Novel freckle-removing cream as well as preparation method and application thereof

Abstract

The invention discloses novel freckle-removing cream as well as a preparation method and application thereof. The invention discloses novel freckle-removing cream as well as a preparation method and application thereof. The freckle-removing cream which is mild, non-irritating, long-acting and durable and has good permeability and stability is prepared by scientifically combining a plurality of natural traditional Chinese medicinal materials including prepared rehmannia root, liquorice, radix angelicae, bighead atractylodes rhizome, folium mori, rhizoma cyperi and the like and adopting a mild preparation process. The freckle-removing cream is suitable for various skin types, especially sensitive skin, and the rebound phenomenon after freckle removal is effectively reduced by comprehensively conditioning the health state of the skin. The preparation method comprises the four main steps of preparation of traditional Chinese medicine powder, decoction of traditional Chinese medicines, preparation of paste and mixing and forming. The invention also relates to application of the freckle-removing cream in nursing and treatment of skin stains. The application method comprises the following steps: cleaning the skin, uniformly smearing, using in the morning and evening, and nursing by matching with a moisturizing product. The method has the advantages of being easy to operate, safe, environmentally friendly, remarkable in effect and suitable for wide popularization.

Description

Technical Field

[0001] The invention relates to the technical field of freckle removing creams, in particular to a novel freckle removing cream and a preparation method and application thereof. Background Art

[0002] There are many kinds of freckle removal products on the market, including chemical freckle removal creams, plant extract freckle removal products and some freckle removal methods assisted by beauty equipment. These products and methods can help improve skin freckle problems to a certain extent, but there are still many limitations and shortcomings.

[0003] First, most of the common freckle removal products on the market rely on chemical ingredients, such as hydroquinone, kojic acid, vitamin C derivatives, etc. Although these ingredients can inhibit melanin production in the short term, long-term use may irritate the skin and even damage the skin barrier, causing redness, swelling, peeling and other adverse reactions. Especially on sensitive skin, the irritation of these chemical ingredients is particularly obvious, limiting the wide applicability of the products.

[0004] Secondly, many freckle removal products have obvious effects in the initial stage of use, but as the use time increases, the skin gradually develops tolerance to these active ingredients, resulting in weakened or stagnant freckle removal effects and failure to achieve the desired lasting effect. In addition, since the main mechanism of these products is to inhibit the production of melanin or accelerate its metabolism, they lack the ability to comprehensively regulate the root causes of freckle formation, resulting in unstable freckle removal effects and prone to rebound.

[0005] In addition, although some freckle removal products are advertised as "natural ingredients", due to the limitations of extraction technology and formula design, their active ingredient content is low and they cannot effectively penetrate the skin barrier, resulting in poor results. At the same time, natural plant ingredients have challenges in terms of compatibility and stability. If not handled properly, they are prone to oxidation and deterioration during storage or use, affecting the safety and effectiveness of the product.

[0006] Faced with these problems, the market urgently needs a new freckle removal product based on natural ingredients. Summary of the invention

[0007] The purpose of the present invention is to provide a new freckle removing cream and its preparation method and application, which has the advantages of being mild and non-irritating, having significant freckle removing effect and being long-lasting, and solves the problems of poor efficacy and high skin irritation of existing freckle removing products.

[0008] To achieve the above object, the present invention provides the following technical solution: a new freckle removal cream, comprising the following components

[0009] Chinese medicine powder group: Radix Rehmanniae Preparata, Radix Glycyrrhizae, Radix Rehmanniae, Folium Mori, Rhizoma Cyperi, Radix Angelicae Dahuricae, Rhizoma Bletillae, Rhizoma Atractylodis Macrocephalae, Radix Bupleuri, Pearl powder;

[0010] Basic ingredient group: deionized water, honey;

[0011] Auxiliary ingredient group: glycerin, almond oil, liquid paraffin.

[0012] Preferably, the weight ranges of the ingredients in the Chinese medicine powder group are as follows:

[0013] Rehmannia root: 20-40g, Licorice root: 10-30g, Rehmannia root: 10-30g, Mulberry leaf: 10-30g, Cyperus rotundus: 10-30g, Angelica dahurica: 10-30g, Bletilla striata: 10-30g, Atractylodes macrocephala: 10-30g, Bupleurum root: 10-30g, Pearl powder: 10-30g.

[0014] Preferably, the specific weight ratio of the Chinese medicine powder group is

[0015] 30g of Rehmannia root, 20g of Licorice root, 20g of Rehmannia root, 20g of Mulberry leaf, 20g of Cyperus rotundus, 20g of Angelica dahurica, 20g of Bletilla striata, 20g of Atractylodes macrocephala, 20g of Bupleurum chinense, and 20g of pearl powder.

[0016] Preferably, the specific contents of the basic component group and the auxiliary component group are as follows:

[0017] Basic ingredient group: deionized water 500ml, honey 15g;

[0018] Auxiliary ingredient group: glycerin 10ml, almond oil 30ml, liquid paraffin 10ml.

