 to enhance the solubility of active ingredients with different polarities.

[0019] S3. Ultrasonic extraction for 20-50 minutes at an ultrasonic power of 300-600W and a temperature of 40-55℃ is carried out to break down the cell walls of tea leaves and improve the dissolution efficiency of active ingredients. Then, reflux extraction is carried out at 70-100℃ for 1-2.5 hours to further extract the residual active ingredients.

[0020] S4. After extraction, filter to remove tea residue, take the filtrate, and concentrate it under reduced pressure at a vacuum of 0.06-0.08 MPa and a temperature of 50-65℃ until there is no alcohol taste, to obtain selenium-enriched tea extract. This process can simultaneously improve the extraction rate of active ingredients such as tea polyphenols, organic selenium, and theanine, and reduce the inactivation of heat-sensitive components.

[0021] As a further technical solution of the present invention, the moisturizer is selected from two or more of glycerin, sodium hyaluronate, ceramide, panthenol, and propylene glycol, wherein the weight of sodium hyaluronate does not exceed 1 / 3 of the total weight of the moisturizer, so as to ensure the moisturizing effect while avoiding the stickiness of the system.

[0022] The emulsifier is one or more of cetearyl alcohol polyether-20, glyceryl stearate, and polyglycerol-3-methyl glucoside distearate, used to improve the compatibility of the water and oil phases and make the mask liquid have a uniform and delicate texture.

[0023] The thickener is selected from one or more of carbomer, xanthan gum, hydroxyethyl cellulose, and hydroxypropyl methyl cellulose to adjust the viscosity of the mask liquid and improve its adhesion to the mask substrate.

[0024] As a further technical solution of the present invention, the plant oil is selected from one or more of jojoba oil, olive oil, and almond oil. When plant oil is added to the formula, its weight part is controlled at 2-6 parts, which can enhance the skin's moisturization and barrier repair ability.

[0025] As a further technical solution of the present invention, the soothing agent is selected from one or more of allantoin, purslane extract, dipotassium glycyrrhizate, and panthenol, which enhances the anti-inflammatory and soothing effects of the mask and relieves skin sensitivity and redness.

[0026] The preservative is selected from one or more of phenoxyethanol, ethylhexylglycerin, capryloyl hydroxamic acid, methylparaben, and propylparaben to ensure the product's microbial stability during its shelf life and to ensure it is non-irritating.

[0027] As a further technical solution of the present invention, the pH adjuster is selected from one or more of citric acid, sodium citrate, and triethanolamine, and is used to adjust the pH value of the mask liquid to 5.0-6.5, which is close to the pH value of human skin, thereby reducing irritation and improving the comfort of use.

[0028] As a further technical solution of the present invention, the mask substrate is selected from one of silk mask fabric, bio-cellulose mask fabric, bamboo fiber mask fabric, and Tencel mask fabric, and its basis weight is 35-50g / m². 2 With an absorption rate of ≥8 times, it ensures that it can fully absorb and hold the mask liquid, while adhering to the skin and having excellent breathability.

[0029] A preparation process for a facial mask based on the active ingredients of selenium-rich tea specifically includes the following steps:

[0030] Step 1: Prepare the extract according to the above-mentioned preparation steps for traditional Chinese medicine compound extract, and then prepare the extract according to the above-mentioned preparation steps for selenium-enriched tea extract.

[0031] Step 2: Add the thickener to deionized water, stir to disperse evenly, soak for 20-35 minutes to allow the thickener to fully swell, then heat to 75-85℃, stir until completely dissolved, keep warm for 10-20 minutes to obtain a homogeneous and stable aqueous phase;

[0032] Step 3: If the formula contains vegetable oil, mix the vegetable oil with the emulsifier, heat to 70-80℃, stir until melted and mixed evenly. If the formula does not contain vegetable oil, directly heat the emulsifier to 70-80℃, stir until melted, and obtain the oil phase.

[0033] Step 4: Slowly add the oil phase to the water phase while stirring at a speed of 800-1200 r / min for 15-25 min to form a uniform and fine emulsion, ensuring that the oil and water phases are fully mixed.

