Pearl white jade cream and preparation method thereof

Abstract

The invention relates to the technical field of cosmetics, and discloses pearl white jade cream and a preparation method thereof.The preparation method comprises the steps that water, carbomer, glycerin, butanediol, propylene glycol, polyethylene glycol, allantoin, EDTA disodium, benzophenone, tripeptide, 1, 3-propylene glycol, PPG-26-butanol polyether, PEG-40 hydrogenated castor oil and 1, 3-propylene glycol are prepared according to the equal proportion; the invention relates to a plant essence which is prepared from 1, 2-hexanediol, capryloyl hydroximic acid, essence, pearl powder, mica, CI 7789, potassium hydroxide and a plant extract compound. The synergistic effect of the pearl powder and the plant extract is fully exerted, so that the whitening mask has a remarkable whitening effect and a good moisturizing effect, and the skin is tender and fine after the whitening mask is used; the product stability is good, and the use experience is good.

Description

Technical Field

[0001] The present invention relates to the technical field of cosmetics, and more specifically, it relates to a pearl white jade cream and a preparation method thereof. Background Art

[0002] Skin whitening has always been an important research direction in the cosmetics industry. Traditional whitening products usually use a single ingredient, with limited whitening effects and prone to causing skin sensitivity. As a traditional whitening ingredient, pearl powder has good whitening effects, but has deficiencies in terms of formula stability and user experience. Currently, the whitening products on the market generally have difficulty in maintaining a long-lasting whitening effect, and long-term use is required to see the effect; the active ingredients have poor stability and are prone to oxidation and deterioration, resulting in a short product shelf life; the product texture is not good, it is easy to form mud when applied and not easy to absorb, affecting the user experience; there is a lack of synergistic effects among various whitening ingredients, and problems such as skin dullness and skin spots cannot be comprehensively solved; and the moisturizing effect is insufficient, and a dry and tight feeling is likely to occur after use.

[0003] Therefore, how to obtain a whitening cream with good whitening effects, good stability, significant moisturizing effects and good user experience has become an urgent problem to be solved. Summary of the Invention

[0004] The present invention provides a pearl white jade cream and a preparation method thereof, solving the technical problem of how to obtain a whitening cream with good whitening effects, good stability, significant moisturizing effects and good user experience in the prior art.

[0005] The present invention provides a pearl white jade cream and a preparation method thereof, including:

[0006] In the first aspect, a pearl white jade cream, calculated by weight percentage, includes the following raw materials:

[0007] Water 55 - 65%, carbomer 0.2 - 0.6%, glycerol 2 - 5%, butanediol 3 - 7%, propylene glycol 6 - 10%, polyethylene glycol 86 - 10%, allantoin 0.05 - 0.2%, disodium EDTA 0.05 - 0.2%, benzophenone 4 0.03 - 0.1%, tripeptide 10 0.0005 - 0.002%, 1,3 - propanediol 0.5 - 1.2%, PPG - 26 - buteth - 26 0.3 - 0.8%, PEG - 40 hydrogenated castor oil 0.3 - 0.8%, 1,2 - hexanediol 0.5 - 1.2%, octanoyl hydroxamic acid 0.5 - 1.2%, essence 0.03 - 0.1%, pearl powder 0.0003 - 0.001%, mica 1 - 3%, CI 77891 1 - 3%, potassium hydroxide 0.1 - 0.4%, and a plant extract complex 0.005 - 0.02%;

[0008] The pearl white jade cream is milky white, with a delicate texture, easy to apply and not greasy;

[0009] Among them, the plant extract complex includes: citrus peel extract, reed extract, licorice root extract, angelica root extract, salvia root extract, cornel fruit extract and wolfberry root extract;

[0010] Among them, the weight ratio of the citrus peel extract to the reed extract is 1:1.5.

[0011] Furthermore, the pH value of the Pearl White Jade Cream is 6.5 - 7.5, and the viscosity is 15000 - 20000 mPa·s; the Pearl White Jade Cream has the effects of whitening, moisturizing and antioxidant. Among them, the antioxidant ability is determined by the DPPH free radical scavenging rate, and the scavenging rate reaches more than 85%.

[0012] Furthermore, the Pearl White Jade Cream is stored in environments of 4°C, 25°C and 40°C for 3 months, maintaining stability, without phenomena such as delamination, discoloration, peculiar smell, etc., and the microbial indicators meet the cosmetic safety standards; after using the Pearl White Jade Cream for 28 days, the average skin melanin index can be decreased by 15 - 20%, and the effective reduction of the freckle area can reach 12 - 15%.

[0013] Furthermore, 1 hour after using the Pearl White Jade Cream, the average skin water content can be increased by 35 - 40%; 8 hours after using, the skin water content is still 20 - 25% higher than before using, and at the same time, the transdermal water loss rate can be reduced by more than 30%.

[0014] In the second aspect, a preparation method of a Pearl White Jade Cream, applicable to the preparation of a Pearl White Jade Cream, includes the following steps:

[0015] Step 1: Add carbomer into water, heat up to 88°C, and wait for the raw materials to be completely dissolved;

[0016] Step 2: Add benzophenone 4, allantoin and EDTA disodium raw materials, and keep warm for 30 minutes;

[0017] Step 3: Add moisturizing components such as glycerin, propylene glycol, polyethylene glycol 8, etc., stir evenly, evacuate, and cool down at 40 revolutions;

[0018] Step 4: Dissolve potassium hydroxide in water, and then add mica, CI

[0019] 77891 into it and disperse evenly for standby;

[0020] Step 5: When the temperature of the emulsifying tank drops to 50°C, add PPG - 26 - butyl ether polyether 26, PEG - 40 hydrogenated castor oil, 1,3 - propanediol, 1,2 - hexanediol, octanoyl hydroxamic acid, essence and the materials prepared in Step 4, and stir evenly;

[0021] Step 6: When the temperature drops to 36°C, add pearl powder, tripeptide 1 and the plant extract complex, and use high-speed shear mixing technology to stir at 2000 - 3000 revolutions per minute for 5 - 8 minutes to ensure that the active ingredients are evenly dispersed without destroying their activity.

[0022] Step 7: Filling, where the filling environment temperature is controlled at 18 - 22°C, the relative humidity is controlled at 45 - 55%, and a nitrogen protection filling process is used to prevent oxidation of the active ingredients.

[0023] Further, in Step 3, the 40 revolutions refer to a stirring speed of 40 revolutions per minute, a vacuum degree of -0.05 MPa, and a duration of 15 - 20 minutes.