[0019] A method for preparing a novel freckle removing cream comprises the following steps

[0020] S1. Preparation of Chinese medicine powder

[0021] S11. Raw material selection:

[0022] Select Radix Rehmanniae Preparata, Radix Glycyrrhizae, Radix Rehmanniae, Folium Mori, Rhizoma Cyperi, Radix Angelicae Dahuricae, Rhizoma Bletillae, Rhizoma Atractylodis Macrocephalae, Radix Bupleuri as Chinese medicinal materials, and mix them according to weight ratio;

[0023] S12, cleaning and drying:

[0024] The selected Chinese medicinal materials are preliminarily cleaned to remove surface impurities and dust, and then dried in a ventilated and dry environment; the drying temperature is controlled between 40-60°C and the drying time is 6-8 hours to ensure that the Chinese medicinal materials reach an appropriate moisture content and avoid moisture and agglomeration during the crushing process;

[0025] S13, crushing and screening:

[0026] The dried Chinese medicinal materials are put into a grinder for crushing, and the crushed particle size is controlled between 80-100 meshes; after crushing, they are sieved through a sieve to remove coarse particles to ensure uniform fine powder;

[0027] S14, evenly mixed:

[0028] Mix all the sieved Chinese medicine powders evenly according to the proportions, use a low-speed mixer to mix for 10-15 minutes to ensure that all ingredients are fully and evenly distributed;

[0029] S2. Decoction of Chinese medicine

[0030] S21, add water to soak:

[0031] Add the mixed Chinese medicine powder into 500 ml of deionized water and let it soak for 30 minutes so that the medicinal materials can fully absorb water and facilitate the extraction of effective ingredients in the subsequent decoction process;

[0032] S22, decoction process:

[0033] Put the soaked Chinese medicine mixture into a frying pan, boil it over high heat, then turn to low heat and continue decocting after boiling; the decocting time is 30-40 minutes, until the medicinal liquid is concentrated to about 60ml;

[0034] S23, Filtration and Cooling:

[0035] After the decoction is completed, the medicinal liquid is filtered through multiple layers of gauze three times to remove the medicinal residues to obtain a clear Chinese medicinal juice; the Chinese medicinal juice is then naturally cooled to room temperature for use;

[0036] S3. Paste preparation

[0037] S31, paste preparation:

[0038] Mix the cooled Chinese medicine juice with 20g pearl powder and 15g honey, and stir at low speed for 10-15 minutes with a blender until a uniform paste is formed; control the speed during the stirring process to avoid bubbles;

[0039] S32, oil phase preparation:

[0040] Add 10 ml of glycerin, 30 ml of almond oil and 10 ml of liquid paraffin into a water-insulated heating device, and slowly heat to 70-80°C until all the oil phase components are completely melted to form a uniform oil phase mixture;

[0041] S4, Mixing and Forming

[0042] S41, oil phase and water phase mixing:

[0043] Heat the prepared oil phase and water phase to 90°C respectively, then slowly add the oil phase to the water phase, and stir with a high-speed stirrer at a speed of 800-1000rpm for 20-30 minutes to ensure that the water and oil phases are fully blended without stratification;

[0044] S42, cooling and molding:

[0045] After stirring is completed, the mixture is removed from water and cooled, and stirring is continued during the cooling process to maintain uniformity; the cooling temperature should be controlled at 25-30°C; when the mixture is cooled to a paste, it is placed in a pre-sterilized container and sealed for storage.

[0046] Preferably, in the S13 pulverizing step, the pulverizing environment is maintained at a low humidity of 30%-50%, the pulverized powder is immediately sieved, and the powder is stored in a dry and sealed container.

[0047] Preferably, in the decoction step S22, intermittent stirring is adopted, stirring is performed every 10 minutes, the stirring speed is 100-150 rpm, and filtering is performed immediately after decoction is completed.

[0048] Preferably, in the step of mixing the oil phase and the water phase in S41, the oil phase and the water phase are heated to approximately 90° C. before mixing, mixed at a constant temperature, and the stirring speed is gradually reduced from 1000 rpm to 500 rpm during the mixing process.

[0049] Preferably, in the cooling and molding step S42, the mixture is cooled away from water in a low temperature environment of 15-20°C and manually stirred every 5 minutes until the paste is completely cooled; after cooling, the paste is immediately filled into a sterilized container and sealed.

[0050] The application of a novel freckle removing cream comprises the following steps:

[0051] a) Before using the freckle cream, use a mild cleanser with a pH value between 5.5-6.5 to cleanse your facial skin, ensuring that there is no grease and dirt on the skin surface. The cleaning time is 1-2 minutes;

[0052] b) Take 0.5-1.0g of the new freckle cream and apply it evenly to the skin of the freckle area, with an application area of ​​1-2 square centimeters, and gently massage for 3-5 minutes to promote the penetration of the active ingredients. The massage intensity is 100-150g / cm 2 ;

[0053] c) Use once in the morning and evening every day, with an interval of 12 hours between each use. When used at night, increase the dosage by 0.5 grams to enhance the freckle removal effect;

[0054] d) Continuous use for 30 days is a course of treatment. After each course of treatment, the skin condition should be evaluated to determine whether to continue using the product. It is recommended that the product be used for a maximum of 3 courses of treatment, with an interval of 7 days between each course of treatment.

[0055] e) While using the freckle cream, use moisturizing products with a water content of 50%-70% to maintain skin moisture and prevent dryness. The frequency of use of moisturizing products is 2-3 times a day.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] 1. The present invention achieves the effect of being mild and non-irritating and suitable for sensitive skin by setting up a scientific combination of multiple natural Chinese medicinal materials, effectively reducing the skin irritation problem that may be caused during use.

[0058] 2. The present invention achieves a long-lasting freckle removal effect by combining mulberry leaves, angelica dahurica and other ingredients with other Chinese medicinal materials, thus avoiding the problem that the effect of traditional freckle removal products weakens after being used for a period of time.

[0059] 3. The present invention uses almond oil, glycerin and liquid paraffin as the base to achieve good permeability and stability, ensuring that the active ingredients can be better absorbed by the skin and extending the shelf life of the product.

