External application oil-controlling and acne-removing composition and preparation method thereof

Abstract

The present invention relates to an acne-removing composition, and in particular to an externally applied oil-controlling acne-removing composition and a preparation method thereof, wherein the oil-controlling acne-removing composition is composed of the following components in percentage by mass: 8-20% Chinese herbal medicine extract, 0.5-2% vitamin B6, 1-3% chlorogenic acid, 5-10% ethanol, 0.5-5.5% moisturizer, 0.02-0.15% citric acid, 0.05-0.35% thickener, and the remainder is deionized water; the Chinese herbal medicine extract is made of He Ye Lian, Pu'er tea, palm leaf rhubarb and kudzu root. The preparation method of the composition is to add Chinese herbal medicine extract, vitamin B6, moisturizer, and citric acid to deionized water and mix them evenly; chlorogenic acid is added to ethanol and stirred to dissolve, and then the two are fully mixed, and then a thickener is added and stirred evenly. The oil-controlling acne-removing composition of the present invention uses natural Chinese herbal medicine extract as the main raw material, has multiple effects such as oil control, acne removal, and soothing, and is safe and has no side effects.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-controlling and anti-acne compositions, and more specifically, to an externally applied oil-controlling and anti-acne composition, and also to a method for preparing the composition. Background Art

[0002] With the accelerated pace of life and the increase of social pressure, oily skin and acne problems have become important factors affecting people's beauty and quality of life. At present, there are many kinds of oil control and acne removal products on the market, but the effects are uneven, and most products contain a lot of chemical additives, which themselves have certain side effects on human skin. Some products even use hormones and antibiotics. Although the effect is obvious in the short term, it is easy to relapse.

[0003] There are also some natural combination acne removal products, but most of them only use one natural extract as the main ingredient to remove acne, and the effect is often unsatisfactory. Therefore, it is of great significance to develop a safe, effective, and side-effect-free oil control and acne removal composition. Summary of the invention

[0004] In view of the above technical problems, the first object of the present invention is to provide an external oil-controlling and acne-removing composition, which uses natural Chinese medicine extracts as the main raw materials and adds less chemical substances, has multiple functions such as oil control, acne removal, and soothing, and is safe and has no side effects. The oil-controlling and acne-removing composition can be added to a mask bag and mixed with a mask paper for use as a facial mask, or can be added with a gelling agent to make a gel mask or ointment for use.

[0005] The second object of the present invention is to provide a method for preparing an external oil-controlling and anti-acne composition, which is more conducive to retaining the effective ingredients in the raw materials, and the prepared facial mask or ointment has better therapeutic effect.

[0006] The first object of the present invention is achieved through the following technical scheme: an external oil-control and acne-removing composition, composed of the following components in mass percentage: 8-20% of Chinese herbal extract, 0.5-2% of vitamin B6, 1-3% of chlorogenic acid, 5-10% of ethanol, 0.5-5.5% of moisturizer, 0.02-0.15% of citric acid, 0.05-0.35% of thickener, and the balance is deionized water; the Chinese herbal extract is made of Hemp Leaf Lotus, Pu'er Tea, Palm Leaf Rhubarb and Pueraria lobata.

[0007] Furthermore, the Chinese medicine extract is prepared from 15-30 parts of Helianthus annuus, 30-65 parts of Pu'er tea, 50-75 parts of Rheum palmatum and 40-70 parts of Pueraria root in terms of mass proportions.

[0008] Furthermore, the Chinese medicine extract is prepared from 20-25 parts of Helianthus annuus, 40-60 parts of Pu'er tea, 55-65 parts of Rheum palmatum and 45-60 parts of Pueraria root in terms of mass proportions.

[0009] Furthermore, the moisturizing agent is sodium hyaluronate.

[0010] Furthermore, the mass percentage of the citric acid is 0.02-0.1%.