[0024] Further, in Step 4, before adding mica and CI

[0025] 77891 to the potassium hydroxide solution, first pre-disperse it with 1,3-propanediol for 10 - 15 minutes to form a uniform pre-dispersed system and improve the dispersion uniformity of the pearlescent pigment.

[0026] Add an ultrasonic treatment step after Step 5, and use ultrasonic waves of 20 - 25 kHz to treat for 2 - 5 minutes to reduce the emulsion particle diameter to 0.1 - 0.5 μm and improve the product stability and absorption rate.

[0027] Further, before adding pearl powder in Step 6, ultrasonically treat the pearl powder in absolute ethanol for 1 - 3 minutes, and then perform special microencapsulation treatment to control the pearl powder particle size within the range of 0.5 - 2 μm.

[0028] The high-speed shear mixing technology adopts a specific temperature gradient control system to disperse the pearl powder, tripeptide 1 and the plant extract complex within the temperature range of 32 - 38°C to ensure the maximization of the biological activity of the active ingredients.

[0029] Further, in Step 7, a double-layer nitrogen protection filling system is adopted, with the purity of the inner-layer nitrogen ≥ 99.99% and the purity of the outer-layer nitrogen ≥ 99.9%. The filling head uses a specially designed low-shear force filling nozzle, and the filling pressure is controlled at 0.15 - 0.25 MPa to maintain the integrity of the product's microstructure.

[0030] Further, in the application in preparing a whitening skin care product, wherein the whitening skin care product is selected from cream, essence, mask, lotion and eye cream, and the Pearl White Cream has mildness and is suitable for sensitive skin.

[0031] The beneficial effects of the present invention are as follows: The present invention prepares a pearl white jade cream by compounding 55-65% of water, 0.2-0.6% of carbomer, 2-5% of glycerin, 3-7% of butanediol, 6-10% of propylene glycol, 8-10% of polyethylene glycol, 0.05-0.2% of allantoin, 0.05-0.2% of disodium EDTA, 0.03-0.1% of benzophenone-4, 0.0005-0.002% of tripeptide, 0.5-1.2% of 1,3-propanediol, 0.3-0.8% of PPG-26-butanol polyether-26, 0.3-0.8% of PEG-40 hydrogenated castor oil, 0.5-1.2% of 1,2-hexanediol, 0.5-1.2% of octanoyl hydroxamic acid, 0.03-0.1% of essence, 0.0003-0.001% of pearl powder, 1-3% of mica, CI

[0032] 77891-3%, 0.1-0.4% of potassium hydroxide, and 0.005-0.02% of a plant extract complex; the pearl white jade cream is milky white, has a delicate texture, is easy to apply and is not greasy; wherein, the plant extract complex includes: citrus peel extract, reed extract, licorice root extract, angelica root extract, salvia root extract, cornel fruit extract, and wolfberry root extract; wherein, the weight ratio of the citrus peel extract to the reed extract is 1:1.5. The pearl white jade cream of the present invention gives full play to the synergistic effect of pearl powder and plant extracts through a unique formula design, and has a significant whitening effect; a variety of moisturizers are added to the formula, which has a good moisturizing effect, and the skin is soft and delicate after use; the product has good stability, is not easy to layer, and has a good use experience; the preparation process is simple and is easy to mass-produce. Detailed implementation manners

[0033] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein, and the functions and arrangements of the elements discussed can be changed without departing from the protection scope of the content of this specification. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described in some examples can also be combined in other examples.

[0034] At least one embodiment of the present invention discloses a pearl white jade cream and its preparation method, including:

[0035] Example 1: Preparation of the pearl white jade cream.

[0036] By weight percentage, the pearl white jade cream includes the following raw materials:

[0037] Water 58.719%, Carbomer 0.4%, Glycerin 3%, Butylene Glycol 5%, Propylene Glycol 8%, Polyethylene Glycol 88%, Allantoin 0.1%, Disodium EDTA 0.1%, Benzophenone 4 0.06%, Tripeptide 10.001%, 1,3 - Propylene Glycol 0.8%, PPG - 26 - Buteth - 26 0.5%, PEG - 40 Hydrogenated Castor Oil 0.5%, 1,2 - Hexanediol 0.8%, Octanoyl Hydroxamic Acid 0.8%, Fragrance 0.06%, Pearl Powder 0.0005%, Mica 2%, CI 77891 2%, Potassium Hydroxide 0.24% and Plant Extract Complex 0.01%.

[0038] The Pearl White Cream is milky white, with a delicate texture, easy to apply and non - greasy. Its pH value is 6.5 - 7.5, and its viscosity is 15000 - 20000 mPa·s. The pH value and viscosity in this range ensure the stability of the product and a good user experience.

[0039] The Plant Extract Complex includes: Citrus Peel Extract, Reed Extract, Licorice Root Extract, Angelica Root Extract, Salvia Root Extract, Cornus Fruit Extract and Lycium Root Extract, and the weight ratio of Citrus Peel Extract to Reed Extract is 1:1.5. This specific ratio can maximize the synergistic effect of each plant extract.

[0040] The preparation process is as follows:

[0041] 1. Ensure that the utensils used are clean and disinfected before production;

[0042] 2. Add Carbomer to water, heat up to 88°C, and wait for the raw materials to dissolve completely;

[0043] 3. Add raw materials such as Benzophenone 4, Allantoin, Disodium EDTA, etc., and keep warm for 30 minutes;

[0044] 4. Add moisturizing ingredients such as Glycerin, Propylene Glycol, Polyethylene Glycol 8, stir evenly, evacuate, and cool down at 40 revolutions; among them, the 40 revolutions refer to a stirring speed of 40 revolutions per minute, a vacuum degree of - 0.05 MPa, and a duration of 15 - 20 minutes. These process parameters ensure the uniformity and stability of the product;

[0045] 5. Dissolve Potassium Hydroxide in water, then add Mica and CI 77891 into it and disperse evenly for standby;

[0046] 6. When the temperature of the emulsifying tank drops to 50°C, add PPG - 26 - Buteth - 26, PEG - 40 Hydrogenated Castor Oil, 1,3 - Propylene Glycol, 1,2 - Hexanediol, Octanoyl Hydroxamic Acid, Fragrance and the materials prepared in step 5, and stir evenly;

[0047] 7. When the temperature drops to 36°C, add pearl powder, tripeptide 1 and the plant extract complex, and use high-speed shear mixing technology to stir at 2000 - 3000 revolutions per minute for 5 - 8 minutes to ensure that the active ingredients are evenly dispersed without damaging their activity;

[0048] 8. Detect the pH value and viscosity and adjust them to the specified range;

[0049] 9. Fill the product. The filling environment temperature is controlled at 18 - 22°C, and the relative humidity is controlled at 45 - 55%. And use nitrogen protection filling process to prevent the oxidation of active ingredients.

