Long-lasting anti-acne liquid foundation and preparation method thereof

Abstract

The present invention discloses a long-lasting makeup and acne-removing liquid foundation, and the raw materials for preparation include by weight percentage: emulsifier 1 8%, emollient 2 10%, silicone oil 15 30%, thickener 2 10%, film former 1 15%, anti-caking polymer 2 8%, moisturizer 2 8%, acne-removing component 1 5%, powder 10 20%, water supplement surplus. The present invention can refine the powder into a liquid foundation with a small particle size and uniform texture by using two high-pressure homogenization processes to the slurry, effectively increasing the specific surface area of ​​the powder, the powder particle size is uniform and not easy to agglomerate, and the fit durability with the skin is high, and the makeup concealer effect is good. And before the secondary high-pressure homogenization, the acne-removing component is added, the effective contact time of the powder and the acne-removing component can be increased, so that the liquid foundation has an antibacterial and anti-inflammatory effect on the surface skin after makeup, and the liquid foundation is prevented from producing the effect of suffocating acne, and has a better acne-removing effect, so as to achieve a real makeup and care integration.

Description

Technical Field

[0001] The invention relates to a long-lasting anti-acne foundation liquid and a preparation method thereof, and relates to A61K, in particular to the field of makeup preparation products. Background Art

[0002] Liquid foundation is an important type of cosmetics. It has the effects of whitening, concealing blemishes, and brightening the skin tone after application. The makeup-lasting time is an important indicator for measuring liquid foundation. In order to prolong the makeup-lasting time of liquid foundation, some products on the market add excessive oily film-forming components to the liquid foundation, which prolongs the film-forming time of the liquid foundation on the skin surface, but it will clog the pores and cause acne problems on the skin. In addition, the excessive addition of oily components will make it more difficult to remove makeup. Incomplete makeup removal will further clog the skin pores, and the oil on the skin surface will peroxidize and become rancid, causing serious skin problems. In order to address the skin acne problem that is easily caused by liquid foundation, liquid foundations that can remove acne have gradually been developed on the market. However, the combination of acne-removing components and liquid foundation is not effective, resulting in an insignificant acne-removing effect. Therefore, it is crucial to develop a light, docile, and non-acne-causing long-lasting liquid foundation.

[0003] Chinese invention patent CN201510988575.3 discloses an anti-acne foundation and its preparation method, which uses rose extract and jasmine endosperm powder as a foundation to improve the quality of the powder and reduce skin acne. However, the combination of rose extract and jasmine endosperm powder is poor, and the prepared liquid foundation has poor acne removal effect. Chinese invention patent CN201811001233.8 discloses a whitening and anti-allergic liquid foundation and its preparation method, which uses nano pearl powder, rose essence and egg white to prepare a liquid foundation suitable for sensitive skin with easier absorption of nutrients, but the liquid foundation does not contain oily components, which may lead to poor makeup-lasting effect of the liquid foundation. Summary of the invention

[0004] In order to prepare a liquid foundation with long lasting makeup time, good concealing effect and no acne on the skin, the first aspect of the present invention provides a long-lasting and anti-acne liquid foundation, and the preparation raw materials include, by weight percentage: 1-8% emulsifier, 2-10% emollient, 15-30% silicone oil, 2-10% thickener, 1-15% film former, 2-8% anti-caking polymer, 2-8% moisturizer, 1-5% anti-acne ingredient, 10-20% powder, and water to make up the balance.

[0005] As a preferred embodiment, the preparation raw materials include, by weight percentage: 2-5% emulsifier, 4-8% emollient, 20-25% silicone oil, 5-8% thickener, 2-10% film former, 4-6% anti-caking polymer, 4-6% moisturizer, 1-5% anti-acne ingredient, 10-16% powder, and the balance is made up of water.

[0006] As a preferred embodiment, the emulsifier is selected from two or more of bis-PEG / PPG-14 / 14 polydimethylsiloxane, PEG / PPG-18 / 18 polydimethylsiloxane, cetyl PEG / PPG-10 / 1 polydimethylsiloxane, lauryl PEG / PPG-18 / 18 polymethylsiloxane, polyglyceryl-4 isostearate, sorbitan isostearate, and PEG-10 polydimethylsiloxane.