[0011] The second object of the present invention is achieved by the following technical solution: The preparation method of the above-mentioned external oil-controlling and acne-removing composition comprises the following steps:

[0012] (1) Crush the dried lotus leaf, Pu'er tea, palm leaf rhubarb and kudzu root respectively and set aside;

[0013] (2) adding Pu'er tea to a citric acid solution, soaking it at a temperature of 80-90°C, and then filtering it; soaking the residue in 80-90°C distilled water and filtering it; repeating this process twice, and combining the three filtrates;

[0014] (3) mixing other crushed materials, adding them into an ethanol solvent for immersion, ultrasonically extracting them at 40-50° C. for 30-60 min, and filtering to obtain an extract;

[0015] (4) combining the filtrate obtained in step (2) and the extract obtained in step (3), evaporating the solvent, and obtaining a Chinese medicine extract;

[0016] (5) Add the Chinese herbal extract, vitamin B6, moisturizer, and citric acid to deionized water according to the formula amount and mix evenly; add chlorogenic acid to ethanol and stir to dissolve, then mix the two thoroughly, and then add the thickener and stir evenly.

[0017] Furthermore, in the step (1), the lotus leaves, Pu'er tea, palm rhubarb and kudzu root are crushed into 20-30 meshes.

[0018] Furthermore, in step (2), the first heat preservation and soaking time is 35-45 minutes; and the subsequent two heat preservation and soaking time is 25-35 minutes.

[0019] Furthermore, in the step (3), the material-liquid ratio of the pulverized material to the solvent is 1:20-35 g / L.

[0020] Furthermore, the frequency of ultrasonic extraction in step (3) is 20-40 kHz.

[0021] Furthermore, in step (3), the ultrasonic extraction time is 24-60 minutes.

[0022] Furthermore, the evaporation method in step (4) is rotary evaporation.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The oil-controlling and acne-removing composition for external application of the present invention adopts natural Chinese medicine extracts as the main raw materials and adds less chemical substances. It has multiple functions such as oil control, acne removal, soothing, etc. and is safe and has no side effects.

[0025] 2. The oil-controlling and acne-removing composition of the present invention contains Rheum palmatum extract, whose main components include aloe-emodin, chrysophanol and rhein, etc. It has a convergence effect, helps reduce the secretion of skin oil, is a good skin lipid inhibitor, and also has antioxidant and anti-inflammatory effects, protecting the skin from damage by free radicals.

[0026] Pu'er tea extract mainly contains tea polyphenols, theanine, vitamin C and minerals such as zinc, calcium, and magnesium. Tea polyphenols can reduce skin inflammation and have a soothing and helpful effect on acne or other pimples. Theanine and minerals work together to maintain the moisture balance of the skin and repair damaged areas. Vitamin C is a natural antioxidant and works together with other antioxidants to have excellent antioxidant and free radical scavenging capabilities.

[0027] Pueraria extract, whose ingredients include isoflavone compounds, soy flavonoids, puerarin, soy flavonoid glycosides, etc., is the main active ingredient isolated and extracted from Pueraria. It has anti-inflammatory, antibacterial, skin soothing, wound healing and anti-inflammatory and analgesic functions, and is suitable for sensitive skin.

[0028] The extract of Hemp Leaf Lotus mainly contains alkaloids, flavonoids and phenolic acid compounds, which have excellent antibacterial effects, can inhibit the growth of various bacteria, and prevent infection of broken or damaged skin. In addition, the extract of Hemp Leaf Lotus can repair damaged cells, enhance skin permeability, and promote skin absorption capacity, thereby increasing the absorption effect of other Chinese medicine extracts.

[0029] Vitamin B6 works by participating in the metabolism of sugar, protein and fat, thereby inhibiting the secretion of oil from the skin. However, the effect of vitamin B6 used alone is slight, and it needs to work together with Rhubarb palmatum extract to quickly inhibit oil secretion.

[0030] Sodium hyaluronate is a natural moisturizing ingredient with a good moisturizing effect. Adding hyaluronic acid to the composition of the present invention can play a moisturizing and lubricating role, making the care product prepared by the present invention more comfortable to use.

[0031] The addition of citric acid, on the one hand, acts as a neutralizer to neutralize the alkalinity of the composition so that it reaches a pH range suitable for use on human skin; on the other hand, it acts as a moisturizer together with sodium hyaluronate to improve and replicate the skin condition.

[0032] Chlorogenic acid is used as an antioxidant in the present invention to eliminate free radicals on the skin surface, protect damaged skin, and prevent infection, and plays a vital role in the treatment of acne.

[0033] The combination of these medicines can achieve the effects of controlling oil, removing acne and repairing acne scars.