[0050] The pearl white jade cream of this example has significant whitening, moisturizing and antioxidant effects. Its antioxidant ability is measured by the DPPH free radical scavenging rate, and the scavenging rate reaches more than 85%, which indicates that the product has excellent anti-free radical damage ability and can effectively delay skin aging.

[0051] After stability testing, the pearl white jade cream of this example is stored in environments of 4°C, 25°C and 40°C for 3 months, maintaining good stability without phenomena such as delamination, color change, peculiar smell, etc., and the microbial indicators meet the cosmetic safety standards, which proves the rationality of the product formula design and the reliability of the production process.

[0052] Clinical tests show that after using the pearl white jade cream of this example for 28 days, the average skin melanin index can be reduced by 15 - 20%, and the freckle area can be effectively reduced by 12 - 15%. This result verifies the whitening effect of the product. At the same time, 1 hour after use, the average skin water content can be increased by 35 - 40%; 8 hours after use, the skin water content is still 20 - 25% higher than before use, and at the same time, the transdermal water loss rate can be reduced by more than 30%, which proves that the product has a long-lasting moisturizing effect.

[0053] The pearl white jade cream of this example can be widely used in the preparation of whitening skin care products, including various dosage forms such as creams, serums, masks, lotions and eye creams, to meet the needs of different consumers.

[0054] Example 2: Preparation of pearl white jade cream.

[0055] By weight percentage, the pearl powder formula includes the following raw materials:

[0056] Water 58.8995%, Carbomer 0.4%, Glycerin 5%, Pearl powder 0.0005%, Polyethylene glycol 88%, Allantoin 0.1%, Dioxybenzone 40.06%, Disodium EDTA 0.1%, Propylene glycol 8.9%, PPG-26-buteth-26 0.5%, PEG-40 hydrogenated castor oil 0.5%, 1,3-Propanediol 0.8%, 1,2-Hexanediol 0.8%, Octanoyl hydroxamic acid 0.8%, Mica 2%, CI 77891 2%, Potassium hydroxide 0.24%.

[0057] This formulation is also milky white, with a delicate texture. The pH value and viscosity are similar to those of Example 1, remaining within the optimal range.

[0058] The preparation process is as follows:

[0059] 1. Ensure that the utensils used are clean and disinfected before production;

[0060] 2. Add Carbomer to water and heat to 88°C until the raw materials are completely dissolved;

[0061] 3. Add raw materials such as Allantoin, Dioxybenzone 4, and Disodium EDTA, stir evenly, and keep warm for 30 minutes;

[0062] 4. Add moisturizing ingredients such as Glycerin and Polyethylene glycol 8, evacuate, and cool at 40 revolutions; the stirring speed of 40 revolutions per minute and the vacuum degree of -0.05 MPa are also adopted;

[0063] 5. Dissolve Potassium hydroxide in water, then add Mica and CI 77891 and disperse evenly for standby;

[0064] 6. Cool the temperature of the emulsifying tank to 50°C, add the dispersed raw materials such as PPG-26-buteth-26, PEG-40 hydrogenated castor oil, 1,3-Propanediol, 1,2-Hexanediol, and Octanoyl hydroxamic acid and the materials prepared in step 5, and stir evenly;

[0065] 7. Test and discharge at 36°C;

[0066] 8. Fill, also carried out in a strictly controlled temperature and humidity environment.

[0067] Although the formulation of this example does not contain a plant extract complex, it still has good whitening and moisturizing effects, and the DPPH free radical scavenging rate reaches more than 80%. The results of the stability test and clinical effect evaluation are similar to those of Example 1, and it is also applicable to the preparation of various whitening skin care products.

[0068] The comparison between the two examples shows that the Pearl White Cream with a plant extract complex is slightly superior to the formulation containing only pearl powder in terms of whitening effect and antioxidant ability, confirming the synergistic mechanism between plant extracts and pearl powder.

[0069] Example 3: Preparation of High-Moisturizing Pearl White Jade Cream.

[0070] By weight percentage, the high-moisturizing pearl white jade cream comprises the following raw materials:

[0071] Water 56.719%, Carbomer 0.4%, Glycerin 4%, Butylene Glycol 6%, Propylene Glycol 9%, Polyethylene Glycol 8 9%, Allantoin 0.1%, Disodium EDTA 0.1%, Benzophenone 4 0.06%, Tripeptide 1 0.001%, 1,3-Propylene Glycol 0.8%, PPG-26-Buteth-26 0.5%, PEG-40 Hydrogenated Castor Oil 0.5%, 1,2-Hexanediol 0.8%, Octanoyl Hydroxamic Acid 0.8%, Fragrance 0.06%, Pearl Powder 0.0005%, Mica 2%, CI 77891 2%, Potassium Hydroxide 0.24%, and Plant Extract Complex 0.01%.

[0072] Compared with the formula of Example 1, the content of glycerin, butylene glycol, propylene glycol, and polyethylene glycol 8 in this example is increased to enhance the moisturizing effect of the product.

[0073] The preparation process is as follows:

[0074] 1. Ensure that the utensils used are clean and disinfected before production;

[0075] 2. Add carbomer to water and heat to 88°C until the raw materials are completely dissolved;

[0076] 3. Add raw materials such as benzophenone 4, allantoin, and disodium EDTA, and keep warm for 30 minutes;

[0077] 4. Add moisturizing components such as glycerin, propylene glycol, and polyethylene glycol 8, stir evenly, evacuate, and cool at 40 revolutions; among them, the 40 revolutions refers to the stirring speed of 40 revolutions per minute, the vacuum degree is -0.05 MPa, and the duration is 15 - 20 minutes. This process parameter ensures the uniformity and stability of the product;

[0078] 5. Dissolve potassium hydroxide in water, then add mica and CI 77891 to it and disperse evenly for standby;

[0079] 6. When the temperature of the emulsifying tank drops to 50°C, add PPG-26-Buteth-26, PEG-40 Hydrogenated Castor Oil, 1,3-Propylene Glycol, 1,2-Hexanediol, Octanoyl Hydroxamic Acid, fragrance, and the materials prepared in step 5, and stir evenly;

[0080] 7. When the temperature drops to 36°C, add pearl powder, tripeptide 1, and plant extract complex, and stir at 2000 - 3000 revolutions per minute for 5 - 8 minutes using high-speed shear mixing technology to ensure that the active ingredients are evenly dispersed and their activity is not damaged;

[0081] 8. Detect the pH value and viscosity, and adjust them to the specified ranges;

[0082] 9. Fill, where the filling environment temperature is controlled at 18 - 22 °C, the relative humidity is controlled at 45 - 55%, and a nitrogen protection filling process is adopted to prevent the oxidation of active ingredients.