[0007] As a preferred embodiment, the emulsifier is a combination of PEG / PPG-18 / 18 polydimethylsiloxane and cetyl PEG / PPG-10 / 1 polydimethylsiloxane. There is no special limitation on the manufacturer, PEG / PPG-18 / 18 polydimethylsiloxane can be purchased from DOW CORNING, model DC 5225C or CM TECH CHINA, model NEOSIL 18C5; cetyl PEG / PPG-10 / 1 polydimethylsiloxane can be purchased from EVONIK, model ABIL EM 90 or SHIN-ETSU, model KF-6048.

[0008] As a preferred embodiment, the weight ratio of the PEG / PPG-18 / 18 polydimethylsiloxane to the cetyl PEG / PPG-10 / 1 polydimethylsiloxane is (1-1.5):1.

[0009] As a preferred embodiment, the emollient is selected from a combination of two or more of caprylic / capric triglyceride, neopentyl glycol diheptanoate, cetyl ethylhexanoate, tocopheryl acetate, dimethicone / vinyl dimethicone crosspolymer, bis-PEG / PPG-14 / 14 dimethicone, diisopropyl sebacate, and isopropyl lauroyl sarcosinate.

[0010] As a preferred embodiment, the emollient is a combination of tocopherol acetate and dimethicone / vinyl dimethicone crosspolymer.

[0011] As a preferred embodiment, the weight ratio of tocopherol acetate to dimethicone / vinyl dimethicone cross-linked polymer is 1:(0.3-0.8), and more preferably 1:0.5.

[0012] As a preferred embodiment, the silicone oil is selected from a combination of two or more of cyclopentasiloxane, dimethicone, octylmethicone, cyclohexasiloxane and phenyltrimethicone.

[0013] As a preferred embodiment, the silicone oil is a combination of cyclopentasiloxane and polydimethylsiloxane.

[0014] As a preferred embodiment, the weight ratio of cyclopentasiloxane to polydimethylsiloxane is (3-5):1.

[0015] As a preferred embodiment, the thickener is selected from a combination of two or more of stearoyl inulin, disteardimethylammonium hectorite, dextrin, and silica dimethyl silylate.

[0016] As a preferred embodiment, the thickener is a combination of stearyl inulin and disteardimethylammonium hectorite.

[0017] As a preferred embodiment, the weight ratio of the stearoyl inulin to the disteardimethylammonium hectorite is 1:(20-40).

[0018] As a preferred embodiment, the film-forming agent is selected from one or a combination of trimethylsiloxysilicate, polypropylsilsesquioxane, acrylates / polytrimethylsiloxane methacrylate copolymer.

[0019] As a preferred embodiment, the film-forming agent is trimethylsiloxysilicate.

[0020] As a preferred embodiment, the anti-caking polymer is selected from two or more of polymethyl methacrylate, HDI / trimethylol hexyl lactone cross-linked polymer, methyl methacrylate cross-linked polymer, polymethyl silsesquioxane, diphenyl polydimethylsiloxane / vinyl diphenyl polydimethylsiloxane / silsesquioxane cross-linked polymer.

[0021] As a preferred embodiment, the anti-caking polymer is a combination of polymethyl methacrylate, HDI / trimethylol hexyl lactone cross-linked polymer, and methyl methacrylate cross-linked polymer.

[0022] As a preferred embodiment, the weight ratio of polymethyl methacrylate, HDI / trimethylol hexyl lactone crosslinked polymer, and methyl methacrylate crosslinked polymer is (1-4): (1-4): (1-4).

[0023] As a preferred embodiment, the moisturizing agent is selected from one or a combination of 1,2-pentanediol, 1,3-butylene glycol, glycerol, sodium hyaluronate, polyethylene glycol-32, panthenol, and glyceryl polyether-26.

[0024] As a preferred embodiment, the acne-removing ingredient is selected from one or a combination of Lotus japonicus seed extract, Manuka tree extract, and Magnolia officinalis bark extract.

[0025] As a preferred embodiment, the powder is a hydrophobic treated powder selected from one or a combination of titanium dioxide, color powder, mica, synthetic fluorphlogopite, and talc.

[0026] As a preferred embodiment, the hydrophobic treatment is selected from the group consisting of fatty acid treatment, silicone treatment, fatty acid soap treatment, fatty acid ester treatment, amino acid treatment, and alkyl silane treatment.