[0034] Step 5: Cool the emulsion to 40-45℃, then add the moisturizer, traditional Chinese medicine compound extract, selenium-rich tea extract, soothing agent, and preservative in sequence while stirring to ensure that all ingredients are evenly dispersed. Then, use a pH adjuster to adjust the pH of the system to 5.0-6.5 and continue stirring for 10-15 minutes to obtain a uniform and stable mask liquid.

[0035] Step 6: Soak the mask substrate in the mask liquid for 15-25 minutes to allow the substrate to fully absorb the mask liquid. Then, vacuum seal the mask to obtain the Chinese herbal selenium-enriched tea composite mask.

[0036] This invention provides a facial mask based on the active ingredients of selenium-rich tea and its preparation process, which has the following advantages compared with the prior art:

[0037] 1. A facial mask based on the active ingredients of selenium-rich tea and its preparation process, which scientifically combines traditional Chinese medicine compound such as angelica and astragalus with selenium-rich tea extract. The blood-activating, blood-nourishing, moisturizing and soothing ingredients of the traditional Chinese medicine compound and the antioxidant, barrier-strengthening and anti-inflammatory ingredients of selenium-rich tea work synergistically to achieve the skin care effect of internal nourishment and external protection. It can improve multiple problems such as dry and dehydrated skin, dullness and roughness at the same time, and the skin care effect is more comprehensive and significant.

[0038] 2. A facial mask based on the active ingredients of selenium-enriched tea and its preparation process. By targeting the component characteristics of traditional Chinese medicine and selenium-enriched tea, targeted and optimized extraction processes are adopted respectively. The traditional Chinese medicine compound adopts a water decoction-reduced pressure concentration process to maximize the retention of water-soluble active ingredients, while the selenium-enriched tea adopts an ultrasonic-reflux combined extraction method, combined with an ethanol-propylene glycol composite extraction solvent, which significantly improves the dissolution rate of fat-soluble and water-soluble active ingredients such as tea polyphenols and organic selenium. Moreover, the extraction conditions are mild, reducing the inactivation of heat-sensitive active ingredients and ensuring the content and activity of effective ingredients in the facial mask.

[0039] 3. A facial mask based on the active ingredients of selenium-rich tea and its preparation process, by rationally selecting emulsifiers, thickeners and various auxiliary ingredients, and improving the formula ratio, solves the compatibility problem between the Chinese medicine ingredients and the selenium-rich tea ingredients, making the mask liquid have a uniform and delicate texture, and a high degree of adhesion to the mask substrate. After application, the skin absorbs it quickly without any residue. At the same time, it can replenish the skin with sufficient moisture and nutrients, making the skin moisturized, delicate and radiant, greatly improving the user experience. In addition, the raw materials of this invention use natural or mild ingredients, without irritating preservatives, fragrances and pigments, making it suitable for all skin types, including sensitive skin, and can be used for a long time with higher safety. Attached Figure Description

[0040] Figure 1 This is a process flow diagram of a facial mask based on the active ingredients of selenium-rich tea and its preparation process. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1

[0043] A traditional Chinese medicine selenium-enriched tea composite facial mask, comprising a silk mask sheet (weight 35g / m²). 2The product contains a mask with an absorption rate of 8 times and a facial mask liquid. The facial mask liquid is composed of the following ingredients in parts by weight: 6 parts of traditional Chinese medicine compound extract, 5 parts of selenium-rich tea extract, 3 parts of glycerin, 1 part of sodium hyaluronate, 0.5 parts of cetearyl alcohol polyether-20, 0.1 parts of carbomer, 0.3 parts of allantoin, 0.1 parts of phenoxyethanol, 0.02 parts of citric acid, and 84 parts of deionized water.

[0044] The compound extract of traditional Chinese medicine is prepared from the following parts by weight of Chinese medicinal raw materials: 3 parts Angelica sinensis, 2 parts Astragalus membranaceus, 4 parts Poria cocos, 1 part Glycyrrhiza uralensis, and 2 parts Lonicera japonica.