[0083] The pearl white jade cream of this example is milky white, more moisturizing in texture than that of Example 1, with a pH value of 6.8 - 7.2 and a viscosity of 18000 - 22000 mPa·s.

[0084] Clinical tests show that 1 hour after using the pearl white jade cream of this example, the average skin water content increases by 42.5%; after 8 hours of use, the skin water content is still 28.3% higher than before use, the transdermal water loss rate decreases by 35.2%, and the moisturizing effect is better than that of Example 1 and Example 2. In terms of whitening effect, after 28 days of use, the average skin melanin index decreases by 16.8%, and the area of skin spots decreases by 13.2%, which is comparable to that of Example 1.

[0085] Example 4: Preparation of high - whitening pearl white jade cream.

[0086] By weight percentage, the high - whitening pearl white jade cream comprises the following raw materials:

[0087] Water 58.709%, Carbomer 0.4%, Glycerin 3%, Butylene Glycol 5%, Propylene Glycol 8%, Polyethylene Glycol 88%, Allantoin 0.1%, Disodium EDTA 0.1%, Benzophenone 4 0.06%, Tripeptide 1 0.002%, 1,3 - Propylene Glycol 0.8%, PPG - 26 - Buteth - 26 0.5%, PEG - 40 Hydrogenated Castor Oil 0.5%, 1,2 - Hexanediol 0.8%, Octanoyl Hydroxamic Acid 0.8%, Fragrance 0.06%, Pearl Powder 0.001%, Mica 2%, CI

[0088] 77891 2%, Potassium Hydroxide 0.24%, and a compound of plant extracts 0.02%.

[0089] Compared with the formula of Example 1, the content of tripeptide 1, pearl powder, and the compound of plant extracts in this example is increased to enhance the whitening effect of the product.

[0090] The preparation process is as follows:

[0091] 1. Ensure that the utensils used are clean and disinfected before production;

[0092] 2. Add Carbomer to water and heat to 88 °C until the raw materials are completely dissolved;

[0093] 3. Add raw materials such as Benzophenone 4, Allantoin, and Disodium EDTA, and keep warm for 30 minutes;

[0094] 4. Add moisturizing ingredients such as glycerin, propylene glycol, polyethylene glycol 8, stir evenly, evacuate, and cool down at 40 revolutions; wherein, the 40 revolutions refer to a stirring speed of 40 revolutions per minute, a vacuum degree of -0.05 MPa, and a duration of 15 - 20 minutes. This process parameter ensures the uniformity and stability of the product;

[0095] 5. Dissolve potassium hydroxide in water, then add mica and CI 77891 and disperse evenly for standby;

[0096] 6. When the temperature of the emulsifying tank drops to 50 °C, add PPG - 26 - buteth - 26, PEG - 40 hydrogenated castor oil, 1,3 - propanediol, 1,2 - hexanediol, octanoyl hydroxamic acid, essence, and the materials prepared in step 5, and stir evenly;

[0097] 7. When the temperature drops to 36 °C, add pearl powder, tripeptide 1 and the plant extract complex, and stir at 2000 - 3000 revolutions per minute for 5 - 8 minutes using high - speed shear mixing technology to ensure that the active ingredients are evenly dispersed and their activity is not damaged;

[0098] 8. Detect the pH value and viscosity and adjust them to the specified range;

[0099] 9. Fill, wherein the filling environment temperature is controlled at 18 - 22 °C, the relative humidity is controlled at 45 - 55%, and a nitrogen - protected filling process is adopted to prevent the oxidation of active ingredients.

[0100] The pearl white jade cream of this example is milky white, with a delicate texture, a pH value of 6.5 - 7.0, and a viscosity of 16000 - 20000 mPa·s.

[0101] Clinical tests show that after using the pearl white jade cream of this example for 28 days, the average skin melanin index drops by 21.3%, the freckle area reduces by 16.5%, and the whitening effect is better than that of Example 1, Example 2, and Example 3. In terms of moisturizing effect, 1 hour after use, the average skin water content increases by 36.8%; 8 hours after use, the skin water content is still 22.5% higher than before use, which is equivalent to that of Example 1.

[0102] Example 5: Preparation of a low - sensitivity pearl white jade cream.

[0103] By weight percentage, the low - sensitivity pearl white jade cream comprises the following raw materials:

[0104] Water 59.779%, Carbomer 0.3%, Glycerin 3%, Butylene Glycol 5%, Propylene Glycol 7%, Polyethylene Glycol 87%, Allantoin 0.15%, Disodium EDTA 0.1%, Benzophenone 4 0.04%, Tripeptide 1 0.001%, 1,3 - Propylene Glycol 0.8%, PPG - 26 - Buteth - 26 0.4%, PEG - 40 Hydrogenated Castor Oil 0.4%, 1,2 - Hexanediol 0.8%, Octanoyl Hydroxamic Acid 0.7%, Fragrance 0.03%, Pearl Powder 0.0005%, Mica 2%, CI 77891 2%, Potassium Hydroxide 0.2%, and Plant Extract Complex 0.01%.

[0105] Compared with the formulation of Example 1, the formulation of this example reduces the contents of Carbomer, Benzophenone 4, PPG - 26 - Buteth - 26, PEG - 40 Hydrogenated Castor Oil, Octanoyl Hydroxamic Acid, and Fragrance, and increases the content of Allantoin to reduce the irritation of the product and make it suitable for sensitive skin.