[0027] A second aspect of the present invention provides a method for preparing a long-lasting anti-acne liquid foundation, comprising the following steps:

[0028] (1) Weigh an emulsifier, a thickener, and a film-forming agent according to weight percentage, mix and heat to 40-80° C., stir and disperse evenly, and set aside;

[0029] (2) weighing an emollient and silicone oil according to weight percentage, stirring and mixing evenly, adding an anti-caking polymer and a powder in sequence, performing a high-pressure homogenization once to obtain a uniform slurry, adding an anti-acne component, performing a second high-pressure homogenization, obtaining a uniform anti-acne slurry, and setting aside;

[0030] (3) Slowly add the anti-acne powder obtained in step 2 and the moisturizer into step 1, emulsify at 70-75° C. for 20-25 min, add the remaining amount of water, mix evenly with a homogenizer, cool to 25-30° C., filter with a sieve, and fill to obtain a long-lasting anti-acne liquid foundation.

[0031] The applicant found in the experiment that the hydrophobic powder was subjected to a secondary high-pressure homogenization treatment, which can increase the degree of foundation's adherence to the skin and improve the makeup-holding effect. In addition, the addition of anti-acne ingredients during the second high-pressure homogenization can significantly improve the acne effect of the foundation, and at the same time have a certain acne effect on the skin. The possible reason is guessed to be: the hydrophobic powder can obtain particles with smaller particle sizes after high-pressure homogenization, increase the contact area between the particles and the silicone oil moisturizer, and form a uniform and delicate slurry. The present application also adds a combination of lotus root seed extract and manuka tree extract before the second high-pressure homogenization, and adopts a low-temperature, slow-speed treatment method to protect the biological activity of lotus root seed extract and manuka tree extract, and prolong the effective contact time between the extract and the slurry, increase the mixing uniformity of the extract and the foundation slurry, and while the foundation conceals blemishes, it can play a bactericidal and anti-inflammatory role on the skin pores, reduce the peroxidation and rancidity of skin oils, and avoid skin acne. It can even improve mild acne skin and achieve the effect of makeup and care.

[0032] As a preferred embodiment, in step 2, the conditions for the primary high-pressure homogenization are: pressure 100-200 MPa, temperature 40-80° C., flow rate 400-500 m / s, and treatment time 20-40 min.

[0033] As a preferred embodiment, in step 2, the conditions of the secondary high-pressure homogenization are: pressure 100-200 MPa, temperature 40-60° C., flow rate 200-300 m / s, and treatment time 30-60 min.

[0034] As a preferred embodiment, the average particle size of the uniform anti-acne slurry is 0.1-0.4 μm.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] (1) The long-lasting anti-acne liquid foundation of the present invention can refine the powder into a liquid foundation with small particle size and uniform texture by subjecting the powder slurry to two high-pressure homogenization treatments, thereby effectively increasing the specific surface area of ​​the powder. The powder particle size is uniform and not easy to agglomerate or clump, and the adhesion to the skin is long-lasting, and the long-lasting makeup concealing effect is good.

[0037] (2) The long-lasting anti-acne liquid foundation of the present invention can increase the effective contact time between the powder and the anti-acne ingredients by adding the anti-acne ingredients before the secondary high-pressure homogenization, so that the liquid foundation has a certain antibacterial and anti-inflammatory effect on the skin surface after makeup is applied, thereby avoiding the effect of the liquid foundation on acne. At the same time, it has a better acne-removing effect, achieving true integration of makeup and skin care.

[0038] (3) The long-lasting anti-acne liquid foundation of the present invention can make the liquid foundation have a good skin feel after application by introducing tocopherol acetate and polydimethylsiloxane / vinyl polydimethylsiloxane cross-linked polymer as emollients, thereby greatly improving the skin sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The skin intensity values ​​(AU) of volunteers at different time periods after using Example 1 and Comparative Example 1;

[0040] Figure 2 The concealer durability coefficient (%) of each time period after volunteers used Example 1 and Comparative Example 1;

[0041] Figure 3 The skin sensory evaluation of Example 1 and Comparative Example 1 was conducted by a cosmetics evaluation expert panel;

[0042] Figure 4 These are pictures showing the acne removal effects of volunteers after using Example 1 (first row) and Comparative Example 2 (second row); from left to right, they are before use, after 1 day, after 2 days, and after 3 days. DETAILED DESCRIPTION

[0043] The present invention is described in detail below by way of examples. It is necessary to point out here that the following examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by professionals and technicians in this field based on the content of the present invention above still belong to the scope of protection of the present invention.