[0034] 3. The preparation method of the oil-controlling and anti-acne composition of the present invention is carried out with appropriate extraction method, time and temperature, which is more conducive to retaining the effective ingredients of the drug, has a simple preparation method and better efficacy.

[0035] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with embodiments so that those skilled in the art can implement the invention with reference to the description.

[0037] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified.

[0038] <Example 1>

[0039] 150g of dried lotus leaf, 300g of Pu'er tea, 500g of palm leaf rhubarb and 400g of kudzu root are crushed to 20-30 mesh respectively, Pu'er tea powder is added to citric acid solution, soaked at 80-90℃ for 20 minutes and filtered, the filter residue is soaked in 3-5 times volume of distilled water at 80-90℃ for 25 minutes and filtered, repeated twice, and the three filtrates are combined. Other crushed materials are mixed, added to an ethanol solvent with a concentration of 35% and a solid-liquid ratio of 1:25g / mL and soaked so that the crushed materials can fully contact with the solvent, ultrasonically extracted at 40-50℃ for 30-60min, the frequency of ultrasonic extraction is 20-40kHz, and then filtered to obtain an extract. The extract is combined with the filtrate of extracting Pu'er tea, and the solvent is rotary evaporated to obtain a Chinese medicine extract.

[0040] According to the formula: 8% of Chinese herbal extract, 2% of vitamin B6, 0.5% of sodium hyaluronate, and 0.15% of citric acid are added to 83.3% of deionized water and mixed evenly; 1% of chlorogenic acid is added to 5% of ethanol and stirred to dissolve, and then the two are fully mixed, and then 0.05% of thickener is added and stirred evenly to obtain an oil-controlling and anti-acne composition.

[0041] <Example 2>

[0042] 300g of dried lotus leaf, 650g of Pu'er tea, 750g of palm leaf rhubarb and 700g of kudzu root are crushed to 20-30 mesh respectively, Pu'er tea powder is added to citric acid solution, soaked at 80-90℃ for 20 minutes and filtered, the filter residue is soaked in 3-5 times volume of distilled water at 80-90℃ for 25 minutes and filtered, repeated twice, and the three filtrates are combined. Other crushed materials are mixed, added to an ethanol solvent with a concentration of 35% and a solid-liquid ratio of 1:40g / mL and soaked so that the crushed materials can fully contact with the solvent, ultrasonically extracted at 40-50℃ for 60min, the frequency of ultrasonic extraction is 40kHz, and then filtered to obtain an extract. The extract is combined with the filtrate of extracting Pu'er tea, and the solvent is rotary evaporated to obtain a Chinese medicine extract.

[0043] According to the formula: 20% of traditional Chinese medicine extract, 0.5% of vitamin B6, 5.5% of sodium hyaluronate, and 0.02% of citric acid are added to 60.63% of deionized water and mixed evenly; 3% of chlorogenic acid is added to 10% of ethanol and stirred to dissolve, and then the two are fully mixed, and then 0.35% of thickener is added and stirred evenly to obtain an oil-controlling and anti-acne composition.

[0044] <Example 3>

[0045] 200g of dried lotus leaf, 400g of Pu'er tea, 550g of palm leaf rhubarb and 450g of kudzu root are crushed to 20-30 mesh respectively, Pu'er tea powder is added to citric acid solution, soaked at 80-90℃ for 20 minutes and filtered, the filter residue is soaked in 3-5 times volume of distilled water at 80-90℃ for 35 minutes and filtered, repeated twice, and the three filtrates are combined. Other crushed materials are mixed, added to an ethanol solvent with a concentration of 35% and a solid-liquid ratio of 1:25g / mL and soaked so that the crushed materials can fully contact with the solvent, ultrasonically extracted at 40-50℃ for 30min, the frequency of ultrasonic extraction is 20-40kHz, and then filtered to obtain an extract. The extract is combined with the filtrate of extracting Pu'er tea, and the solvent is rotary evaporated to obtain a Chinese medicine extract.

[0046] According to the formula: 20% of Chinese herbal extract, 0.5% of vitamin B6, 5.5% of sodium hyaluronate, and 0.1% of citric acid are added to 60.85% of deionized water and mixed evenly; 3% of chlorogenic acid is added to 10% of ethanol and stirred to dissolve, and then the two are fully mixed, and then 0.05% of thickener is added and stirred evenly to obtain an oil-controlling and anti-acne composition.