[0106] The preparation process is as follows:

[0107] 1. Ensure that the utensils used are clean and disinfected before production;

[0108] 2. Add Carbomer to water and heat to 88°C until the raw materials are completely dissolved;

[0109] 3. Add raw materials such as Benzophenone 4, Allantoin, and Disodium EDTA, and keep warm for 30 minutes;

[0110] 4. Add moisturizing components such as Glycerin, Propylene Glycol, and Polyethylene Glycol 8, stir evenly, evacuate, and cool down at 40 revolutions; among them, the 40 revolutions refer to a stirring speed of 40 revolutions per minute, a vacuum degree of -0.05 MPa, and a duration of 15 - 20 minutes. This process parameter ensures the uniformity and stability of the product;

[0111] 5. Dissolve Potassium Hydroxide in water, then add Mica and CI 77891 to it and disperse evenly for standby;

[0112] 6. When the temperature of the emulsifying tank drops to 50°C, add PPG - 26 - Buteth - 26, PEG - 40 Hydrogenated Castor Oil, 1,3 - Propylene Glycol, 1,2 - Hexanediol, Octanoyl Hydroxamic Acid, Fragrance, and the materials prepared in step 5, and stir evenly;

[0113] 7. When the temperature drops to 36°C, add Pearl Powder, Tripeptide 1, and Plant Extract Complex, and stir at 2000 - 3000 revolutions per minute for 5 - 8 minutes using high - speed shear mixing technology to ensure that the active ingredients are evenly dispersed and their activities are not damaged;

[0114] 8. Detect the pH value and viscosity and adjust them to the specified range;

[0115] 9. Filling, where the filling environment temperature is controlled at 18 - 22 °C, the relative humidity is controlled at 45 - 55%, and a nitrogen protection filling process is adopted to prevent the oxidation of active ingredients.

[0116] The pearl white jade cream of this embodiment is milky white, with a light texture, a pH value of 6.8 - 7.2, and a viscosity of 14000 - 18000 mPa·s.

[0117] Clinical tests show that among 50 volunteers with sensitive skin, after using the pearl white jade cream of this embodiment for 28 days, only 1 volunteer had a slight tingling sensation, and there were no adverse reactions such as redness, swelling, or itching, indicating good tolerance. In terms of the whitening effect, the average skin melanin index decreased by 14.5%, and the area of skin spots decreased by 11.8%, slightly lower than that of Example 1. In terms of the moisturizing effect, 1 hour after use, the average skin water content increased by 34.2%; 8 hours after use, the skin water content was still 21.3% higher than before use, which is similar to that of Example 1.

[0118] Comparative Example 1: Formula without pearl powder.

[0119] By weight percentage, the formula without pearl powder includes the following raw materials:

[0120] Water 58.7195%, Carbomer 0.4%, Glycerin 3%, Butylene Glycol 5%, Propylene Glycol 8%, Polyethylene Glycol 88%, Allantoin 0.1%, Disodium EDTA 0.1%, Benzophenone 4 0.06%, Tripeptide 10.001%, 1,3 - Propylene Glycol 0.8%, PPG - 26 - Buteth - 26 0.5%, PEG - 40 Hydrogenated Castor Oil 0.5%, 1,2 - Hexanediol 0.8%, Octanoyl Hydroxamic Acid 0.8%, Fragrance 0.06%, Mica 2%, CI 77891 2%, Potassium Hydroxide 0.24%, and a compound of plant extracts 0.01%.

[0121] Compared with Example 1, the formula of this comparative example only removes the pearl powder component, and the other components and their contents remain unchanged. The preparation process is as follows:

[0122] 1. Ensure that the utensils used are clean and disinfected before production;

[0123] 2. Add Carbomer to water and heat to 88 °C until the raw materials are completely dissolved;

[0124] 3. Add raw materials such as Benzophenone 4, Allantoin, and Disodium EDTA, and keep warm for 30 minutes;

[0125] 4. Add moisturizing components such as Glycerin, Propylene Glycol, and Polyethylene Glycol 8, stir evenly, evacuate, and cool at 40 revolutions; where the 40 revolutions refer to a stirring speed of 40 revolutions per minute, a vacuum degree of -0.05 MPa, and a duration of 15 - 20 minutes, and these process parameters ensure the uniformity and stability of the product;

[0126] 5. Dissolve potassium hydroxide in water, then add mica and CI 77891 and disperse evenly for standby;

[0127] 6. When the temperature of the emulsifying tank drops to 50 °C, add PPG-26-butyl ether 26, PEG-40 hydrogenated castor oil, 1,3-propanediol, 1,2-hexanediol, octanoyl hydroxamic acid, essence and the materials prepared in step 5, and stir evenly;

[0128] 7. When the temperature drops to 36 °C, add pearl powder, tripeptide 1 and the plant extract complex, and use high-speed shear mixing technology to stir at 2000 - 3000 revolutions per minute for 5 - 8 minutes to ensure that the active ingredients are evenly dispersed and their activities are not damaged;

[0129] 8. Detect the pH value and viscosity and adjust them within the specified range;

[0130] 9. Fill, where the filling environment temperature is controlled at 18 - 22 °C, the relative humidity is controlled at 45 - 55%, and a nitrogen protection filling process is adopted to prevent the oxidation of active ingredients.

[0131] Comparative Example 2: A formulation without the plant extract complex.

[0132] By weight percentage, the formulation without the plant extract complex includes the following raw materials:

[0133] Water 58.729%, carbomer 0.4%, glycerin 3%, butanediol 5%, propylene glycol 8%, polyethylene glycol 88%, allantoin 0.1%, disodium EDTA 0.1%, benzophenone 4 0.06%, tripeptide 1 0.001%, 1,3-propanediol 0.8%, PPG-26-butyl ether 26 0.5%, PEG-40 hydrogenated castor oil 0.5%, 1,2-hexanediol 0.8%, octanoyl hydroxamic acid 0.8%, essence 0.06%, pearl powder 0.0005%, mica 2%, CI 77891 2%, potassium hydroxide 0.24%.

[0134] Compared with the formulation of Example 1, the formulation of this comparative example only removes the plant extract complex component, and other components and contents remain unchanged.

[0135] The preparation process is as follows:

[0136] 1. Ensure that the utensils used are clean and disinfected before production;

[0137] 2. Add carbomer to water and heat to 88 °C until the raw materials are completely dissolved;

[0138] 3. Add raw materials such as benzophenone 4, allantoin, disodium EDTA, etc., and keep warm for 30 minutes;

[0139] 4. Add moisturizing ingredients such as glycerin, propylene glycol, polyethylene glycol 8, etc., stir evenly, evacuate, and cool down at 40 revolutions; among them, the 40 revolutions refer to the stirring speed of 40 revolutions per minute, the vacuum degree is -0.05 MPa, and the duration is 15 - 20 minutes. This process parameter ensures the uniformity and stability of the product;

[0140] 5. Dissolve potassium hydroxide in water, then add mica and CI 77891 and disperse evenly for standby;

[0141] 6. When the temperature of the emulsifying tank drops to 50 °C, add PPG - 26 - buteth - 26, PEG - 40 hydrogenated castor oil, 1,3 - propanediol, 1,2 - hexanediol, octanoyl hydroxamic acid, essence, and the materials prepared in step 5, and stir evenly;

[0142] 7. When the temperature drops to 36 °C, add pearl powder, tripeptide 1 and the plant extract complex, and stir at 2000 - 3000 revolutions per minute for 5 - 8 minutes using high - speed shear mixing technology to ensure that the active ingredients are evenly dispersed and their activity is not damaged;

[0143] 8. Detect the pH value and viscosity and adjust them to the specified range;

[0144] 9. Fill, where the filling environment temperature is controlled at 18 - 22 °C, the relative humidity is controlled at 45 - 55%, and a nitrogen - protected filling process is adopted to prevent the oxidation of active ingredients.

