CN110302064B

CN110302064B - Whitening and moisturizing essence and whitening and moisturizing mask prepared from same

Info

Publication number: CN110302064B
Application number: CN201910682774.XA
Authority: CN
Inventors: 索晋玄
Original assignee: Jiaxing Yan Muscle Grass Biotechnology Co ltd
Current assignee: Guangdong Lingkang Daily Necessities Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2022-06-07
Anticipated expiration: 2039-07-26
Also published as: CN110302064A

Abstract

The invention relates to a whitening and moisturizing essence and a whitening and moisturizing mask prepared from the same, and belongs to the technical field of cosmetics. The whitening and moisturizing essence consists of the following raw materials in percentage by mass: 5-15% of natural plant extract, 5-10% of glycerol, 2-5% of sodium hyaluronate, 5-7% of nicotinamide, 2-4% of hydroxyethyl cellulose, 0.4-0.6% of p-hydroxyacetophenone, 0.5-1% of polyacrylic acid, 0.05-0.1% of citric acid, 0.1-0.5% of hydrogenated castor oil and the balance of deionized water, wherein the total mass percentage of the raw materials is 100%; the natural plant is selected from one or more of herba Adonidis, herba Centellae, Prunellae Spica leaf, Tremella and flos Rosae Davuricae. Can effectively reduce the irritation of the melanin whitening component (nicotinamide) to the skin, simultaneously improves the proper use concentration of the nicotinamide, and plays a role in synergistic whitening.

Description

Whitening and moisturizing essence and whitening and moisturizing mask prepared from same

Technical Field

The invention relates to a mask, in particular to a whitening and moisturizing essence and a whitening and moisturizing mask prepared from the same, and belongs to the technical field of cosmetics.

Background

With the development of the times, more and more women do not choose to adopt whitening products with shielding effects such as foundation make-up, whitening cream and the like to achieve the effect of whitening skin, but pursue natural, healthy, uniform, white and pure skin colors. The essence containing the whitening components is added into the essence of the facial mask, so that the facial mask has the effect of isolating the contact between the facial skin and the air, and the essence containing the whitening components can effectively permeate into the skin epidermis, so that the deep moisturizing and whitening effects are achieved. Therefore, the mask product with the whitening effect is always a popular product on the market.

At present, the mask products with whitening effect are declared to be thousands of in the market, but the product quality is different, the quality of the products is varied, the fish and the dragon are mixed, in order to achieve the whitening effect of the products, heavy metal components or harmful chemical or hormone components are added by some manufacturers, and the products can damage and irritate the facial skin after long-term use, so that the skin damage which is difficult to recover is caused.

Disclosure of Invention

The invention aims to provide a whitening and moisturizing essence, the essence components of which can effectively reduce the irritation of melanin whitening components (such as nicotinamide) to skin and improve the appropriate use concentration of the nicotinamide, and meanwhile, the extracted natural plant extract essence and other effective whitening components (such as the nicotinamide) have the synergistic whitening effect.

The invention also provides a safe whitening and moisturizing facial mask with good whitening and moisturizing effects, and the facial mask adopts the whitening and moisturizing essence as a mask solution.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the whitening and moisturizing essence consists of the following raw materials in percentage by mass: 5-15% of natural plant extract, 5-10% of glycerol, 2-5% of sodium hyaluronate, 5-7% of nicotinamide, 2-4% of hydroxyethyl cellulose, 0.4-0.6% of p-hydroxyacetophenone, 0.5-1% of polyacrylic acid, 0.05-0.1% of citric acid, 0.1-0.5% of hydrogenated castor oil and the balance of deionized water, wherein the total mass percentage of the raw materials is 100%; the natural plant is selected from one or more of herba Adonidis, herba Centellae, Prunellae Spica leaf, Tremella and flos Rosae Davuricae.