[0044] In addition, unless otherwise stated, all raw materials used were commercially available.

[0045] Example 1

[0046] A long-lasting anti-acne liquid foundation, the preparation raw materials of which include, by weight percentage, 3% emulsifier, 6% emollient, 25% silicone oil, 6% thickener, 5% film former, 4% anti-caking polymer, 6% moisturizer, 3% anti-acne ingredient, 12% powder, and the balance is water.

[0047] The emulsifier is a combination of PEG / PPG-18 / 18 polydimethylsiloxane and cetyl PEG / PPG-10 / 1 polydimethylsiloxane, with a mass ratio of 1.5:1; PEG / PPG-18 / 18 polydimethylsiloxane is purchased from DOW CORNING, model DC 5225C; cetyl PEG / PPG-10 / 1 polydimethylsiloxane is purchased from EVONIK, model ABIL EM 90.

[0048] The emollients are tocopherol acetate and dimethicone / vinyl dimethicone crosspolymer in a mass ratio of 1:0.5; dimethicone / vinyl dimethicone crosspolymer is purchased from ELKEM SILICONESKOREA, model PURESIL BSG-800.

[0049] The silicone oil is cyclopentasiloxane and polydimethylsiloxane, with a mass ratio of 3:1; cyclopentasiloxane is purchased from MOMENTIVE model Silsoft 1202; polydimethylsiloxane is purchased from SHIN-ETSU model KF 96A 6CS.

[0050] The thickeners are stearyl inulin and disteardimethyl ammonium hectorite in a mass ratio of 1:25; the disteardimethyl ammonium hectorite is purchased from ELEMENTIS SPECIALTIES, model BENTONE 38V CG.

[0051] The film former is trimethylsiloxysilicate.

[0052] The silicon powder is polymethyl methacrylate, HDI / trimethylol hexyl lactone cross-linked polymer, and methyl methacrylate cross-linked polymer, with a mass ratio of 1:2:3; polymethyl methacrylate is purchased from SUNJIN CHEMICAL, model RHEODIFYER V9; HDI / trimethylol hexyl lactone cross-linked polymer is purchased from TOSHIKI PIGMENT, model TOSHIKI PLASTICPOWDER D-400; methyl methacrylate cross-linked polymer is purchased from AICA KOGYO, model GMX-0610.

[0053] The moisturizing agent is sodium hyaluronate; purchased from BIOLAND, model number SODIUM HYALURONATE.

[0054] The anti-acne ingredients are lotus seed extract and manuka tree extract, with a mass ratio of 1:1; the lotus seed extract was purchased from DERMALAB, model LOTUS CORNICULATUS SEED EXTRACT; the Magnolia officinalis bark extract was purchased from AMAXNUTRASOURCE, model MAGNOLIA BARK 50%.

[0055] The powder is hydrophobized titanium dioxide purchased from KSPEARL model MICRO TIO2SS.

[0056] A preparation method of a long-lasting anti-acne liquid foundation comprises:

[0057] (1) Weigh an emulsifier, a thickener, and a film-forming agent according to weight percentage, mix and heat to 60° C., stir and disperse evenly, and set aside;

[0058] (2) Weighing the emollient and silicone oil by weight percentage, stirring and mixing evenly, adding the anti-caking polymer and the powder in turn, performing a high-pressure homogenization at a pressure of 180 MPa, a temperature of 70° C., and a flow rate of 450 m / s for 30 min to obtain a uniform slurry, adding the anti-acne component, performing a second high-pressure homogenization at a pressure of 200 MPa, a temperature of 45° C., and a flow rate of 250 m / s for 40 min to obtain an anti-acne slurry with an average particle size of 0.251 μm, and setting aside; (3) Slowly adding the anti-acne slurry obtained in step 2 and the moisturizer to step 1, emulsifying at 75° C. for 20 min, adding the remaining water, mixing evenly with a homogenizer, cooling to 25° C., then filtering with a sieve and filling to obtain a long-lasting anti-acne foundation liquid.