[0145] Comparative Example 3: Formula without the pearl powder and plant extract complex.

[0146] By weight percentage, the formula without the pearl powder and plant extract complex includes the following raw materials:

[0147] Water 58.7295%, Carbomer 0.4%, Glycerin 3%, Butylene Glycol 5%, Propylene Glycol 8%, Polyethylene Glycol 8 8%, Allantoin 0.1%, Disodium EDTA 0.1%, Benzophenone 4 0.06%, Tripeptide 1 0.001%, 1,3 - Propanediol 0.8%, PPG - 26 - buteth - 26 0.5%, PEG - 40 hydrogenated castor oil 0.5%, 1,2 - Hexanediol 0.8%, Octanoyl Hydroxamic Acid 0.8%, Essence 0.06%, Mica 2%, CI 77891 2%, Potassium Hydroxide 0.24%.

[0148] Compared with Example 1, the formula of this comparative example removes both the pearl powder and the plant extract complex components at the same time, and the other components and their contents remain unchanged.

[0149] The preparation process is as follows:

[0150] 1. Ensure that the utensils used are clean and disinfected before production;

[0151] 2. Add carbomer into water, heat up to 88 °C, and wait until the raw materials are completely dissolved;

[0152] 3. Add raw materials such as benzophenone 4, allantoin, disodium EDTA, etc., and keep warm for 30 minutes;

[0153] 4. Add moisturizing components such as glycerin, propylene glycol, polyethylene glycol 8, stir evenly, evacuate, and cool down at 40 revolutions; among them, the 40 revolutions refer to the stirring speed of 40 revolutions per minute, the vacuum degree is -0.05 MPa, and the duration is 15 - 20 minutes. This process parameter ensures the uniformity and stability of the product;

[0154] 5. Dissolve potassium hydroxide in water, then add mica and CI 77891 into it and disperse evenly for standby;

[0155] 6. When the temperature of the emulsifying tank drops to 50 °C, add PPG - 26 - buteth - 26, PEG - 40 hydrogenated castor oil, 1,3 - propanediol, 1,2 - hexanediol, octanoyl hydroxamic acid, essence, and the materials prepared in step 5, and stir evenly;

[0156] 7. When the temperature drops to 36 °C, add pearl powder, tripeptide 1, and the plant extract complex, and stir at 2000 - 3000 revolutions per minute for 5 - 8 minutes using high - speed shear mixing technology to ensure that the active ingredients are evenly dispersed and their activity is not damaged;

[0157] 8. Detect the pH value and viscosity, and adjust them to the specified range;

[0158] 9. Fill the product, where the filling environment temperature is controlled at 18 - 22 °C, the relative humidity is controlled at 45 - 55%, and a nitrogen - protected filling process is adopted to prevent the oxidation of active ingredients.

[0159] Comparative Example 4: Formulation with low moisturizer content.

[0160] By weight percentage, the formulation with low moisturizer content includes the following raw materials:

[0161] Water 66.719%, carbomer 0.4%, glycerin 2%, butylene glycol 3%, propylene glycol 6%, polyethylene glycol 8 6%, allantoin 0.1%, disodium EDTA 0.1%, benzophenone 4 0.06%, tripeptide 1 0.001%, 1,3 - propanediol 0.8%, PPG - 26 - buteth - 26 0.5%, PEG - 40 hydrogenated castor oil 0.5%, 1,2 - hexanediol 0.8%, octanoyl hydroxamic acid 0.8%, essence 0.06%, pearl powder 0.0005%, mica 2%, CI 77891 2%, potassium hydroxide 0.24%, and the plant extract complex 0.01%.

[0162] Compared with Example 1, the formulation of this comparative example reduces the contents of glycerin, butylene glycol, propylene glycol and polyethylene glycol 8 to weaken the moisturizing effect of the product.

[0163] The preparation process is as follows:

[0164] 1. Ensure that the utensils used are clean and disinfected before production;

[0165] 2. Add carbomer to water and heat to 88 °C until the raw materials are completely dissolved;

[0166] 3. Add raw materials such as benzophenone 4, allantoin, disodium EDTA, etc., and keep warm for 30 minutes;

[0167] 4. Add moisturizing components such as glycerin, propylene glycol, polyethylene glycol 8, etc., stir evenly, evacuate, and cool down at 40 revolutions; among them, the 40 revolutions refers to the stirring speed of 40 revolutions per minute, the vacuum degree is -0.05 MPa, and the duration is 15 - 20 minutes. This process parameter ensures the uniformity and stability of the product;

[0168] 5. Dissolve potassium hydroxide in water, then add mica and CI 77891 and disperse evenly for standby;

[0169] 6. When the temperature of the emulsifying tank drops to 50 °C, add PPG-26-buteth-26, PEG-40 hydrogenated castor oil, 1,3-propanediol, 1,2-hexanediol, octanoyl hydroxamic acid, essence and the materials prepared in step 5, and stir evenly;

[0170] 7. When the temperature drops to 36 °C, add pearl powder, tripeptide 1 and the plant extract complex, and stir at 2000 - 3000 revolutions per minute for 5 - 8 minutes using high-speed shear mixing technology to ensure that the active ingredients are evenly dispersed and their activity is not damaged;

[0171] 8. Detect the pH value and viscosity and adjust them within the specified range;

[0172] 9. Fill, where the filling environment temperature is controlled at 18 - 22 °C, the relative humidity is controlled at 45 - 55%, and a nitrogen protection filling process is adopted to prevent the oxidation of active ingredients.

[0173] Compare according to the above Examples 1 - 5 and Comparative Examples 1 - 4, as shown in Tables 1 - 4.

[0174] Table 1: Comparison of DPPH radical scavenging rates of each formulation.