[0060] 4. The present invention achieves the effect of reducing the rebound phenomenon after freckle removal by comprehensively regulating the health state of the skin, making the freckle removal effect more stable and lasting. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 This is a schematic diagram of the component distribution of the novel freckle removing cream of the present invention;

[0062] Figure 2 This is a schematic diagram of the weight range of the Chinese medicine powder group of the present invention;

[0063] Figure 3 This is a schematic diagram of the specific contents of the basic component group and the auxiliary component group of the present invention;

[0064] Figure 4 The present invention is a flow chart of the preparation method of the novel freckle removing cream;

[0065] Figure 5 This is a schematic diagram of the environmental control in the crushing step of the present invention;

[0066] Figure 6 This is a schematic diagram of intermittent stirring and filtering in the decoction step of the present invention;

[0067] Figure 7 It is a schematic diagram of temperature and stirring control in the step of mixing the oil phase and the water phase of the present invention;

[0068] Figure 8 It is a schematic diagram of low temperature and manual stirring in the cooling and forming steps of the present invention;

[0069] Fig. 9It is a schematic diagram of the application steps of the novel freckle removing cream of the present invention. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] See also Figures 1 to 9 The present invention provides a technical solution: a new freckle removal cream, comprising the following components:

[0072] Chinese medicine powder set

[0073] The Chinese medicine powder group of the present invention comprises ingredients such as Radix Rehmanniae Preparata, Radix Glycyrrhizae, Radix Rehmanniae, Folium Mori, Rhizoma Cyperi, Radix Angelicae Dahuricae, Rhizoma Bletillae, Rhizoma Atractylodis Macrocephalae, Radix Bupleuri, pearl powder, etc. These Chinese medicines are selected based on their skin care and whitening effects widely recognized in traditional medicine.

[0074] Rehmannia root: Its main function is to nourish yin and blood, promote skin metabolism, and help improve uneven skin tone and spots. Its nourishing effect on the skin can solve the problem of skin being easily irritated by chemical ingredients mentioned in the background technology, and provide a gentle care effect.

[0075] Licorice: It has anti-inflammatory, soothing and anti-allergic effects, which can reduce skin irritation that may be caused during the freckle removal process. In addition, the glycyrrhizic acid in licorice also has the effect of inhibiting the production of melanin, helping to reduce spots.

[0076] Rehmannia root: When used with Rehmannia root cooked, it further enhances the effect of nourishing the liver and kidneys, moisturizing the skin, keeping the skin soft, smooth, and preventing the aggravation of pigmentation caused by dryness.

[0077] Mulberry leaf: It has a whitening effect and can inhibit the activity of tyrosinase, thereby reducing the production of melanin. It directly targets the formation process of spots and has a significant freckle removal effect.

[0078] Cyperus rotundus: regulates Qi and blood, relieves pain, helps improve blood circulation in the skin, promotes better absorption of the active ingredients in the anti-freckle cream, and helps reduce pigmentation.

[0079] Angelica dahurica, Bletilla striata, Atractylodes macrocephala: These ingredients combined together can gently condition the skin, have whitening and anti-inflammatory effects, and help reduce inflammation and pigmentation on the skin.

[0080] Bupleurum: It has the effects of soothing the liver and relieving depression, clearing away heat and detoxifying, helping to eliminate pigmentation and enhance skin immunity.

[0081] Pearl powder: widely used in whitening and improving skin quality. Its mineral components can gently remove aging cuticles, making the skin smoother and more delicate.

[0082] The combination of these Chinese medicinal materials can comprehensively exert multiple functions, not only targeting the formation and deposition of pigmentation, but also fundamentally regulating skin health and solving the problem that the effects of existing freckle removal products weaken after long-term use.

[0083] Basic ingredient group

[0084] The base ingredient group includes deionized water and honey, the selection and use of these ingredients can enhance the mildness and moisturizing properties of the product.

[0085] Deionized water: As a matrix solvent, deionized water is high-purity and free of impurities, which avoids the influence of ions and impurities in ordinary water on the ingredients of traditional Chinese medicine and ensures the safety and stability of the freckle cream.

[0086] Honey: Honey has natural moisturizing and antioxidant effects, which can enhance the moisturizing effect of the freckle cream and prevent the skin from drying out during use. At the same time, honey can also promote skin regeneration and repair, help repair the skin of the freckle area, and enhance the freckle removal effect;

[0087] Through the combination of the basic ingredient group, the freckle removing cream of the present invention can effectively remove freckles while avoiding discomfort caused by dry skin or external stimulation, thereby further improving the user experience of the product.

[0088] Auxiliary ingredient group

[0089] The auxiliary ingredient group is composed of glycerin, almond oil and liquid paraffin. These ingredients not only improve the moisturizing effect of the product, but also enhance the permeability and stability of the freckle cream.

[0090] Glycerin: As a common moisturizer, glycerin can effectively absorb moisture from the air, provide continuous hydration to the skin, and prevent dry skin during the freckle removal process. The presence of glycerin also improves the lubricity of the paste, making the product easy to apply and absorb.

[0091] Almond oil: Rich in vitamin E and a variety of unsaturated fatty acids, it has good permeability and can help Chinese herbal ingredients better penetrate the skin barrier and play a role in removing spots. At the same time, the antioxidant effect of almond oil can extend the shelf life of the product and reduce the risk of oxidation and deterioration of natural ingredients.

[0092] Liquid paraffin: As a closed moisturizer, liquid paraffin forms a protective film on the skin surface to prevent moisture loss, increase the stability of the freckle cream, and ensure the long-term effect of the active ingredients.

[0093] The design of this auxiliary ingredient group not only enhances the efficacy of the freckle cream, but also solves the deficiencies of natural ingredient products in terms of permeability and stability, ensuring the long-term effectiveness and safety of the product.

