Foam facial cleanser and preparation method thereof

Abstract

The invention relates to the field of facial cleansing products, in particular to a foam facial cleanser and a preparation method thereof. The foam facial cleanser is prepared from the following components in percentage by mass: 1 to 5 percent of polyhydric alcohols, 10 to 18 percent of an ampholytic surfactant, 1 to 5 percent of an amino acid type surfactant, 1 to 5 percent of a nonionic surfactant, 0 to 1 percent of a preservative, 0 to 0.001 percent of a coloring agent, 0.01 to 0.05 percent of a radix puerariae extract, 0.01 to 0.05 percent of a rhizoma anemarrhenae root extract, 0.001 to 0.03 percent of a flos sophorae bud extract, 0.1 to 1 percent of a suspending agent, a skin conditioner and water. The foam facial cleanser provided by the invention has the advantages of improving the stability of foam, enhancing the fineness of the foam, providing good skin feeling and the like.

Description

Technical Field

[0001] The present application relates to the field of facial cleansing products, and more specifically, to a foam facial cleanser and a preparation method thereof. Background Art

[0002] With the acceleration of modern life and the improvement of health awareness, consumers have an increasing demand for skin care products, especially in the selection of daily cleansing products - facial cleansers, which require them to have efficient cleaning capabilities to remove dirt and excess oil on the skin surface, and pay more and more attention to the mildness of the products, the user experience and the integration of natural ingredients. As the first step in skin care, the performance of facial cleansers directly affects the absorption effect of subsequent skin care products and the overall health of the skin.

[0003] In the related technologies, most products rely on the compounding strategy of surfactants or the addition of high molecular polymers to achieve stable and durable foam. This method can enhance the stability and durability of foam by optimizing the interaction between surfactant systems and utilizing the adsorption and bridging effect of high molecular polymers on the foam interface.

[0004] In order to improve the cleansing, fat-dissolving and oil-removing capabilities of facial cleansers, relevant technologies generally adopt the method of increasing the content of surfactants, or directly introducing plant extracts with natural oil-removing effects. These plant extracts are gradually favored by consumers for their mild and natural characteristics, and have become an important means to increase product added value.

[0005] However, while the above technologies bring significant advantages, they also expose certain limitations. There is an inherent contradiction between foam stability and the addition of plant extracts. In order to maintain the stability of the foam, a certain amount of stabilizers, such as high molecular polymers, are often required to be added. However, excessive stabilizers may interfere with the pH balance of the product, affect the mildness of the product, and even have an adverse effect on the stability of the plant extracts, resulting in degradation or inactivation of the active ingredients.

[0006] Therefore, how to effectively protect the activity of plant extracts and promote their full release and absorption during the cleansing process while ensuring foam stability and cleaning efficiency has become a technical problem that needs to be solved urgently. Summary of the invention

[0007] In order to improve the stability of cleanser foam, enhance the fineness of foam, and provide a good skin feel, the present application provides a foam cleanser and a preparation method thereof.

[0008] In a first aspect, the present application provides a foam cleanser, which adopts the following technical solution: A foam cleanser comprises the following components in percentage by mass: 1-5% of polyol, 10-18% of amphoteric surfactant, 1-5% of amino acid surfactant, 1-5% of nonionic surfactant, 0-1% of preservative, 0-0.001% of colorant, 0.01-0.05% of kudzu root extract, 0.01-0.05% of anemarrhena root extract, 0.001-0.03% of sophora japonica bud extract, 0.1-1% of suspending agent, skin conditioner and water.

[0009] By adopting the above technical scheme, with the cooperation of Pueraria root extract, Anemarrhena root extract and Sophora japonica bud extract, the effect of increasing foam and stabilizing foam is achieved. The foam cleanser provided by the present application has a dense and fine foam after rubbing, which is comfortable to touch and shows long-lasting stability. It is not easy to break or disappear even during the cleaning process. This feature enables the cleanser to more deeply remove deep dirt and grease on the skin surface, greatly improving the cleaning efficiency, and also brings a more time-saving and labor-saving experience to users.