[0045] A preparation process for a traditional Chinese medicine selenium-enriched tea composite facial mask includes the following steps:

[0046] Step 1: Clean Angelica sinensis, Astragalus membranaceus, Poria cocos, Glycyrrhiza uralensis, and Lonicera japonica separately, dry them in a 60℃ oven until constant weight, pulverize them and pass them through an 80-mesh sieve, mix them evenly to obtain a mixed powder of Chinese medicine. Then mix the mixed powder of Chinese medicine with deionized water at a ratio of 1:15, soak for 1 hour, heat to 90℃ and decoct twice, 1 hour each time, combine the decoctions, filter and collect the filtrate, concentrate it under reduced pressure at a vacuum degree of 0.06MPa and a temperature of 55℃ to a paste with a relative density of 1.05, and obtain the Chinese medicine compound extract.

[0047] Step 2: Select fresh selenium-rich tea leaves with a selenium content of 0.2 mg / kg, wash them clean, and dry them in a 60℃ oven until constant weight. After pulverizing, pass the powder through a 100-mesh sieve to obtain selenium-rich tea powder. Then, mix the selenium-rich tea powder with a compound extraction solvent (50% ethanol solution and propylene glycol in a mass ratio of 3:1) at a material-to-liquid ratio of 1:12. Then, ultrasonically extract the tea for 20 minutes at an ultrasonic power of 300W and a temperature of 40℃, followed by reflux extraction at 70℃ for 1 hour. Finally, filter the filtrate and concentrate it under reduced pressure at a vacuum of 0.06 MPa and a temperature of 50℃ until there is no alcohol taste to obtain the selenium-rich tea extract.

[0048] Step 3: Add carbomer to deionized water, stir to disperse evenly, soak for 20 minutes, heat to 75°C, stir until completely dissolved, keep warm for 10 minutes, and obtain the aqueous phase;

[0049] Step 4: Heat cetearyl alcohol polyether-20 to 70°C and stir until it melts to obtain the oil phase;

[0050] Step 5: Slowly add the oil phase to the aqueous phase, stirring at 800 r / min for 15 min to form a uniform emulsion;

[0051] Step 6: Cool the emulsion to 40°C, then add glycerin, sodium hyaluronate, traditional Chinese medicine compound extract, selenium-enriched tea extract, allantoin, and phenoxyethanol in sequence, and stir well.

[0052] Step 7: Adjust the pH of the system to 5.0 with citric acid, and continue stirring for 10 minutes to obtain the mask solution;

[0053] Step 8: Soak the silk mask sheet in the mask liquid for 15 minutes, then vacuum seal it.

[0054] Example 2

[0055] A traditional Chinese medicine selenium-enriched tea composite facial mask, comprising a bio-cellulose mask sheet (42g / m²). 2 The product contains a mask with a water absorption ratio of 10 times and a mask liquid. The mask liquid is composed of the following ingredients in parts by weight: 9 parts of traditional Chinese medicine compound extract, 13 parts of selenium-rich tea extract, 4 parts of glycerin, 2 parts of ceramide, 4 parts of olive oil, 1.2 parts of glyceryl stearate, 0.4 parts of xanthan gum, 1.5 parts of purslane extract, 0.3 parts of ethylhexylglycerin, 0.06 parts of sodium citrate, and 74.54 parts of deionized water.

[0056] The traditional Chinese medicine compound extract is prepared from the following parts by weight of traditional Chinese medicine raw materials: Angelica sinensis 4.5 parts, Astragalus membranaceus 3.5 parts, Poria cocos 5.5 parts, Glycyrrhiza uralensis 2 parts, and Lonicera japonica 3 parts.

[0057] A preparation process for a traditional Chinese medicine selenium-enriched tea composite facial mask includes the following steps:

[0058] Step 1: Wash Angelica sinensis, Astragalus membranaceus, Poria cocos, Glycyrrhiza uralensis, and Lonicera japonica thoroughly, dry them in an oven at 65℃ until constant weight, pulverize them and pass them through a 90-mesh sieve, mix them evenly to obtain a mixed powder of Chinese medicine. Then mix the mixed powder of Chinese medicine with deionized water at a ratio of 1:20, soak for 1.5 hours, heat to 95℃ and decoct 3 times, 1.2 hours each time, combine the decoctions, filter and collect the filtrate, concentrate it under reduced pressure at a vacuum of 0.07MPa and a temperature of 60℃ to a paste with a relative density of 1.08, thus obtaining the Chinese medicine compound extract.