[0094] Ingredients Ratio

[0095] The ratio of each component in the present invention is scientifically designed to ensure that the synergistic effect between the components achieves the best effect. The specific weight ratio of the Chinese medicine powder group ensures that the product has significant whitening and repairing effects while gently removing spots. The specific contents of the basic component group and the auxiliary component group ensure the physical properties and skin compatibility of the product, and enhance the comfort and effectiveness of use.

[0096] Through these precise proportions, the freckle removing cream of the present invention can not only effectively solve the problems of unstable efficacy and strong irritation of freckle removing products mentioned in the background technology, but also provide a long-lasting freckle removing effect, and is suitable for users of various skin types.

[0097] The specific composition ratio is: 30g of Radix Rehmanniae Preparata, 20g of Licorice, 20g of Radix Rehmanniae, 20g of Folium Mori, 20g of Rhizoma Cyperi, 20g of Angelica Dahurica, 20g of Bletilla striata, 20g of Atractylodes macrocephala, 20g of Radix Bupleuri, 20g of Pearl Powder; Basic ingredient group: 500ml of deionized water, 15g of honey;

[0098] Auxiliary ingredient group: glycerin 10ml, almond oil 30ml, liquid paraffin 10ml.

[0099] The present invention discloses a novel method for preparing a freckle cream, which ensures the high efficiency and stability of the freckle cream through a rationally designed and optimized preparation process. The operation details of each step and its role in solving the background technology problem will be described in detail below.

[0100] S1. Preparation of Chinese medicine powder

[0101] S11. Raw material selection:

[0102] In this step, Radix Rehmanniae Preparata, Radix Glycyrrhizae, Radix Rehmanniae, Folium Mori, Rhizoma Cyperi, Radix Angelicae Dahuricae, Rhizoma Bletillae, Rhizoma Atractylodis Macrocephalae, Radix Bupleuri are selected as Chinese herbal medicines. The selection of these Chinese herbal medicines is based on their wide application in traditional Chinese medicine and their significant effects on skin care. The appropriate concentration of each component in the final product is ensured to achieve their synergistic effect. For example, the ratio of Radix Rehmanniae Preparata and Radix Glycyrrhizae helps to nourish the skin and fight inflammation, while Radix Angelicae Dahuricae and Folium Mori are mainly used for whitening and inhibiting melanin production. Through reasonable ratios, the best efficacy of each component in the freckle cream is ensured.

[0103] S12, cleaning and drying:

[0104] The selected Chinese herbal medicines need to be cleaned and dried before use. The purpose of cleaning is to remove dust, impurities and other contaminants on the surface of the herbal medicines to ensure the purity and safety of the product. The drying process is carried out in an environment of 40-60℃ and lasts for 6-8 hours. The purpose is to reduce the moisture content of the herbal medicines and prevent them from getting damp and agglomerating during subsequent crushing. Appropriate drying conditions not only help to maintain the active ingredients of the Chinese herbal medicines, but also improve the quality of the powder after crushing and ensure uniform particle size.

[0105] S13, crushing and screening:

[0106] The dried Chinese herbal medicine is crushed and the particle size is controlled between 80-100 mesh. This particle size range is selected to ensure the fineness of the powder so that it can be evenly distributed and fully exert its effect during the subsequent mixing and preparation process. The crushed powder needs to be sieved through a sieve to remove coarse particles and ensure the uniformity and stability of the final powder.

[0107] S14, evenly mixed:

[0108] The sieved Chinese medicine powder is mixed evenly according to the proportion, and stirred with a low-speed mixer for 10-15 minutes to ensure that the ingredients are fully and evenly distributed. The key to this step is to ensure that the proportion of each Chinese medicine ingredient in each batch of freckle cream is consistent, thereby ensuring the effectiveness and stability of the product. Even mixing can also prevent the problem of local concentration being too high or too low due to uneven distribution of certain ingredients.

[0109] S2. Decoction of Chinese medicine

[0110] S21, add water to soak:

[0111] Before decoction, the mixed Chinese medicine powder needs to be added to 500ml of deionized water and soaked for 30 minutes. The purpose of this step is to allow the medicinal materials to fully absorb water and soften the fibrous tissue, which will help to better extract the effective ingredients during the subsequent decoction process. The use of deionized water ensures the purity of the solution and avoids the influence of impurities in the water on the medicinal ingredients.

[0112] S22, decoction process:

[0113] Put the soaked Chinese medicine mixture into a frying pan, boil it over high heat, then turn to low heat and continue to boil for 30-40 minutes until the liquid medicine is concentrated to about 60ml. The purpose of this process is to promote the release and concentration of active ingredients through heating. Intermittent stirring (once every 10 minutes) helps to heat evenly and prevent the herbs from sticking to the pan or uneven boiling. After the decoction is completed, the concentration of active ingredients in the liquid medicine reaches the optimal state, ready for the subsequent steps.

[0114] S23, Filtration and Cooling:

[0115] The decoction needs to be filtered three times through multiple layers of gauze to remove the residue and ensure the purity of the liquid. The filtered Chinese medicine juice needs to be naturally cooled to room temperature (about 25-30°C) to maintain the stability of the active ingredients. Temperature control during the cooling process is very critical. Too high a temperature may cause the degradation of certain heat-sensitive ingredients, while too low a temperature may affect the subsequent mixing process.