[0047] <Example 4>

[0048] 250g of dried lotus leaf, 600g of Pu'er tea, 650g of palm leaf rhubarb and 600g of kudzu root are crushed to 20-30 mesh respectively, Pu'er tea powder is added to citric acid solution, soaked at 80-90℃ for 20 minutes and filtered, the filter residue is soaked in 3-5 times volume of distilled water at 80-90℃ for 25 minutes and filtered, repeated twice, and the three filtrates are combined. Other crushed materials are mixed, added to an ethanol solvent with a concentration of 35% and a solid-liquid ratio of 1:40g / mL and soaked so that the crushed materials can fully contact with the solvent, ultrasonically extracted at 40-50℃ for 30-60min, the frequency of ultrasonic extraction is 20-40kHz, and then filtered to obtain an extract. The extract is combined with the filtrate of extracting Pu'er tea, and the solvent is rotary evaporated to obtain a Chinese medicine extract.

[0049] According to the formula: 10% of Chinese herbal extract, 1.5% of vitamin B6, 3% of sodium hyaluronate, and 0.15% of citric acid are added to 75.05% of deionized water and mixed evenly; 2% of chlorogenic acid is added to 8% of ethanol and stirred to dissolve, and then the two are fully mixed, and then 0.3% of thickener is added and stirred evenly to obtain an oil-controlling and anti-acne composition.

[0050] <Comparative Example 1>

[0051] 600g of dried Pu'er tea, 650g of palm leaf rhubarb and 600g of kudzu root were crushed into 20-30 meshes respectively, the Pu'er tea powder was added to a citric acid solution, and the mixture was kept warm and soaked at a temperature of 80-90°C for 20 minutes and then filtered, the filter residue was soaked in 3-5 times the volume of distilled water at 80-90°C for 25 minutes and then filtered, and the mixture was repeated twice, and the three filtrates were combined. The other crushed materials were mixed, added to an ethanol solvent with a concentration of 35% and a solid-liquid ratio of 1:40g / mL, and soaked so that the crushed materials and the solvent can be fully contacted, and ultrasonic extraction was performed at 40-50°C for 30-60min, and the frequency of ultrasonic extraction was 20-40kHz, and then filtered to obtain an extract. The extract was combined with the filtrate of extracting Pu'er tea, and the solvent was rotary evaporated to obtain a Chinese medicine extract.

[0052] According to the formula: 10% of Chinese herbal extract, 1.5% of vitamin B6, 3% of sodium hyaluronate, and 0.15% of citric acid are added to 75.05% of deionized water and mixed evenly; 2% of chlorogenic acid is added to 8% of ethanol and stirred to dissolve, and then the two are fully mixed, and then 0.3% of thickener is added and stirred evenly to obtain an oil-controlling and anti-acne composition.

[0053] <Comparative Example 2>

[0054] 650g of dried palm leaf rhubarb, 250g of hemp leaf lotus, 600g of Pu'er tea and 600g of kudzu root are crushed to 20-30 mesh respectively, Pu'er tea powder is added to citric acid solution, soaked at 80-90℃ for 20 minutes and filtered, the filter residue is soaked in 3-5 times volume of distilled water at 80-90℃ for 25 minutes and filtered, repeated twice, and the three filtrates are combined. Other crushed materials are mixed, added to an ethanol solvent with a concentration of 35% and a solid-liquid ratio of 1:40g / mL and soaked so that the crushed materials can fully contact with the solvent, ultrasonically extracted at 40-50℃ for 30-60min, the frequency of ultrasonic extraction is 20-40kHz, and then filtered to obtain an extract. The extract is combined with the filtrate of extracting Pu'er tea, and the solvent is rotary evaporated to obtain a Chinese medicine extract.

[0055] According to the formula: 10% of Chinese herbal extract, 1.5% of vitamin B6, 3% of sodium hyaluronate, and 0.15% of citric acid are added to 75.05% of deionized water and mixed evenly; 2% of chlorogenic acid is added to 8% of ethanol and stirred to dissolve, and then the two are fully mixed, and then 0.3% of thickener is added and stirred evenly to obtain an oil-controlling and anti-acne composition.