[0059] Step 2: Select fresh selenium-enriched tea leaves with a selenium content of 0.3 mg / kg, wash them clean, and dry them in a 65℃ oven until constant weight. After pulverizing, pass the powder through a 120-mesh sieve to obtain selenium-enriched tea powder. Mix the selenium-enriched tea powder with a compound extraction solvent (62% ethanol solution and propylene glycol in a mass ratio of 4:1) at a material-to-liquid ratio of 1:18. Then, extract the extract by ultrasonic extraction at 450W power and 50℃ for 38 minutes, followed by reflux extraction at 80℃ for 1.5 hours. Finally, filter the extract and concentrate it under reduced pressure at 0.07MPa vacuum and 55℃ until there is no alcohol taste to obtain the selenium-enriched tea extract.

[0060] Step 3: Add xanthan gum to deionized water, stir to disperse evenly, soak for 25 minutes, heat to 80°C, stir until completely dissolved, keep warm for 15 minutes to obtain the aqueous phase;

[0061] Step 4: Mix olive oil and glyceryl stearate, heat to 75°C, stir until melted and evenly mixed to obtain the oil phase;

[0062] Step 5: Slowly add the oil phase to the aqueous phase, stirring at 1000 r / min for 20 min to form a uniform emulsion;

[0063] Step 6: Cool the emulsion to 42°C, then add glycerin, ceramide, traditional Chinese medicine compound extract, selenium-enriched tea extract, purslane extract, and ethylhexylglycerin in sequence, and stir until well mixed;

[0064] Step 7: Adjust the pH of the system to 5.8 with sodium citrate, and continue stirring for 12 minutes to obtain the mask solution;

[0065] Step 8: Soak the bio-cellulose mask sheet in the mask liquid for 20 minutes, then vacuum seal it.

[0066] Example 3

[0067] A traditional Chinese medicine selenium-enriched tea composite facial mask, comprising bamboo fiber mask cloth (weight 50g / m²). 2 The product contains a mask with a water absorption ratio of 12 times and a mask liquid. The mask liquid is composed of the following ingredients in parts by weight: 12 parts of traditional Chinese medicine compound extract, 18 parts of selenium-rich tea extract, 8 parts of panthenol, 4 parts of sodium hyaluronate, 6 parts of jojoba oil, 2 parts of polyglycerol-3-methylglucose distearate, 0.8 parts of hydroxypropyl methylcellulose, 2.5 parts of dipotassium glycyrrhizate, 0.5 parts of capryloyl hydroxamic acid, 0.1 parts of triethanolamine, and 52.4 parts of deionized water.

[0068] The compound extract of traditional Chinese medicine is prepared from the following parts by weight of Chinese medicinal materials: 6 parts Angelica sinensis, 5 parts Astragalus membranaceus, 7 parts Poria cocos, 3 parts Glycyrrhiza uralensis, and 4 parts Lonicera japonica.

[0069] A preparation process for a traditional Chinese medicine selenium-enriched tea composite facial mask includes the following steps:

[0070] Step 1: Wash Angelica sinensis, Astragalus membranaceus, Poria cocos, Glycyrrhiza uralensis, and Lonicera japonica thoroughly, dry them in a 70℃ oven until constant weight, pulverize them and pass them through a 100-mesh sieve, mix them evenly to obtain a mixed powder of Chinese medicine. Mix the mixed powder of Chinese medicine with deionized water at a ratio of 1:25, soak for 2 hours, then heat to 100℃ and decoct 3 times, 1.5 hours each time. Combine the decoctions, finally filter and collect the filtrate. Concentrate the filtrate under reduced pressure at a vacuum of 0.08MPa and a temperature of 65℃ to a paste with a relative density of 1.12 to obtain the compound extract of Chinese medicine.