[0116] S3. Paste preparation

[0117] S31, paste preparation:

[0118] Mix the cooled Chinese medicine juice with 20g pearl powder and 15g honey, and stir at a low speed for 10-15 minutes with a blender until a uniform paste is formed. The speed during the stirring process is controlled at a low range (to avoid bubbles) to ensure that the Chinese medicine juice is fully integrated with the pearl powder and honey. The key to this step is to maintain the uniformity of the paste and ensure that the final paste has good spreadability and absorption effect.

[0119] S32, oil phase preparation:

[0120] Place 10ml of glycerin, 30ml of almond oil and 10ml of liquid paraffin in a water-insulated heating device and slowly heat to 70-80°C until all the oil phase components are completely melted to form a uniform oil phase mixture. Temperature control in this step is very important. Too low a temperature may cause uneven mixing of the oil phase components, while too high a temperature may cause oxidation or deterioration of some components. Appropriate temperature control can ensure uniform mixing and stability between the oil phase components.

[0121] S4, Mixing and Forming

[0122] S41, oil phase and water phase mixing:

[0123] Heat the prepared oil phase and water phase to 90°C respectively, then slowly add the oil phase to the water phase and stir at 800-1000rpm with a high-speed stirrer for 20-30 minutes. This stirring process ensures the full fusion of the oil phase and the water phase, forming a stable emulsified system and avoiding the occurrence of stratification. By gradually reducing the stirring speed, the generation of bubbles during the mixing process can be reduced, ensuring the smoothness and fineness of the final paste.

[0124] S42, cooling and molding:

[0125] During the cooling process of the mixture from water, continue to stir manually, and the cooling temperature should be controlled between 25-30℃. When the mixture is cooled to a paste, put it into a pre-sterilized container and seal it for storage. Temperature control and continuous stirring during the cooling process can ensure the uniformity of the paste and avoid stratification and particle aggregation. The cooled paste should have moderate viscosity and good ductility for easy use and application.

[0126] Through the above preparation method, the freckle cream of the present invention has excellent physical and chemical stability while maintaining the active ingredients of traditional Chinese medicine, and can effectively solve the deficiencies of existing freckle removal products in terms of efficacy and user experience. The method is simple and easy to implement, suitable for large-scale production, stable product quality, and significant effect.

[0127] In order to maintain the activity and quality stability of the powder, the pulverization process should be carried out under low humidity conditions of 30%-50%.

[0128] Importance of low humidity: In an environment with high humidity, Chinese herbal medicines tend to absorb moisture from the air during the pulverization process, causing the powder to clump, which not only affects the uniformity of the powder, but may also reduce the stability of the active ingredients. By pulverizing in a low humidity environment, the powder can be effectively prevented from absorbing moisture and caking, keeping it dry and loose, thereby ensuring the fluidity and uniform mixing of the powder in the subsequent steps.

[0129] Immediate sieving and storage: The crushed powder should be sieved immediately to remove any coarse particles that do not reach the target particle size. Subsequently, the powder needs to be stored in a dry, sealed container. This step is particularly critical to prevent the powder from being exposed to moisture and oxidation caused by air, and to maintain the long-term stability of the powder. This operation ensures the activity and uniform distribution of the active ingredients in the final freckle cream, thereby ensuring the quality and effect of the product.

[0130] In the decoction step S22, the present invention adopts an intermittent stirring method, stirring is performed every 10 minutes, and the stirring speed is 100-150 rpm.

[0131] Advantages of intermittent stirring: Intermittent stirring can ensure that the medicinal liquid is heated evenly during the decoction process, preventing the medicinal materials from settling at the bottom of the pot and causing local overheating or burning. A moderate stirring speed (100-150rpm) not only helps prevent the precipitation of medicinal materials, but also promotes the full release of active ingredients, ensuring that the concentration effect of the medicinal liquid reaches the best state.

[0132] Necessity of immediate filtration: After decoction, the liquid medicine should be filtered immediately to prevent oxidation caused by prolonged exposure to air. Many active ingredients in Chinese medicine liquid are sensitive to oxygen, and prolonged exposure to air may cause degradation or reduced activity of the ingredients. By filtering the liquid medicine in time and sealing it for storage, the activity and efficacy of the liquid medicine can be maintained to the maximum extent, providing high-quality Chinese medicine juice for subsequent paste preparation;

[0133] In the step of mixing the oil phase and the water phase in S41, the present invention pays special attention to the control of the temperature and stirring speed during the mixing process.

[0134] Necessity of preheating: Before mixing, the oil phase and the water phase are heated to nearly 90°C. This preheating operation can reduce the viscosity difference between the two phases and promote uniform fusion during the mixing process. Mixing at a constant temperature further ensures the stability of the water and oil phases and avoids the influence of temperature fluctuations on the emulsification effect.

[0135] Advantages of gradually reducing the stirring speed: During the mixing process, the stirring speed is gradually reduced from 1000rpm to 500rpm. This process helps to reduce the bubbles generated during the mixing process and avoid the unevenness caused by bubbles in the paste. By gradually reducing the stirring speed, it can ensure the full fusion of the water and oil phases, while forming a stable paste structure, improving the smoothness and use experience of the product.

[0136] In the S42 cooling and molding step, the present invention ensures the uniformity and stability of the paste by cooling in a low temperature environment of 15-20° C. and manually stirring every 5 minutes.

[0137] Advantages of low temperature cooling: Cooling at a lower temperature (15-20°C) can slow down the solidification of the paste and avoid component separation or particle aggregation due to rapid cooling. The low temperature cooling environment helps maintain the uniformity of the paste and ensures that the components will not be separated during the cooling process.

[0138] Importance of manual stirring: Manual stirring every 5 minutes can effectively prevent unevenness or precipitation of the paste during the cooling process. Continuous stirring ensures uniform cooling of the paste and prevents surface crusting or precipitation of ingredients. After cooling, the paste should be immediately sealed in a sterilized container and stored in a dark environment to maintain its long-term stability and activity.