[0059] Example 2

[0060] A long-lasting anti-acne liquid foundation and a preparation method thereof, wherein the specific steps are the same as those in Example 1, except that step 2 is: emollient and silicone oil are weighed by weight percentage, stirred and mixed evenly, an anti-caking polymer, a powder, and an anti-acne component are added in sequence, and homogenized at a speed of 3000 r / min for 30 minutes to obtain an anti-acne slurry with an average particle size of 0.504 μm, which is set aside.

[0061] Example 3

[0062] A long-lasting anti-acne liquid foundation and a preparation method thereof, wherein the specific steps are the same as those of Example 1, except that step 2 comprises: weighing an emollient and silicone oil by weight percentage, stirring and mixing evenly, sequentially adding an anti-caking polymer and a powder, performing a high-pressure homogenization at a pressure of 180 MPa, a temperature of 70°C, and a flow rate of 450 m / s for 30 min to obtain a uniform slurry, performing a secondary high-pressure homogenization at a pressure of 200 MPa, a temperature of 45°C, a flow rate of 250 m / s, and treating for 40 min to obtain a slurry with an average particle size of 0.251 μm for standby use; and step 3 comprises slowly adding the anti-acne slurry, an anti-acne component, and a moisturizer obtained in step 2 into step 1, emulsifying at 75°C for 20 min, adding a surplus of water, mixing evenly with a homogenizer, cooling to 25°C, filtering with a sieve, and filling to obtain a long-lasting anti-acne liquid foundation.

[0063] Performance Testing

[0064] 1. Evaluation of makeup lasting effect

[0065] (1) Fit test

[0066] Test samples: Example 1, Comparative Example 1.

[0067] Test instruments: C-Cube (PIXIENCE, France), CM2500D Spectrometer (KM, Japan) Test method: Select three 2*2cm areas on the inner side of the forearm, apply 10μl of the same lotion to each area, wait for full absorption, and then apply 8μl of the tested foundation to each area; then place a piece of filter paper on the tested area, press 5 times, and peel it off. Analyze the L value of the filter paper. The larger the L value, the less the product will fall off and the better the fit.

[0068] The test results are shown in Table 1:

[0069] Table 1

[0070] sample Filter paper (L) value Example 1 95.51 Comparative Example 1 92.38

[0071] It can be seen from Table 1 that, compared with Comparative Example 1, the use of Example 1 has better adherence, indicating that the liquid foundation after secondary homogenization has better skin adherence, which is conducive to long-term makeup holding and non-makeup removal.

[0072] (2) Concealer durability test

[0073] Test samples: Example 1, Comparative Example 1

[0074] Test equipment: JANUSⅡ, Image Pro Analyzer

[0075] Test method: Volunteers were screened and randomly divided into 2 groups, 30 in each group. After washing their faces, they used uniform toner and cream for basic skin care. The products to be tested were used respectively. The same part of the subjects was selected at different time periods to analyze the changes in Intensity value. The Intensity value corresponds to the brightness of the skin. The Intensity value was used to calculate the concealer durability coefficient. The larger the Intensity value, the better the concealer effect.

[0076] Judgment standard: concealer durability coefficient greater than 50% has concealer durability effect

[0077] Calculation formula: Concealer durability coefficient = (│AS′│) / (│AS│)×100(%)

[0078] A: Intensity value before using the product

[0079] S: Intensity value after using the product

[0080] S': Intensity value after 4h, 8h and 12h of using the product.

[0081] Test results see Figure 1 , Figure 2 .

[0082] Figure 1 is the skin intensity value (AU) at each time period; Figure 2 The concealer durability coefficient for each time period (%)

[0083] Depend on Figure 1 and Figure 2 It can be seen that Example 1 is superior to Comparative Example 1 in terms of concealing power and makeup lasting effect.

[0084] 2. Sensory evaluation

[0085] In the single use test on the skin conducted by the cosmetic evaluation expert group, the thickness, spreadability, and fit of Example 1 and Comparative Example 2 were evaluated in a scoring manner (0-5 points), with the higher the score, the better the effect. The evaluation was conducted on the following scale: 1 point is very dissatisfied, 2 points are relatively dissatisfied, 3 points are average, 4 points are relatively satisfied, and 5 points are very satisfied. The results are shown in Figure 3 .