[0010] Moreover, the kudzu root extract, the anemarrhena root extract, and the sophora japonica bud extract all have good skin affinity, and they can act gently on the skin, significantly reducing the irritation of other chemical components that may exist in the cleanser to the skin. This feature enables the cleanser of the present application to protect the skin barrier to the greatest extent while cleaning, reducing the irritation or discomfort that the user may feel during use, and is particularly suitable for long-term use by users with sensitive skin.

[0011] The facial cleanser provided in this application not only focuses on the cleaning effect, but also integrates the dual functions of moisturizing and oil control. The active ingredients in the plant extracts can penetrate into the skin, provide sufficient moisture and nutrition to the skin, and at the same time regulate sebum secretion to help the skin achieve a water-oil balance. After use, users can clearly feel that their skin becomes more delicate, smooth, and elastic, and their skin quality is significantly improved.

[0012] Moreover, the combination of kudzu root extract, anemarrhena root extract, and sophora japonica bud extract with surfactants can still show strong foaming, foam stabilization, cleaning and other effects after significantly reducing the amount of surfactant used. Not only does it reduce production costs, but it also improves the strong false slippery feeling after washing caused by the addition of a large amount of amphoteric surfactants. After using the facial cleanser of the present invention, users can feel a more natural and refreshing skin feel after washing, which improves the overall use satisfaction.

[0013] Preferably, the mass ratio of the Pueraria root extract, the Anemarrhena root extract and the Sophora japonica bud extract is (4-6): (4-6): (1-3).

[0014] By adopting the above technical scheme, the mass ratio of Pueraria root extract, Anemarrhena root extract and Sophora japonica bud extract is further limited, which helps to play a better foam stabilizing and foam increasing role in the system, produce a large amount of fine foam, and can more fully contact the oil and dirt on the skin surface and remove them, thereby achieving a better cleaning effect.

[0015] Preferably, the amphoteric surfactant comprises at least a mixture of one or more of cocamidopropyl betaine and sodium lauroamphoacetate.

[0016] Preferably, the amino acid surfactant comprises at least one or more of disodium cocoyl glutamate and potassium cocoyl glycinate.

[0017] Preferably, the nonionic surfactant includes at least one or more of cocamide methyl MEA, PEG-150 pentaerythritol tetrastearate, PPG-2 hydroxyethyl cocamide, and lauryl glucoside.

[0018] Preferably, the polyol comprises at least glycerol.

[0019] Preferably, the amphoteric surfactant is cocamidopropyl betaine and sodium lauroamphoacetate, the amino acid surfactant is disodium cocoyl glutamate and potassium cocoyl glycinate, the nonionic surfactant is cocamide methyl MEA, PEG-150 pentaerythritol tetrastearate, PPG-2 hydroxyethyl cocamide, lauryl glucoside, and the polyol is glycerol.

[0020] Preferably, according to the mass percentage of the foam cleanser, cocamidopropyl betaine is 0.5-3%, sodium lauroamphoacetate is 10-15%, disodium cocoyl glutamate is 0.5-3%, potassium cocoyl glycinate is 0.5-2%, cocamide methyl MEA is 0.1-1.5%, PEG-150 pentaerythritol tetrastearate is 1-2.5%, PPG-2 hydroxyethyl cocamide is 0.1-1.5%, lauryl glucoside is 0.5-2%, and glycerin is 1-3%.

[0021] By adopting the above technical scheme, the types of amphoteric surfactants, amino acid surfactants, nonionic surfactants, and polyols and the range of their usage in the system are further limited, which can more fully cooperate with Pueraria lobata extract, Anemarrhena asphodeloides root extract, and Sophora japonica bud extract, which helps to improve the stability of the foam and form a dense, rich, stable foam. The skin is smooth and moisturized after washing, ensuring a good skin feel.

[0022] Preferably, the skin conditioning agent includes ethylhexylglycerin, allantoin, salicylic acid, chelating agents, and fragrances.

[0023] Preferably, the preservatives include phenoxyethanol, dichlorobenzyl alcohol, and caprylhydroxamic acid.

[0024] Preferably, the suspending agent is an acrylic acid (ester) copolymer.

[0025] Preferably, the chelating agent is disodium EDTA.