[0139] These optimized steps not only ensure the high quality and consistency of the freckle cream, but also significantly improve the stability and use effect of the product, and solve the problems of permeability, stability and durability of the freckle cream mentioned in the background technology.

[0140] The present invention provides a novel application method of freckle removal cream, which maximizes the efficacy of freckle removal cream through scientific application steps, and achieves the purpose of gently and effectively caring for and treating skin freckles. The following is a detailed description of the application method:

[0141] a) Skin cleansing

[0142] Before using the freckle cream, you first need to clean your skin. This step is very important because only on clean skin can the active ingredients in the freckle cream fully work.

[0143] pH value control: Choose a mild cleansing product with a pH value between 5.5-6.5 for cleansing. This range is close to the natural pH of the skin and can effectively clean the oil and dirt on the skin surface without destroying the skin's barrier function and avoiding additional irritation to the skin.

[0144] Cleaning time: The cleaning time should be controlled within 1-2 minutes, which can ensure thorough cleaning without causing skin dryness or sensitivity due to excessive cleaning. This operation ensures that the freckle cream can be evenly applied and fully absorbed in the subsequent steps.

[0145] b) Application and massage of anti-freckle cream

[0146] After cleansing the skin, the next step is to apply and massage the anti-freckle cream, which is a key operation to ensure that the effective ingredients penetrate deep into the skin.

[0147] Application amount and area: Take 0.5-1.0 grams of the new freckle cream and apply it evenly to the skin of the freckle area. The application area should be controlled within 1-2 square centimeters. This setting of dosage and area ensures that each freckle area can be adequately covered by the drug, while avoiding waste or skin burden caused by excessive application.

[0148] Massage intensity and time: Gently massage for 3-5 minutes, the massage intensity should be controlled at 100-150g / cm 2 This intensity range can promote the penetration of active ingredients without causing mechanical damage to the skin. The massage time is designed to be 3-5 minutes, which can effectively increase the microcirculation of the skin and help the active ingredients in the freckle cream to enter the skin faster and deeper.

[0149] c) Frequency of use and dosage adjustment

[0150] In order to maximize the freckle removal effect, the present invention recommends using it once in the morning and evening each day, and adjusting the dosage according to the time and effect.

[0151] Frequency of use: Use once in the morning and evening, with an interval of 12 hours between two uses. This frequency setting helps maintain the concentration of active ingredients on the skin surface and ensures all-day freckle removal effects.

[0152] Nighttime dosage adjustment: When used at night, increase the dosage by 0.5 grams appropriately. This increase in dosage can provide more active ingredients during the peak period of skin repair at night, enhance the freckle removal effect, and avoid the influence of daytime light on the ingredients.

[0153] d) Treatment management

[0154] The use of freckle cream should be carried out according to the course of treatment to achieve the best effect within a safe range.

[0155] Treatment setting: 30 days of continuous use is a course of treatment. After each course of treatment, it is recommended to evaluate whether to continue using it based on skin condition. The interval after each course of treatment is 7 days. This design can ensure the efficacy and avoid skin tolerance due to long-term use.

[0156] Maximum number of treatment courses: It is recommended to use up to 3 courses in a row. More than 3 courses may increase the burden on the skin, so it is recommended to use it further under the guidance of a professional doctor. This setting can prevent side effects caused by excessive use, while ensuring that the skin can fully absorb the active ingredients in the freckle cream in each course of treatment.

[0157] e) Use with moisturizing products

[0158] During the use of freckle cream, it is recommended to use moisturizing products to maintain the skin's moisture and barrier function.

[0159] Choice of moisturizing products: It is recommended to use moisturizing products with a water content of 50%-70%. Such products can provide moderate moisture to the skin while avoiding damage to the skin barrier function caused by excessive moisturizing. By maintaining the moisture balance of the skin, the effect of the freckle cream can be improved and the formation of secondary spots caused by dry skin can be prevented.

[0160] Frequency of use: The frequency of use of moisturizing products is 2-3 times a day. This frequency can ensure that the skin maintains a good moisture level during the use of the freckle cream, avoiding damage to the skin barrier and worsening of spots due to dryness.

[0161] Example 1: Application of the novel freckle cream in patients with moderate pigmentation

[0162] Background and technical purpose

[0163] Patients with moderate pigmentation usually have more obvious pigmentation, larger coverage area and darker color. Such patients often need long-term and stable treatment to alleviate the pigmentation problem. However, traditional pigmentation removal products may have weakened effects or rebound problems after long-term use. The purpose of this example is to verify the effect of the new pigmentation removal cream of the present invention on patients with moderate pigmentation and evaluate its long-term effect and stability.

[0164] This example demonstrates the advantages of the present invention in the treatment of moderate pigmentation by using natural Chinese medicinal materials in combination with scientific compatibility and preparation technology. In particular, in terms of stable improvement of pigmentation, the present invention can significantly reduce the risk of rebound and is suitable for patients who need long-term care.

[0165] Specific implementation steps

[0166] Subject selection: 50 patients with moderate pigmentation, aged between 30 and 50 years old, without other serious skin problems, were selected and randomly divided into two groups: the present invention group (25 subjects) and the control group (25 subjects).

[0167] Use of freckle cream:

[0168] The present invention group: uses the novel freckle removing cream of the present invention, applies it according to the steps in claim 10, and uses it continuously for 30 days as a course of treatment.

[0169] Control group: Use the common hydroquinone freckle cream on the market according to the requirements of the product instructions, and use it continuously for 30 days as a course of treatment.