[0071] Step 2: Select fresh selenium-rich tea leaves with a selenium content of 0.4 mg / kg, wash them clean, and dry them in a 70℃ oven until constant weight. After pulverizing, pass the powder through a 140-mesh sieve to obtain selenium-rich tea powder. Then, mix the selenium-rich tea powder with a compound extraction solvent (75% ethanol solution and propylene glycol in a mass ratio of 5:1) at a material-to-liquid ratio of 1:25. Then, ultrasonically extract the tea for 50 minutes at an ultrasonic power of 600W and a temperature of 55℃, followed by reflux extraction at 100℃ for 2.5 hours. Finally, filter the filtrate and concentrate it under reduced pressure at a vacuum of 0.08 MPa and a temperature of 65℃ until there is no alcohol taste, thus obtaining the selenium-rich tea extract.

[0072] Step 3: Add hydroxypropyl methylcellulose to deionized water, stir to disperse evenly, soak for 35 minutes, heat to 85°C, stir until completely dissolved, keep warm for 20 minutes, and obtain the aqueous phase;

[0073] Step 4: Mix jojoba oil with polyglycerol-3-methylglucose distearate, heat to 80°C, and stir until melted and uniformly mixed to obtain the oil phase;

[0074] Step 5: Slowly add the oil phase to the aqueous phase, stirring at 1200 r / min for 25 min to form a uniform emulsion;

[0075] Step 6: Cool the emulsion to 45°C, then add panthenol, sodium hyaluronate, traditional Chinese medicine compound extract, selenium-enriched tea extract, dipotassium glycyrrhizate, and capryloyl hydroxamic acid in sequence, and stir until well mixed.

[0076] Step 7: Adjust the pH of the system to 6.5 with triethanolamine, and continue stirring for 15 minutes to obtain the mask solution;

[0077] Step 8: Soak the bamboo fiber mask sheet in the mask liquid for 25 minutes, then vacuum seal it.

[0078] Furthermore, to verify the performance of the mask of the present invention, tests were conducted on the content of active ingredients, skincare efficacy, stability, and safety, as detailed below:

[0079] Experimental test samples: the facial masks prepared in Examples 1, 2 and 3 of this invention, and the control group consisted of commercially available ordinary Chinese herbal facial masks and commercially available selenium-enriched tea facial masks.

[0080] Experimental instruments: High performance liquid chromatograph (HPLC), ultraviolet spectrophotometer, skin moisture meter, skin melanin meter, skin redness meter, stability test chamber, patch test device.

[0081] Experimental test subjects: 60 skin care volunteers aged 20-45 years, with skin types including dry, normal, oily and sensitive skin, were randomly divided into 4 groups of 15 people each, and used samples from Examples 1, 2 and 3 and the control group, respectively.

[0082] (1) Detection of active ingredient content: Ferulic acid (characteristic component of Angelica sinensis) and astragaloside A (characteristic component of Astragalus membranaceus) in the extract of traditional Chinese medicine compound were detected by HPLC. The content of tea polyphenols and organic selenium in selenium-enriched tea extract was detected by ultraviolet spectrophotometry. The results are shown in Table 1 below:

[0083]

[0084] As can be seen from the table above, the content of traditional Chinese medicine characteristic components and selenium-enriched tea active components in the samples of this invention are significantly higher than those in similar commercially available products, indicating that the optimized extraction process can effectively improve the dissolution and retention rate of active components.

[0085] (2) Skin care efficacy test: Volunteers used the sample continuously for 28 days. Skin-related indicators were measured before use, and after 7, 14, and 28 days of use. The results are as follows:

[0086] ① Skin moisture content test: The moisture content of the facial stratum corneum was measured using a skin moisture meter, in percentage (%). The results are shown in the table below:

[0087] sample Before use Use for 7 days Use for 14 days Use for 28 days Example 1 32.5±3.2 45.8±3.5 52.3±3.8 58.6±4.0 Example 2 33.1±3.0 48.5±3.6 55.7±3.9 62.4±4.2 Example 3 32.8±3.1 50.2±3.7 57.9±4.0 65.8±4.5 Commercially available Chinese herbal face masks 32.6±3.3 38.7±3.4 43.5±3.6 47.8±3.8 Commercially available selenium-enriched tea face masks 33.0±3.2 40.2±3.5 45.3±3.7 50.1±3.9

[0088] It is evident that the sample of this invention can rapidly and continuously increase skin moisture content, with an increase of 70%-102% after 28 days, which is significantly better than commercially available products, indicating excellent moisturizing effects.