[0026] In a second aspect, the present application provides a method for preparing a foam cleanser, using the following technical solution: A method for preparing a foam cleanser comprises the following steps: Step 1: Mixing an amphoteric surfactant, an amino acid surfactant, and a nonionic surfactant at 80-85° C. until uniform, to obtain a first mixture; Step 2: Cooling to 45-50° C., mixing the first mixture with the suspending agent until uniform, to obtain a second mixture; Step 3: Cool down to 40-45°C, mix the remaining raw materials with the second mixture until uniform, and obtain a foaming cleanser.

[0027] In summary, this application has the following beneficial effects: 1. The specific plant extracts in the facial cleanser provided in this application can effectively improve the foam stability, enhance the cleaning effect, form dense and rich stable foam, and make the skin smooth and moisturized after washing.

[0028] 2. The facial cleanser provided in the present application uses a compound of specific amphoteric surfactants and amino acid surfactants as cleaning ingredients, and is combined with specific plant extracts, which can reduce the amount of surfactant used, has good cleaning power, rich foam, is easy to rinse, and provides a good skin feel without a false and slippery feeling.

[0029] 3. This application preferably uses various ingredients in a coordinated manner, and the system is stable, safe and non-irritating, suitable for all skin types. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a diagram of the foam structure of the 5% aqueous solution of Example 1 of the present application at different times, which correspond from top to bottom to the end of foaming, 7.5 minutes after the end of foaming, and 15 minutes after the end of foaming.

[0031] Figure 2 This is a diagram of the foam structure of the 5% aqueous solution of Comparative Example 3 of the present application at different times, which correspond from top to bottom to the end of foaming, 7.5 minutes after the end of foaming, and 15 minutes after the end of foaming. DETAILED DESCRIPTION

[0032] The present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0033] The raw materials used in the following examples and comparative examples are all commercially available products. Example

[0034] Example 1 A foam cleansing milk comprises the following components: polyol, amphoteric surfactant, amino acid surfactant, nonionic surfactant, preservative, colorant, kudzu root extract, anemarrhena root extract, sophora japonica bud extract, suspending agent, skin conditioner and water.

[0035] The polyol is glycerol.

[0036] The amphoteric surfactants are cocamidopropyl betaine and sodium lauroamphoacetate.

[0037] The amino acid type surfactants are disodium cocoyl glutamate and potassium cocoyl glycinate.

[0038] The nonionic surfactants are cocamide methyl MEA, PEG-150 pentaerythritol tetrastearate, PPG-2 hydroxyethyl cocamide, and lauryl glucoside.

[0039] The preservatives are phenoxyethanol, dichlorobenzyl alcohol, and caprylhydroxamic acid.

[0040] The colorants are CI 74160 and CI 19140.

[0041] The suspending agent is an acrylic acid (ester) copolymer.

[0042] The skin conditioning agents are ethylhexylglycerin, allantoin, salicylic acid, chelating agents, and fragrances, and the chelating agent is specifically disodium EDTA.

[0043] The mass ratio of kudzu root extract, anemarrhena root extract, and sophora japonica bud extract is (4-6): (4-6): (1-3), that is, it can be 4:6:1, or 4:6:3, or 6:4:1, or 6:4:3, or 5:5:2, or 5:6:2, which are not listed in detail here. In this embodiment, the mass ratio of kudzu root extract, anemarrhena root extract, and sophora japonica bud extract is 5:5:2.

[0044] The specific amount of each raw material is shown in Table 1.

[0045] The present application also provides a method for preparing a foam cleanser, comprising the following steps: Step 1: Add an amphoteric surfactant, an amino acid surfactant, and a nonionic surfactant into an emulsifying pot, and mix them at 82° C. until they are uniform, to obtain a first mixture.

[0046] Step 2: Cool down to 45°C, add a suspending agent into the emulsifying pot, mix the suspending agent with the first mixture, and stir until uniform to obtain a second mixture.

[0047] Step 3: Cool down to 43°C, add the remaining raw materials into the second mixture in the emulsifying pot, and stir until uniform.

[0048] The mixture was filtered through a 200-mesh filter cloth and then allowed to stand for 10 hours to form a green, transparent, viscous liquid, thereby obtaining a foaming facial cleanser.

[0049] Example 2 A foam cleanser is different from Example 1 in that the amounts of various raw materials are different, see Table 1 for details.