[0056] <Comparative Example 3>

[0057] 250g of dried lotus leaf, 600g of Pu'er tea and 600g of Pueraria root are crushed to 20-30 mesh respectively, Pu'er tea powder is added to citric acid solution, soaked at 80-90℃ for 20 minutes and filtered, the filter residue is soaked in 3-5 times volume of distilled water at 80-90℃ for 25 minutes and filtered, repeated twice, and the three filtrates are combined. Other crushed materials are mixed, added to an ethanol solvent with a concentration of 35% and a solid-liquid ratio of 1:40g / mL and soaked so that the crushed materials can fully contact with the solvent, ultrasonically extracted at 40-50℃ for 30-60min, the frequency of ultrasonic extraction is 20-40kHz, and then filtered to obtain an extract. The extract is combined with the filtrate of extracting Pu'er tea, and the solvent is rotary evaporated to obtain a Chinese medicine extract.

[0058] According to the formula: 10% of Chinese herbal extract, 3% of sodium hyaluronate, and 0.15% of citric acid are added to 76.55% of deionized water and mixed evenly; 2% of chlorogenic acid is added to 8% of ethanol and stirred to dissolve, and then the two are fully mixed, and then 0.3% of thickener is added and stirred evenly to obtain an oil-controlling and anti-acne composition.

[0059] In Examples 5 to 11, the oil-controlling and acne-removing compositions obtained in Examples 1 to 4 and Comparative Examples 1 to 3 are added into a mask bag containing mask paper and sealed to obtain an oil-controlling and acne-removing mask.

[0060] The physical and chemical indexes and microbiological indexes of the oil-controlling and anti-acne facial masks prepared in Examples 5 to 11 were tested. The results are shown in Tables 1 and 2.

[0061] Table 1

[0062] project index Lead (Pb) mg / kg ≦1.5 Total arsenic (as As) mg / kg ≦1.0 Mercury (Hg) mg / kg ≦0.3

[0063] Table 2

[0064]

[0065] The monitoring results show that the contents of heavy metals such as lead, total arsenic, and mercury, as well as various microbial indicators in the oil-controlling and anti-acne composition and facial mask provided by the present invention all meet the qualified standards.

[0066] Application Examples

[0067] The masks of Examples 5-11 above were tested. 84 subjects aged between 18 and 45 years old (both male and female) with skin problems such as acne, pimples, large pores, and oily shine were selected and well cooperated with the test. They were evenly distributed and divided into 7 groups, with 12 subjects in each group. During the study, the testers need to maintain a good life routine. The subjects were asked to use the prepared mask once every two days, and each application lasted 15-20 minutes. Follow-up visits were conducted at different time periods at the beginning of the experiment, and the skin oil control, hydration, visible acne changes and complications of the products were tested respectively. The test of the same volunteer was completed by the same measurement personnel.

[0068] Test standard:

[0069] (1) Determination of skin oil content: The cheeks and foreheads of the test subjects were used as test areas. The CBS skin analysis system was used to measure the skin oil content of each test subject before use and the skin oil content on the 14th day after using the sample in an environment of 25°C. The oil removal rate was calculated according to the following formula and the arithmetic mean was taken. The measurement results are shown in Table 3.

[0070]

[0071] Table 3 Grease removal rate test results

[0072]

[0073]

[0074] It can be seen from the data in Table 3 that the oil-control and acne-removing masks of Examples 5-8 have good oil-control effects, with oil removal rates of about 80%, while the oil removal rates of Examples 9 to 11 are slightly worse. The lack of the extract of the Herba Lycoris Radiatae causes the skin to have poor absorption capacity for the composition, so that the effects of each component are not brought into full play. The absence of Rheum palmatum as a fat suppressant greatly reduces the fat suppression effect of the composition, which also confirms that the effect of using only vitamin B6 as a fat suppressant is not significant, and when vitamin B6 is not used, the effect of Rheum palmatum is also slightly reduced. It can be seen that the combined effect of the components is stronger than the effect of a single component, and Rheum palmatum and vitamin B6 have a strong synergistic effect in inhibiting oil secretion.