[0089] ② Skin melanin content test: The skin melanin content was measured using a skin melanin analyzer. The unit is MIU. The results are shown in the table below:

[0090] sample Before use Use for 7 days Use for 14 days Use for 28 days Example 1 82.5±5.3 76.3±4.8 70.5±4.5 65.2±4.2 Example 2 83.2±5.1 74.1±4.6 67.8±4.3 61.5±4.0 Example 3 82.9±5.2 72.4±4.5 65.3±4.2 58.7±3.8 Commercially available Chinese herbal face masks 83.0±5.0 79.5±4.9 75.8±4.7 71.3±4.5 Commercially available selenium-enriched tea face masks 82.7±5.2 78.3±4.8 74.5±4.6 69.8±4.4

[0091] As shown in the table above, the sample of this invention can effectively reduce the melanin content of the skin. After 28 days, the melanin content decreased by 11%-29%, and the effect of improving dullness is significant, which is better than commercially available products. This is due to the synergistic effect of the blood-activating and blood-nourishing Chinese medicine and the antioxidant components of selenium-rich tea.

[0092] (3) Product safety test: In accordance with the "Cosmetic Safety Technical Specifications", 0.020-0.025g of sample was applied to the patch tester and applied to the inner side of the volunteer's forearm. The patch was removed after 24 hours. Skin reaction was observed at 0.5h, 24h and 48h after removal. The results are shown in the table below.

[0093]

[0094] As shown in the table above, the samples of this invention did not cause any irritation to any volunteers, while similar commercially available products showed slight irritation. This indicates that the raw materials selected for this invention are mild, the formula is highly safe, and it is suitable for use on sensitive skin.

[0095] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0096] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A facial mask based on the active ingredients of selenium-rich tea, characterized in that, The mask includes a mask base and a mask liquid, wherein the mask liquid is composed of the following raw materials in parts by weight: 6-12 parts of traditional Chinese medicine compound extract, 5-18 parts of selenium-rich tea extract, 4-12 parts of moisturizer, 0-6 parts of plant oil, 0.5-2 parts of emulsifier, 0.1-0.8 parts of thickener, 0.3-2.5 parts of soothing agent, 0.1-0.5 parts of preservative, 0.01-0.1 parts of pH adjuster, and 52.4-84 parts of deionized water.

2. A facial mask based on the active ingredients of selenium-rich tea according to claim 1, characterized in that, The herbal compound extract is prepared from the following herbal raw materials in parts by weight: Angelica sinensis 3-6 parts, Astragalus membranaceus 2-5 parts, Poria cocos 4-7 parts, Glycyrrhiza uralensis 1-3 parts, and Lonicera japonica 2-4 parts.

3. A facial mask based on the active ingredients of selenium-rich tea according to claim 2, characterized in that, The preparation steps of the traditional Chinese medicine compound extract are as follows: S1. Wash Angelica sinensis, Astragalus membranaceus, Poria cocos, Glycyrrhiza uralensis and Lonicera japonica separately, then dry them in an oven at 60-70℃ until constant weight, then pulverize them and pass them through an 80-100 mesh sieve, and mix them evenly to obtain Chinese herbal medicine powder. S2. Mix the above-obtained Chinese herbal medicine powder with deionized water at a material-to-liquid ratio of 1:15-1:25 and soak for 1-2 hours. S3. Then heat to 90-100℃ and decoct 2-3 times, each time for 1-1.5 hours, and combine the decoctions from multiple decoctions; S4. Finally, filter the combined decoction to remove the dregs, take the filtrate, and concentrate it under reduced pressure at a vacuum of 0.06-0.08 MPa and a temperature of 55-65℃ to a paste with a relative density of 1.05-1.12, thus obtaining the traditional Chinese medicine compound extract.