[0050] A method for preparing a foam cleanser, which is different from that of Example 1, comprises the following steps: Step 1: Add an amphoteric surfactant, an amino acid surfactant, and a nonionic surfactant into an emulsifying pot, and mix them at 80° C. until they are uniform, to obtain a first mixture.

[0051] Step 2: Cool down to 45°C, add a suspending agent into the emulsifying pot, mix the suspending agent with the first mixture, and stir until uniform to obtain a second mixture.

[0052] Step 3: Cool down to 40°C, add the remaining raw materials into the second mixture in the emulsifying pot, and stir until uniform.

[0053] The mixture was filtered through a 200-mesh filter cloth and then allowed to stand for 10 hours to form a green, transparent, viscous liquid, thereby obtaining a foaming facial cleanser.

[0054] Example 3 A foam cleanser is different from Example 1 in that the amounts of various raw materials are different, see Table 1 for details.

[0055] A method for preparing a foam cleanser, which is different from that of Example 1, comprises the following steps: Step 1: Add an amphoteric surfactant, an amino acid surfactant, and a nonionic surfactant into an emulsifying pot, and mix them at 85° C. until they are uniform, to obtain a first mixture.

[0056] Step 2: Cool down to 50°C, add a suspending agent into the emulsifying pot, mix the suspending agent with the first mixture, and stir until uniform to obtain a second mixture.

[0057] Step 3: Cool down to 45°C, add the remaining raw materials into the second mixture in the emulsifying pot, and stir until uniform.

[0058] The mixture was filtered through a 200-mesh filter cloth and then allowed to stand for 10 hours to form a green, transparent, viscous liquid, thereby obtaining a foaming facial cleanser.

[0059] Table 1 Comparative Example Comparative Example 1 A foaming facial cleanser, which is different from Example 1 in that the Pueraria root extract, the Anemarrhena root extract, and the Sophora japonica bud extract are replaced with Portulaca oleracea extract, as shown in Table 2 for details.

[0060] That is, the content of Pueraria root extract is 0, the content of Anemarrhena root extract is 0, the content of Sophora japonica bud extract is 0, and the content of Portulaca oleracea extract is 0.024%.

[0061] The content of each raw material is shown in Table 2.

[0062] Comparative Example 2 A foam facial cleanser is different from Example 1 in that the kudzu root extract, the anemarrhena root extract and the sophora japonica bud extract are omitted, and sodium cocoyl glutamate is added, and the content of sodium cocoyl glutamate is 7.2%.

[0063] The content of each raw material is shown in Table 2.

[0064] Comparative Example 3 A foaming facial cleanser, which is different from Example 1 in that the kudzu root extract, the anemarrhena root extract, and the sophora japonica bud extract are replaced with water, as shown in Table 2 for details.

[0065] That is, the kudzu root extract is 0, the Anemarrhena root extract is 0, the Sophora japonica bud extract is 0, and water is used to supplement the balance to 100%.

[0066] The content of each raw material is shown in Table 2.

[0067] Table 2 Performance testing 1. Foam stability: The stability of foam mainly depends on the drainage speed and the strength of the liquid film. The evaluation of the liquid separation half-life, the bubble number half-life and the foam persistence value can comprehensively analyze the stability of the foam.

[0068] The foam performance analysis was conducted using a German Kruss DFA-100 dynamic foam analyzer, and the half-life of liquid separation (tFLS 50%), the half-life of the number of bubbles (tBC 1 / 2) and HRV (the time from 50% to 75% discharge of liquid separation) were recorded in Table 3.

[0069] Test conditions: Temperature: 23±1℃ Concentration: dilute the foam cleansing milk of Example 1 and Comparative Examples 1-4 to a 5% aqueous solution Solution volume: 50 ml Speed: 3000RPM / min Foaming time: Stir for 3 seconds and stop for 3 seconds, for 30 cycles Defoaming time: 15 minutes Table 3 The foam structure diagram of the 5% aqueous solution of Example 1 at each time is shown in FIG. Figure 1 , from left to right respectively correspond to the end of foaming, 7.5 minutes after the end of foaming, and 15 minutes after the end of foaming.

[0070] The foam structure diagram of the 5% aqueous solution of Comparative Example 3 at each time is shown in FIG. Figure 2 , from left to right respectively correspond to the end of foaming, 7.5 minutes after the end of foaming, and 15 minutes after the end of foaming.