[0170] Efficacy evaluation: After each course of treatment, a skin densitometer and a spot area meter are used for evaluation to record the density, area, color changes of the spots and the improvement of skin condition.

[0171] Performance evaluation:

[0172] Spot density improvement rate: Measures the change in optical density of the spot area.

[0173] Spot area reduction rate: record the changes in the spot area.

[0174] Improved Skin Evenness: Use the Skin Tone Analyzer to assess changes in the overall evenness of your skin.

[0175] Pigmentation rebound rate: After the last course of treatment, observe the rebound of pigmentation within 3 months after stopping the use of the anti-freckle cream.

[0176] Safety of use: Record any skin irritation reactions experienced by the subjects during use, such as redness, swelling, itching, etc.

[0177] User satisfaction: The user experience and satisfaction scores of the subjects are collected through questionnaires.

[0178] Experimental Results

[0179]

[0180]

[0181] The experimental results show that the application effect of the novel freckle cream of the present invention on patients with moderate pigmentation is significantly better than that of the traditional hydroquinone-containing freckle cream. Not only is the freckle removal effect more durable, but the skin irritation is also lower, and the pigmentation rebound rate is also significantly reduced. In addition, the users of the present invention group have a higher satisfaction score for the product, which is suitable for medium and long-term use.

[0182] Example 2: Application of the novel freckle cream in patients with mild freckles and sensitive skin

[0183] Background and technical purpose

[0184] Patients with mild pigmentation usually have lighter pigmentation, smaller distribution range, and may have sensitive skin problems. Such patients have higher requirements for the mildness of freckle removal products. Traditional freckle removal products are often not suitable for long-term use due to their high irritation. This example aims to evaluate the effect of the novel freckle removal cream of the present invention on patients with mild pigmentation and sensitive skin, with particular attention to its mildness and safety.

[0185] This example demonstrates the advantages of the present invention in the application on sensitive skin through the mild natural ingredients, which is particularly suitable for patients who need gentle care and avoid skin sensitivity problems caused by the use of traditional freckle removal products.

[0186] Specific implementation steps

[0187] Subject selection: 50 patients with mild pigmentation and sensitive skin, aged between 25 and 45 years old, were selected and randomly divided into two groups: the present invention group (25 subjects) and the control group (25 subjects).

[0188] Use of freckle cream:

[0189] The present invention group: uses the novel freckle removing cream of the present invention, applies it according to the steps in claim 10, and uses it continuously for 30 days as a course of treatment.

[0190] Control group: Use the mild plant extract freckle cream on the market according to the product instructions, and use it continuously for 30 days as a course of treatment.

[0191] Efficacy evaluation: After each course of treatment, a skin densitometer and a spot area meter were used to evaluate the spots and record the density, area, color change, skin comfort and sensitive reaction.

[0192] Performance evaluation:

[0193] Spot density improvement rate: Measures the change in optical density of the spot area.

[0194] Spot area reduction rate: record the changes in the spot area.

[0195] Skin comfort score: The comfort level during use was assessed through a questionnaire survey of the subjects, with a score range of 1-10.

[0196] Skin allergy reaction (example): Record any skin allergy reaction that occurs during use.

[0197] Skin Tone Evenness: Use the Skin Tone Analyzer to assess changes in the overall evenness of your skin.

[0198] Moisturizing effect: Evaluate the changes in skin moisture after using the anti-freckle cream, and measure it using a skin moisture tester.

[0199] Experimental Results

[0200]

[0201] The experimental results show that the application effect of the novel freckle cream of the present invention on patients with mild pigmentation and sensitive skin is significantly better than that of the traditional plant extract freckle cream. It is not only superior in freckle removal effect, but also more comfortable on the skin and has no allergic reaction. In addition, the uniformity of skin color and moisturizing effect are also significantly improved, which is suitable for long-term use by people with sensitive skin.

[0202] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of freckle cream, characterized by: Includes the following components Chinese medicine powder group: Radix Rehmanniae Preparata, Radix Glycyrrhizae, Radix Rehmanniae, Folium Mori, Rhizoma Cyperi, Radix Angelicae Dahuricae, Rhizoma Bletillae, Rhizoma Atractylodis Macrocephalae, Radix Bupleuri, Pearl powder; Basic ingredient group: deionized water, honey; Auxiliary ingredient group: glycerin, almond oil, liquid paraffin.

2. A novel freckle removing cream according to claim 1, characterized in that: The weight ranges of the ingredients in the Chinese medicine powder set are as follows: Rehmannia root: 20-40g, Licorice root: 10-30g, Rehmannia root: 10-30g, Mulberry leaf: 10-30g, Cyperus rotundus: 10-30g, Angelica dahurica: 10-30g, Bletilla striata: 10-30g, Atractylodes macrocephala: 10-30g, Bupleurum root: 10-30g, Pearl powder: 10-30g.

3. A novel freckle removing cream according to claim 2, characterized in that: The specific weight dosage of the Chinese medicine powder group is 30g of Rehmannia root, 20g of Licorice root, 20g of Rehmannia root, 20g of Mulberry leaf, 20g of Cyperus rotundus, 20g of Angelica dahurica, 20g of Bletilla striata, 20g of Atractylodes macrocephala, 20g of Bupleurum chinense, and 20g of pearl powder.

4. A novel freckle removing cream according to claim 1, characterized in that: The specific contents of the basic component group and the auxiliary component group are as follows Basic ingredient group: deionized water 500ml, honey 15g; Auxiliary ingredient group: glycerin 10ml, almond oil 30ml, liquid paraffin 10ml.