[0075] (2) The skin condition of each group of 12 subjects was evaluated according to the clean and translucent, reduced oil secretion, acne cure, acne scar repair and overall score. The evaluation method was: 10 people were selected to score each subject after using the mask compared with the condition before use through sensory evaluation, and the average value of each group was calculated to obtain the final score of each embodiment. (The scoring standard is: set 0-10 points, 10 points for the best, 0 points for the worst). The statistical score results of the skin changes of the subjects are shown in Table 4.

[0076] Table 4

[0077] Effects Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Embodiment 11 Clean and transparent 9 8.5 8.7 8.5 8 7.5 6 Reduced oil output 9 8.5 8.5 9.5 8 6 6.5 Acne cure 8.5 9 9 9 6 5 5 Repair acne scars 8.7 8.5 9.5 9 6 5.5 6.5 Overall rating 9 10 9.5 9 7 6 6

[0078] From the usage of the subjects, the oil-controlling and anti-acne composition of the present invention has a good therapeutic effect and can generally satisfy the users, and also confirms the synergistic effect between the components.

[0079] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. An external oil-controlling and acne-removing composition, characterized in that: The invention is composed of the following components in percentage by mass: 8-20% Chinese herbal medicine extract, 0.5-2% vitamin B6, 1-3% chlorogenic acid, 5-10% ethanol, 0.5-5.5% moisturizer, 0.02-0.15% citric acid, 0.05-0.35% thickener, and the balance is deionized water; the Chinese herbal medicine extract is made from Hemp Leaf Lotus, Pu'er Tea, Palm Leaf Rheum and Pueraria lobata; The preparation method of the Chinese medicine extract is: (1) Crush the dried lotus leaf, Pu'er tea, palm leaf rhubarb and kudzu root respectively and set aside; (2) adding Pu'er tea to a citric acid solution, soaking it at a temperature of 80-90°C, and then filtering it; soaking the residue in 80-90°C distilled water and filtering it; repeating this process twice, and combining the three filtrates; (3) mixing other crushed materials, adding them into an ethanol solvent for immersion, ultrasonically extracting them at 40-50° C. for 30-60 min, and filtering to obtain an extract; (4) combining the filtrate obtained in step (2) and the extract obtained in step (3), evaporating the solvent, and obtaining a Chinese medicine extract.

2. The external application Chinese medicine composition for oil control and acne removal according to claim 1, characterized in that: The Chinese medicinal extract is prepared from 15-30 parts of Helianthus annuus, 30-65 parts of Pu'er tea, 50-75 parts of Rheum palmatum and 40-70 parts of Pueraria root according to weight proportions.

3. The external application Chinese medicine composition for oil control and acne removal according to claim 2, characterized in that: The Chinese medicinal extract is prepared from 20-25 parts of Helianthus annuus, 40-60 parts of Pu'er tea, 55-65 parts of Rheum palmatum and 45-60 parts of Pueraria root according to weight proportions.

4. The external application Chinese medicine composition for oil control and acne removal according to claim 1, 2 or 3, characterized in that: The moisturizing agent is sodium hyaluronate.

5. The external application Chinese medicine composition for oil control and acne removal according to claim 4, characterized in that: The mass percentage of the citric acid is 0.02-0.1%.

6. A method for preparing the external application Chinese medicine composition for oil control and acne removal according to claim 1, characterized in that: The method comprises the following steps: adding Chinese herbal extract, vitamin B6, moisturizer and citric acid into deionized water according to the formula amount and mixing them evenly; adding chlorogenic acid into ethanol and stirring to dissolve, then fully mixing the two, and then adding a thickener and stirring evenly.

7. The method for preparing the external application Chinese medicine composition for oil control and acne removal according to claim 6, characterized in that: In the step (1), the hemp leaf lotus, Pu'er tea, palm leaf rhubarb and kudzu root are crushed into 20-30 meshes.

8. The method for preparing the external application Chinese medicine composition for oil control and acne removal according to claim 6, characterized in that: In the step (2), the first heat preservation and soaking time is 35-45 minutes; the subsequent two heat preservation and soaking time is 25-35 minutes.

9. The method for preparing the external application Chinese medicine composition for oil control and acne removal according to claim 6, characterized in that: In the step (3), the material-liquid ratio of the pulverized material to the solvent is 1:20-35 g / L.

10. The method for preparing the external application Chinese medicine composition for oil control and acne removal according to claim 6, characterized in that: The frequency of ultrasonic extraction in step (3) is 20-40 kHz.

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