[0071] according to Figure 1 and Figure 2 It can be seen from the comparison that the foam of the 5% aqueous solution of Example 1 at each time is finer than that of Comparative Examples 1-3.

[0072] Combined with the data in Table 3, it can be seen that although the bubble number half-life of Comparative Example 1-2 is similar to that of Examples 1-3, the data in terms of liquid separation half-life and HRV are far inferior to those of Examples 1-3. Therefore, in general, the foam cleansing milk of Examples 1-3 shows the best results in the foam stability test.

[0073] It is worth mentioning that the technical solutions of Examples 1-3 show better foam stability than the technical solution with increased dosage of surfactant (Comparative Example 2). This shows that the technical solution provided by the present application can effectively reduce the dosage of surfactant, and can achieve or even far exceed the effect of a large amount of surfactant on foam stability by combining a small amount of specially selected kudzu root extract, anemarrhena root extract, and sophora japonica bud extract, so the present application has a very significant improvement.

[0074] Comparative Example 1 is based on Example 1, but the combination of Pueraria root extract, Anemarrhena root extract and Sophora japonica bud extract is destroyed and replaced with other plant extracts. The data of liquid separation half-life and HRV are not good. It shows that the special effect of the present application can not be achieved by randomly selecting plant extracts, but only by the combination of specific Pueraria root extract, Anemarrhena root extract and Sophora japonica bud extract.

[0075] 2. Skin feeling after washing: Test samples: foam facial cleansers of Example 1 and Comparative Examples 1-3.

[0076] Thirty volunteers with healthy skin aged 20-40 were selected. They used the sample cleansing products at the same time in the morning and four products for four days respectively. Questionnaires were distributed for self-assessment.

[0077] The questionnaire questions include the following, all of which are single-choice: Question 1: Foam richness Options: Almost no foam, Less foam, Medium foam, More foam, Very foamy Question 2: Foam density Options: Very sparse, Relatively sparse, Medium dense, Relatively dense, Very dense Question 3: Cleaning ability Options: Very weak, Weak, Medium, Strong, Very strong Question 4: Skin feels tight after washing Options: Very tight, Strong tight, Moderate tight, Slight tight, No tight Question 5: How moisturized the skin feels after washing Options: Very dry, Relatively dry, Generally moisturizing, Relatively moisturizing, Very moisturizing Question 6: Is there any false sliding? Options: Yes, No Question 7: Discomfort options: Itchy / hot / swollen / numb / red spots, irritated eyes and tearing, slight itching and heat, other discomfort, no discomfort Question 8: Which of the four facial cleansers do you prefer? Options: Example 1, Comparative Example 1, Comparative Example 2, Comparative Example 3 Note: In question 4, as long as you choose any of the following: “extremely strong tightness, strong tightness, moderate tightness, slight tightness”, it means you “have” a feeling of tightness.

[0078] In question 7, as long as you choose any of the following: “itchy / hot / swelling / numbness / red spots on the skin, irritated eyes and tearing, slight itchy and hot sensation, other discomforts”, it means you “have” discomfort.

[0079] Please refer to Table 4 for questionnaire satisfaction.

[0080] Table 4 According to the test data in Table 4, the facial cleanser provided in the present application has rich and dense foam, good cleaning power, and the skin does not feel tight, is very moisturized, and does not feel slippery or uncomfortable. This shows that the facial cleanser provided in the present application can simultaneously ensure the stability of the foam and the excellent cleansing effect, and has a more prominent and significant effect than the facial cleansers of Comparative Examples 1-3.

[0081] 3. Moisturizing effect: Ten volunteers with healthy skin aged 20-40 were selected to try the facial cleansing milk samples of Example 1 and Comparative Examples 1-3.

[0082] The trial process is as follows: After washing the inside of the arm with clean water, select 5 3*3cm areas as test areas, with each area 1cm apart, and use the corresponding cleanser sample to clean each area in a circular motion for 1 minute; then rinse the sample on your hands with clean water and wipe off the water on your hands with a paper towel.

[0083] The volunteers completed the test in a constant temperature and humidity environment (temperature 20-22°C, relative humidity 40%-60%). The multi-probe skin efficacy tester was used to test the volunteers' skin moisture content before using the cleansing samples, 0 hours after use, 1 hour after use, and 2 hours after use. Each area was measured 3 times and the average value was taken. The results are shown as the average value of the tests of 10 volunteers, see Table 5.