[0086] 3. Evaluation of acne removal effect

[0087] Test samples: Example 1, Comparative Example 2

[0088] Test equipment: C-CUBE (PIXIENCE, France)

[0089] Test method: 30 volunteers aged 18-30 with facial acne (except pregnant or breastfeeding women) were randomly divided into 2 groups. The samples were used once in the morning and once in the evening every day. The target acne was photographed with C-CUBE (PIXIENCE, France) before use of the product, and 1 day, 2 days, and 3 days after use. The results are as follows: Figure 4 .

[0090] Acne removal effect pictures (from left to right, before use, 1 day later, 2 days later, 3 days later;

[0091] From top to bottom, the volunteers who used Example 1 and the volunteers who used Comparative Example 2)

[0092] It can be seen from the above figure that the inflammation caused by acne was significantly alleviated after the volunteers using Example 1 for 1 day, while the volunteers using Comparative Example 2 still had slight inflammation after 3 days of use.

Claims

1. A long-lasting anti-acne liquid foundation, characterized in that: The raw materials for preparation include, by weight percentage: 1-8% emulsifier, 2-10% emollient, 15-30% silicone oil, 2-10% thickener, 1-15% film former, 2-8% anti-caking polymer, 2-8% moisturizer, 1-5% anti-acne ingredient, 10-20% powder, and the balance is supplemented by water; The emollient is a combination of tocopherol acetate and dimethicone / vinyl dimethicone crosspolymer in a weight ratio of 1:(0.3-0.8); The emulsifier is a combination of PEG / PPG-18 / 18 polydimethylsiloxane and cetyl PEG / PPG-10 / 1 polydimethylsiloxane, with a weight ratio of (1-1.5):1; The silicone oil is a combination of cyclopentasiloxane and polydimethylsiloxane, with a weight ratio of (3-5):1; The thickener is a combination of stearyl inulin and disteardimethylammonium hectorite in a weight ratio of 1:(20-40); The film former is trimethylsiloxysilicate; The anti-caking polymer is a combination of polymethyl methacrylate, HDI / trimethylol hexyl lactone cross-linked polymer, and methyl methacrylate cross-linked polymer in a weight ratio of (1-4): (1-4): (1-4); The anti-acne ingredient is Lotus japonicus seed extract and Manuka tree extract, with a mass ratio of 1:1; The powder is hydrophobized titanium dioxide; The preparation method of the long-lasting anti-acne liquid foundation comprises the following steps: (1) Weigh the emulsifier, thickener and film-forming agent according to weight percentage, mix and heat to 40-80°C, stir and disperse evenly, and set aside; (2) Weighing the emollient and silicone oil according to the weight percentage, stirring and mixing evenly, adding the anti-caking polymer and the powder in turn, performing a high-pressure homogenization once to obtain a uniform slurry, adding the acne-removing component, performing a second high-pressure homogenization, obtaining a uniform slurry with acne-removing effect, and setting aside; (3) Slowly add the anti-acne powder obtained in step 2 and the moisturizer into step 1, emulsify at 70-75° C. for 20-25 min, add the remaining water, mix evenly with a homogenizer, cool to 25-30° C., filter with a sieve, and fill to obtain a long-lasting anti-acne liquid foundation.

2. The long-lasting anti-acne liquid foundation according to claim 1, characterized in that: The moisturizing agent is selected from one or a combination of 1,2-pentanediol, 1,3-butylene glycol, glycerol, sodium hyaluronate, polyethylene glycol-32, panthenol, and glycerol polyether-26.

3. A method for preparing the long-lasting anti-acne liquid foundation according to any one of claims 1 to 2, characterized in that: The following steps are involved: (1) Weigh the emulsifier, thickener and film-forming agent according to weight percentage, mix and heat to 40-80°C, stir and disperse evenly, and set aside; (2) Weighing the emollient and silicone oil according to the weight percentage, stirring and mixing evenly, adding the anti-caking polymer and the powder in turn, performing a high-pressure homogenization once to obtain a uniform slurry, adding the acne-removing component, performing a second high-pressure homogenization, obtaining a uniform slurry with acne-removing effect, and setting aside; (3) Slowly add the anti-acne powder obtained in step 2 and the moisturizer into step 1, emulsify at 70-75° C. for 20-25 min, add the remaining water, mix evenly with a homogenizer, cool to 25-30° C., filter with a sieve, and fill to obtain a long-lasting anti-acne liquid foundation.

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