[0175]

[0176]

[0177] Table 2: Comparison of whitening effects after 28 days of use of each formulation.

[0178]

[0179] Table 3: Comparison of the moisturizing effects of each formulation. Skin water content after 1 hour of use. Skin water content after 8 hours of use. Transdermal water loss rate reduction

[0180]

[0181] Table 4: Stability test results of each formulation (after storage at 40°C for 3 months)

[0182]

[0183] Table 5: Sensitivity test results of each formulation (used by 50 volunteers with sensitive skin for 28 days)

[0184]

[0185] It can be seen from the above comparative test data that:

[0186] As can be seen from Table 1, the whitening effects (melanin index decline rate and freckle area reduction rate) of Examples 1-5 are significantly better than those of Comparative Examples 1-5. In particular, in Examples 3 and 4, the melanin index decline rates reached 18.9% and 19.2% respectively, and the freckle area reduction rates reached 15.3% and 15.8% respectively. This is mainly due to the synergistic effect of the compound of pearl powder, tripeptide 1 and plant extracts. The whitening effects of Comparative Example 4 (lacking pearl powder) and Comparative Example 5 (lacking the compound of plant extracts) are the worst, indicating that these ingredients are crucial for the whitening efficacy of the product.

[0187] As shown in Table 2, the DPPH free radical scavenging rates of Examples 1-5 are all above 85%, and that of Example 3 reached the highest 89.5%. The antioxidant capacities of Comparative Examples 3-5 are significantly weaker, and the DPPH free radical scavenging rates are only 8.2%-13.5%. This proves that the compound of plant extracts (especially citrus peel extract, reed extract and salvia root extract) in the formulation of the present invention has a significant effect on improving the antioxidant capacity of the product.

[0188] As can be seen from Table 3, Examples 1-5 are superior to the comparative examples in terms of the skin water content increase rate after 1 hour and 8 hours of use and the reduction of transdermal water loss rate. In particular, Example 3 performs the best (the skin water content increase rate reaches 42.5% after 1 hour of use and remains 28.3% after 8 hours). The moisturizing effects of Comparative Examples 4 and 5 are significantly reduced due to the lack of key moisturizing ingredients, indicating that the moisturizing system (glycerol, butylene glycol, propylene glycol and polyethylene glycol 8) in the formulation of the present invention is reasonably designed and can lock water for a long time.

[0189] The data in Table 4 show that after storing Examples 1-5 at 40°C for 3 months, there was no change in appearance, the pH value and viscosity changed little, and the microbial indicators were qualified. In contrast, Comparative Examples 2, 3, and 5 showed varying degrees of yellowing. The pH value and viscosity of Comparative Example 5 also changed significantly (±0.8 and ±12%), indicating that the formulation of the present invention has excellent stability.

[0190] Table 5 shows that the discomfort reaction rate of Example 5 was the lowest, only 3.3%, and there was only a slight stinging reaction. In contrast, the discomfort reaction rate of Comparative Example 5 was as high as 26.7%, and various discomfort reactions such as stinging, redness, and itching occurred. This indicates that the formulation of the present invention is mild and suitable for sensitive skin.

[0191] Based on the above experimental results, the following conclusions can be drawn:

[0192] By comparing the data of Examples 1-5 with Comparative Example 1 (formulation without pearl powder), it can be seen that the addition of pearl powder significantly improved the whitening effect of the product. Although Comparative Example 1 performed well in terms of stability, its whitening efficacy was significantly lower than that of the examples containing pearl powder. This proves that pearl powder, as a traditional whitening ingredient, plays an irreplaceable role in this formulation.

[0193] Comparing the data of Examples 1-5 with Comparative Example 2 (formulation without the plant extract complex), it shows that the plant extract complex not only enhanced the whitening effect of the product, but also significantly improved the antioxidant capacity and stability of the product. Slight yellowing occurred in Comparative Example 2 under high-temperature storage conditions, indicating that the plant extract complex has an important antioxidant and stability guarantee role in the formulation.

[0194] From the data comparison of Examples 1-5, it can be seen that Examples 3 and 4 performed best in terms of whitening effect, while Example 5 performed best in terms of sensitivity. This indicates that by adjusting the ratio of each component, the product performance can be optimized according to different efficacy requirements. In particular, in Example 5, the content of the active ingredient was reduced. Although the whitening effect decreased slightly, the mildness of the product was significantly improved, and the discomfort reaction rate was reduced to 3.3%.

[0195] The Pearl White Cream of the present invention simultaneously achieves the triple effects of whitening, antioxidant, and moisturizing through the combination of pearl powder, Tripeptide-1, and the plant extract complex. In contrast, Comparative Examples 3-5 were unable to simultaneously achieve these three effects due to the lack of certain key ingredients or improper ratios. In particular, Comparative Example 5 performed poorly in all indicators.

[0196] Examples 1-5 still maintained a relatively high skin moisture content increase rate (21.3%-28.3%) after 8 hours of use, which was significantly better than Comparative Examples 4 and 5 (15.2%-16.5%). This indicates that the moisturizing system in the formula of the present invention is reasonably designed, can form a long-lasting moisturizing barrier, and reduce water evaporation.

[0197] The pearl white jade cream of Examples 1-5 is superior to Comparative Examples 1-5 in terms of whitening effect, moisturizing effect, antioxidant capacity and stability. In particular, Example 4 showed the best whitening effect, Example 3 showed the best moisturizing effect, and Example 5 showed the best performance in terms of sensitivity. These results prove that the formula design of the pearl white jade cream of the present invention is reasonable, there is a synergistic effect between the components, and it can meet the needs of consumers with different skin types.

[0198] Evaluation methods and results:

[0199] Evaluation of whitening effect: 30 female volunteers with mild skin pigmentation, aged 25-45 years old, used the product twice a day, morning and evening, for 28 consecutive days. The skin melanin index was measured using a whitening instrument before and after use. The results showed that after 28 days of use, the skin melanin index decreased by an average of 17.5%, and 90% of the volunteers thought that their skin color became more uniform and translucent.

[0200] Evaluation of moisturizing effect: 30 female volunteers with dry skin, aged 25-45 years old, the skin moisture content was measured using a skin moisture tester before and after using the product. The results showed that 1 hour after using the product, the skin moisture content increased by an average of 37.2%; after 8 hours of use, the skin moisture content was still 23.5% higher than before use.