4. A facial mask based on the active ingredients of selenium-rich tea according to claim 1, characterized in that, The preparation steps of the selenium-enriched tea extract are as follows: S1. Select fresh selenium-rich tea leaves with a selenium content ≥0.2mg / kg, wash them clean, dry them in an oven at 60-70℃ until constant weight, pulverize them and pass them through a 100-140 mesh sieve to obtain selenium-rich tea powder. S2. Mix the selenium-enriched tea powder with the compound extraction solvent at a material-to-liquid ratio of 1:12-1:

25. The compound extraction solvent is composed of an ethanol solution with a volume fraction of 50%-75% and propylene glycol at a mass ratio of 3-5:

1. S3. Ultrasonic extraction for 20-50 min at an ultrasonic power of 300-600 W and a temperature of 40-55℃, followed by reflux extraction at 70-100℃ for 1-2.5 h. S4. After extraction, filter to remove tea residue, take the filtrate, and concentrate it under reduced pressure at a vacuum of 0.06-0.08 MPa and a temperature of 50-65℃ until there is no alcohol taste, to obtain selenium-enriched tea extract.

5. A facial mask based on the active ingredients of selenium-rich tea according to claim 1, characterized in that, The moisturizer is selected from two or more of glycerin, sodium hyaluronate, ceramide, panthenol, and propylene glycol, wherein the weight of sodium hyaluronate does not exceed 1 / 3 of the total weight of the moisturizer. The emulsifier is one or more of cetearyl alcohol polyether-20, glyceryl stearate, and polyglycerol-3-methyl glucoside distearate; The thickener is selected from one or more of carbomer, xanthan gum, hydroxyethyl cellulose, and hydroxypropyl methylcellulose.

6. A facial mask based on the active ingredients of selenium-rich tea according to claim 1, characterized in that, The vegetable oil is selected from one or more of jojoba oil, olive oil, and almond oil. When vegetable oil is added to the formula, its weight parts are controlled between 2 and 6 parts.

7. A facial mask based on the active ingredients of selenium-rich tea and its preparation process according to claim 1, characterized in that, The soothing agent is selected from one or more of allantoin, purslane extract, dipotassium glycyrrhizate, and panthenol; The preservative is selected from one or more of phenoxyethanol, ethylhexylglycerin, capryloyl hydroxamic acid, methylparaben, and propylparaben.

8. A facial mask based on the active ingredients of selenium-rich tea according to claim 1, characterized in that, The pH adjuster is selected from one or more of citric acid, sodium citrate, and triethanolamine, and is used to adjust the pH value of the mask liquid to 5.0-6.

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9. A facial mask based on the active ingredients of selenium-rich tea according to claim 1, characterized in that, The mask substrate is selected from one of the following: silk mask fabric, bio-cellulose mask fabric, bamboo fiber mask fabric, and Tencel mask fabric, with a basis weight of 35-50 g / m². 2 Water absorption ratio ≥ 8 times.

10. The facial mask based on the active ingredients of selenium-rich tea according to any one of claims 1-9, characterized in that, Its preparation process includes the following steps: Step 1: Prepare the extract according to the above-mentioned preparation steps for traditional Chinese medicine compound extract, and then prepare the extract according to the above-mentioned preparation steps for selenium-enriched tea extract. Step 2: Add the thickener to deionized water, stir to disperse evenly, soak for 20-35 minutes to allow the thickener to fully swell, then heat to 75-85℃, stir until completely dissolved, keep warm for 10-20 minutes to obtain a homogeneous and stable aqueous phase; Step 3: If the formula contains vegetable oil, mix the vegetable oil with the emulsifier, heat to 70-80℃, stir until melted and mixed evenly. If the formula does not contain vegetable oil, directly heat the emulsifier to 70-80℃, stir until melted, and obtain the oil phase. Step 4: Slowly add the oil phase to the aqueous phase while stirring. The stirring speed is 800-1200 r / min, and the stirring time is 15-25 min, to form a uniform and fine emulsion. Step 5: Cool the emulsion to 40-45℃, then add the moisturizer, traditional Chinese medicine compound extract, selenium-rich tea extract, soothing agent, and preservative in sequence while stirring to ensure that all ingredients are evenly dispersed. Then, use a pH adjuster to adjust the pH of the system to 5.0-6.5 and continue stirring for 10-15 minutes to obtain a uniform and stable mask liquid. Step 6: Soak the mask substrate in the mask liquid for 15-25 minutes to allow the substrate to fully absorb the mask liquid. Then, vacuum seal the mask to obtain the Chinese herbal selenium-enriched tea composite mask.

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