5. A method for preparing a novel freckle cream, applied to the novel freckle cream according to any one of claims 1 to 5, characterized in that: The following steps are included S1. Preparation of Chinese medicine powder S11. Raw material selection: Select Radix Rehmanniae Preparata, Radix Glycyrrhizae, Radix Rehmanniae, Folium Mori, Rhizoma Cyperi, Radix Angelicae Dahuricae, Rhizoma Bletillae, Rhizoma Atractylodis Macrocephalae, Radix Bupleuri as Chinese medicinal materials, and mix them according to weight ratio; S12, cleaning and drying: The selected Chinese medicinal materials are preliminarily cleaned to remove surface impurities and dust, and then dried in a ventilated and dry environment; the drying temperature is controlled between 40-60°C and the drying time is 6-8 hours to ensure that the Chinese medicinal materials reach an appropriate moisture content and avoid moisture and agglomeration during the crushing process; S13, crushing and screening: The dried Chinese medicinal materials are put into a grinder for crushing, and the crushed particle size is controlled between 80-100 meshes; after crushing, they are sieved through a sieve to remove coarse particles to ensure uniform fine powder; S14, evenly mixed: Mix all the sieved Chinese medicine powders evenly according to the proportions, use a low-speed mixer to mix for 10-15 minutes to ensure that all ingredients are fully and evenly distributed; S2. Decoction of Chinese medicine S21, add water to soak: Add the mixed Chinese medicine powder into 500 ml of deionized water and let it soak for 30 minutes so that the medicinal materials can fully absorb water and facilitate the extraction of effective ingredients in the subsequent decoction process; S22, decoction process: Put the soaked Chinese medicine mixture into a frying pan, boil it over high heat, then turn to low heat and continue decocting after boiling; the decocting time is 30-40 minutes, until the medicinal liquid is concentrated to about 60ml; S23, Filtration and Cooling: After the decoction is completed, the medicinal liquid is filtered through multiple layers of gauze three times to remove the medicinal residues to obtain a clear Chinese medicinal juice; the Chinese medicinal juice is then naturally cooled to room temperature for use; S3. Paste preparation S31, paste preparation: Mix the cooled Chinese medicine juice with 20g pearl powder and 15g honey, and stir at low speed for 10-15 minutes with a blender until a uniform paste is formed; control the speed during the stirring process to avoid bubbles; S32, oil phase preparation: Add 10 ml of glycerin, 30 ml of almond oil and 10 ml of liquid paraffin into a water-insulated heating device, and slowly heat to 70-80°C until all the oil phase components are completely melted to form a uniform oil phase mixture; S4, Mixing and Forming S41, oil phase and water phase mixing: Heat the prepared oil phase and water phase to 90°C respectively, then slowly add the oil phase to the water phase, and stir with a high-speed stirrer at a speed of 800-1000rpm for 20-30 minutes to ensure that the water and oil phases are fully blended without stratification; S42, cooling and molding: After stirring is completed, the mixture is removed from water and cooled, and stirring is continued during the cooling process to maintain uniformity; the cooling temperature should be controlled at 25-30°C; when the mixture is cooled to a paste, it is placed in a pre-sterilized container and sealed for storage.

6. A method for preparing a novel freckle removing cream according to claim 5, characterized in that: In the S13 pulverizing step, the pulverizing environment is maintained at a low humidity of 30%-50%, the pulverized powder is immediately sieved, and the powder is stored in a dry and sealed container.

7. A method for preparing a novel freckle removing cream according to claim 5, characterized in that: In the decoction step S22, intermittent stirring is adopted, stirring is performed every 10 minutes, the stirring speed is 100-150 rpm, and filtering is performed immediately after decoction is completed.

8. The method for preparing a novel freckle removing cream according to claim 5, characterized in that: In the step of mixing the oil phase and the water phase in S41, the oil phase and the water phase are heated to approximately 90° C. before mixing, and mixed at a constant temperature. During the mixing process, the stirring speed is gradually reduced from 1000 rpm to 500 rpm.

9. A method for preparing a novel freckle removing cream according to claim 5, characterized in that: In the cooling and molding step S42, the mixture is cooled in a low temperature environment of 15-20° C. when it is separated from water, and is manually stirred every 5 minutes until the paste is completely cooled; after the cooling is completed, the paste is immediately filled into a sterilized container and sealed.

10. An application of the novel freckle removing cream according to any one of claims 1 to 4, characterized in that: The novel freckle cream obtained by the novel freckle cream preparation method according to any one of claims 5 to 9 is applied to the care and treatment of skin freckles, comprising the following steps: a) Before using the freckle cream, use a mild cleanser with a pH value between 5.5-6.5 to cleanse your facial skin, ensuring that there is no grease and dirt on the skin surface. The cleaning time is 1-2 minutes; b) Take 0.5-1.0g of the new freckle cream and apply it evenly to the skin of the freckle area, with an application area of ​​1-2 square centimeters, and gently massage for 3-5 minutes to promote the penetration of the active ingredients. The massage intensity is 100-150g / cm 2 ; c) Use once in the morning and evening every day, with an interval of 12 hours between each use. When used at night, increase the dosage by 0.5 grams to enhance the freckle removal effect; d) Continuous use for 30 days is a course of treatment. After each course of treatment, the skin condition should be evaluated to determine whether to continue using the product. It is recommended that the product be used for a maximum of 3 courses of treatment, with an interval of 7 days between each course of treatment. e) While using the freckle cream, use moisturizing products with a water content of 50%-70% to maintain skin moisture and prevent dryness. The frequency of use of moisturizing products is 2-3 times a day.

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