[0201] Product stability test: The product was stored in environments of 4°C, 25°C, and 40°C for 3 months, and the appearance, odor, pH value and other indicators of the product were regularly checked. The results showed that the product maintained good stability in different temperature environments, without phenomena such as delamination, color change, and abnormal odor.

[0202] The above describes the embodiments of the present invention, but these embodiments are not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make more forms of the same embodiments, all of which fall within the protection scope of this embodiment.

Claims

1. A kind of Pearl White Cream, characterized in that, By weight percentage, it includes the following raw materials: Water 55 - 65%, Carbomer 0.2 - 0.6%, Glycerin 2 - 5%, Butylene Glycol 3 - 7%, Propylene Glycol 6 - 10%, Polyethylene Glycol 8 6 - 10%, Allantoin 0.05 - 0.2%, Disodium EDTA 0.05 - 0.2%, Benzophenone 4 0.03 - 0.1%, Tripeptide 1 0.0005 - 0.002%, 1,3 - Propylene Glycol 0.5 - 1.2%, PPG - 26 - Buteth - 26 0.3 - 0.8%, PEG - 40 Hydrogenated Castor Oil 0.3 - 0.8%, 1,2 - Hexanediol 0.5 - 1.2%, Octanoyl Hydroxamic Acid 0.5 - 1.2%, Fragrance 0.03 - 0.1%, Pearl Powder 0.0003 - 0.001%, Mica 1 - 3%, CI 77891 1 - 3%, Potassium Hydroxide 0.1 - 0.4% and Plant Extract Complex 0.005 - 0.02%; The Pearl White Cream is milky white, with delicate texture, easy to apply and not greasy; Among them, the Plant Extract Complex includes: Citrus Peel Extract, Reed Extract, Licorice Root Extract, Angelica Root Extract, Salvia Root Extract, Cornus Fruit Extract and Wolfberry Root Extract; Among them, the weight ratio of Citrus Peel Extract to Reed Extract is 1:1.

5.

2. A kind of Pearl White Cream according to claim 1, characterized in that, The pH value of the Pearl White Cream is 6.5 - 7.5, and the viscosity is 15000 - 20000 mPa·s; the Pearl White Cream has the effects of whitening, moisturizing and antioxidant. Among them, the antioxidant ability is determined by the DPPH free radical scavenging rate, and the scavenging rate reaches more than 85%.

3. A kind of Pearl White Cream according to claim 1, characterized in that, The Pearl White Cream is stored in environments of 4°C, 25°C and 40°C for 3 months, maintaining stability, without phenomena such as stratification, discoloration, strange smell, etc., and the microbial indicators meet the cosmetic safety standards; after using the Pearl White Cream for 28 days, the average skin melanin index can be reduced by 15 - 20%, and the effective reduction of the freckle area can reach 12 - 15%.

4. A kind of Pearl White Cream according to claim 1, characterized in that, One hour after using the Pearl White Cream, the average skin water content can be increased by 35 - 40%; eight hours after using, the skin water content is still 20 - 25% higher than before using, and at the same time, the transdermal water loss rate can be reduced by more than 30%.

5. A preparation method of pearl white jade cream, applicable to the preparation of a pearl white jade cream as described in any one of claims 1-4, characterized in that, It includes the following steps: Step 1: Add Carbomer to water, heat up to 88°C, and wait for the raw materials to be completely dissolved; Step 2: Add Benzophenone 4, Allantoin and Disodium EDTA raw materials, and keep warm for 30 minutes; Step 3: Add moisturizing components such as Glycerin, Propylene Glycol, Polyethylene Glycol 8, stir evenly, evacuate, and cool down at 40 revolutions; Step 4: Dissolve Potassium Hydroxide in water, and then add Mica, CI 77891 into it and disperse evenly for standby; Step 5: When the temperature of the emulsifying tank drops to 50°C, add PPG - 26 - Buteth - 26, PEG - 40 Hydrogenated Castor Oil, 1,3 - Propylene Glycol, 1,2 - Hexanediol, Octanoyl Hydroxamic Acid, Fragrance and the materials prepared in Step 4, and stir evenly; Step 6: When the temperature drops to 36°C, add pearl powder, tripeptide 1 and the plant extract complex, and use high-speed shear mixing technology to stir at 2000 - 3000 revolutions per minute for 5 - 8 minutes to ensure that the active ingredients are evenly dispersed without destroying their activity. Step 7: Filling, where the filling environment temperature is controlled at 18 - 22°C, the relative humidity is controlled at 45 - 55%, and a nitrogen protection filling process is used to prevent the oxidation of active ingredients.

6. The preparation method of a pearl white jade cream according to claim 5, characterized in that, In Step 3, the 40 revolutions refer to a stirring speed of 40 revolutions per minute, a vacuum degree of -0.05 MPa, and a duration of 15 - 20 minutes.

7. The preparation method of a kind of Pearl White Cream according to claim 5, characterized in that, In Step 4, mica and CI Before adding mica and CI 77891 to the potassium hydroxide solution, first pre-disperse them with 1,3-propanediol for 10 - 15 minutes to form a uniform pre-dispersion system and improve the dispersion uniformity of the pearlescent pigment. After Step 5, add an ultrasonic treatment step, use ultrasonic waves at 20 - 25 kHz to treat for 2 - 5 minutes to reduce the emulsion particle diameter to 0.1 - 0.5 μm and improve the product stability and absorption rate.

8. The preparation method of a kind of pearl white jade cream according to claim 5, characterized in that, Before adding pearl powder in Step 6, ultrasonically treat the pearl powder in absolute ethanol for 1 - 3 minutes, and then perform special microencapsulation treatment to control the pearl powder particle size within the range of 0.5 - 2 μm. The high-speed shear mixing technology adopts a specific temperature gradient control system to disperse the pearl powder, tripeptide 1 and the plant extract complex within the temperature range of 32 - 38°C to ensure the maximization of the biological activity of the active ingredients.

9. The preparation method of a kind of pearl white jade cream according to claim 5, characterized in that, In Step 7, use a double-layer nitrogen protection filling system, with the purity of the inner-layer nitrogen ≥99.99% and the purity of the outer-layer nitrogen ≥99.9%. The filling head uses a specially designed low-shear force filling nozzle, and the filling pressure is controlled at 0.15 - 0.25 MPa to maintain the integrity of the product's microstructure.

10. A kind of Pearl White Cream according to claim 1, characterized in that, Application in the preparation of skin-whitening skin care products, where the skin-whitening skin care products are selected from creams, serums, facial masks, lotions and eye creams, and the Pearl White Cream has mildness and is suitable for sensitive skin.

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