[0084] The results in the table are the average values ​​of skin moisture content of the 10 volunteers in this group.

[0085] Blank control: Do not use facial cleanser. That is, moisten the face with clean water, and use clean water to clean all parts of the face in a circular motion for 1 minute; then rinse the sample on the face with clean water, and wipe the water off the face with a tissue.

[0086] Table 5 Category Blank control Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Before use 21.79 22.96 22.75 22.08 21.13 After 1 hour of use 17.88 24.33 20.79 20.67 19.65 After 2 hours of use 20.58 24.00 22.08 22.63 22.63 From the records in Table 5, it can be seen that the facial cleanser provided by the present application has a good moisturizing effect, can significantly increase the skin moisture content of volunteers, and within 1 hour and 2 hours after use, the moisture content of the skin remains at a stable level, indicating that the facial cleanser of Example 1 has a good water-locking and moisturizing effect. The skin moisture content of the volunteers using the facial cleansers of Comparative Examples 1-3 decreased to varying degrees compared with Example 1, which shows that the changes in surfactants and skin conditioners will lead to a decrease in the moisturizing and water-locking ability of the facial cleanser. The various components of the facial cleanser of the present application embodiment work synergistically, which is conducive to the product to exert a moisturizing and water-locking effect.

[0087] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A foam cleanser, characterized in that: The invention comprises the following components in percentage by mass: 1-5% polyol, 10-18% amphoteric surfactant, 1-5% amino acid surfactant, 1-5% nonionic surfactant, 0-1% preservative, 0-0.001% colorant, 0.01-0.05% kudzu root extract, 0.01-0.05% anemarrhena root extract, 0.001-0.03% sophora japonica bud extract, 0.1-1% suspending agent, skin conditioner and water.

2. The foam cleanser according to claim 1, characterized in that: The mass ratio of the Pueraria root extract, the Anemarrhena root extract and the Sophora japonica bud extract is (4-6): (4-6): (1-3).

3. The foam cleanser according to claim 1, characterized in that: The amphoteric surfactant comprises at least one or more of cocamidopropyl betaine and sodium lauroamphoacetate.

4. The foam cleanser according to claim 1, characterized in that: The amino acid surfactant comprises at least one or more of disodium cocoyl glutamate and potassium cocoyl glycinate.

5. The foam cleanser according to claim 1, characterized in that: The nonionic surfactant includes at least one or more of cocamide methyl MEA, PEG-150 pentaerythritol tetrastearate, PPG-2 hydroxyethyl cocamide, and lauryl glucoside.

6. The foam cleanser according to claim 1, characterized in that: The polyol includes at least glycerol.

7. The foam cleanser according to claim 1, characterized in that: The amphoteric surfactants are cocamidopropyl betaine and sodium lauroamphoacetate, the amino acid surfactants are disodium cocoyl glutamate and potassium cocoyl glycinate, the nonionic surfactants are cocamide methyl MEA, PEG-150 pentaerythritol tetrastearate, PPG-2 hydroxyethyl cocamide, and lauryl glucoside, and the polyol is glycerol.

8. The foam cleanser according to claim 7, characterized in that: According to the mass percentage of the foam cleanser, cocamidopropyl betaine is 0.5-3%, sodium lauroamphoacetate is 10-15%, disodium cocoyl glutamate is 0.5-3%, potassium cocoyl glycinate is 0.5-2%, cocamide methyl MEA is 0.1-1.5%, PEG-150 pentaerythritol tetrastearate is 1-2.5%, PPG-2 hydroxyethyl cocamide is 0.1-1.5%, lauryl glucoside is 0.5-2%, and glycerin is 1-3%.

9. A method for preparing the foam cleanser according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Mixing an amphoteric surfactant, an amino acid surfactant, and a nonionic surfactant at 80-85° C. until uniform, to obtain a first mixture; Step 2: Cooling to 45-50° C., mixing the first mixture with the suspending agent until uniform, to obtain a second mixture; Step 3: Cool down to 40-45°C, mix the remaining raw materials with the second mixture until uniform, and obtain a foaming cleanser.

Images