Snow lotus herb is mainly distributed in northwest high and cold mountainous regions, is a high-efficiency medicinal plant, is rich in alkaloid, flavone, sterol, volatile oil, polysaccharide, sixteen kinds of amino acid, snow lotus lactone and the like, and has the effects of resisting inflammation, repairing tissues and resisting oxide free radicals;

the prunella vulgaris is a perennial herb medicinal plant, is rich in active skin beautifying components such as prunella vulgaris glycoside, B vitamins, niacin, vitamin C and the like, can promote skin blood microcirculation, accelerate skin cell regeneration, fully relax skin pores, and has good effects on removing skin toxins and grease. The tremella fuciformis sporocarp is rich in polysaccharide, has a strong moisturizing and water locking function, and can improve the moisture of the horny layer to make the skin softer and more elastic;

the rosa damascena, also called rosa damascena, is rich in rose polysaccharide and multiple trace elements, and can inhibit tyrosinase in the melanin generation process, so that the rosa damascena has the effect of assisting whitening; centella asiatica is a medicinal herb plant with the effects of clearing heat, promoting diuresis, relieving swelling and detoxifying, and has remarkable effects of promoting skin collagen regeneration, accelerating blood microcirculation, improving acne skin, tightening skin, delaying skin aging and repairing damaged skin after sunburn.

Nicotinamide, a derivative of vitamin B3, is most stable in solutions at pH 6. Because of its extremely low molecular weight, it can penetrate into the deep part of skin quickly through horny layer, reduce the melanin produced and deposited, block its transfer to surface layer cell, accelerate cell metabolism and accelerate the desquamation of melanin horny cell. Theoretically, the higher the concentration of niacinamide is, the better the whitening effect is, but products with more than 3% concentration of niacinamide all have the problems of being easy to generate irritation to human skin and intolerance to skin.

Preferably, the natural plant is prepared from the following raw materials in parts by weight: 10-40 parts of snow lotus herb, 10-40 parts of centella, 10-30 parts of selfheal leaf, 10-30 parts of tremella and 10-30 parts of rosa damascena.

Preferably, the preparation method of the natural plant extract comprises the following steps: mixing the raw materials of the natural plants according to a proportion, washing and drying after ultraviolet sterilization, grinding and crushing, taking the weight ratio of ethanol/butanediol of 3/(3-7) as an extracting agent, carrying out cyclic extraction for 3-4 hours under the protection of carbon dioxide gas at the extraction temperature of 45-75 ℃ and the extraction pressure of 30-40 MPa, filtering the obtained filtrate after extraction and separation, then carrying out reduced pressure distillation and concentration on the filtered filtrate, and finally preparing the natural plant extract.

The preparation method of the whitening and moisturizing essence comprises the following steps:

1) preparation of natural plant extract

Mixing snow lotus herb, centella asiatica, selfheal leaves, tremella and rosa damascena in proportion, washing, drying, grinding and crushing after ultraviolet sterilization, taking the weight ratio of ethanol to butanediol of 3/(3-7) as an extracting agent, extracting at the temperature of 45-75 ℃ and under the extraction pressure of 30-40 MPa, circularly extracting for 3-4 hours under the protection of carbon dioxide gas, filtering the filtrate obtained after extraction and separation, then carrying out reduced pressure distillation and concentration on the filtered filtrate, and finally preparing a natural plant extract;

2) preparation of essence

Under the constant temperature condition of 60-75 ℃, a homogenizing stirrer is adopted for stirring, the natural plant extract, the glycerol, the sodium hyaluronate, the nicotinamide, the hydroxyethyl cellulose, the polyacrylic acid, the hydrogenated castor oil and the p-hydroxyacetophenone are sequentially and slowly added into the deionized water according to the set mass ratio for stirring for 2-3h, then the citric acid is added, the stirring is continued, the heat preservation and the standing are carried out for 1-1.5h, and finally the mixed solution is cooled to the room temperature to obtain the whitening and moisturizing essence.

Preferably, the reduced pressure distillation temperature in the step 1) is controlled to be 60-70 ℃, and the pressure is 1-1.5 kPa.

Preferably, the rotation speed of the stirrer in the step 2) is 3000-.

The whitening and moisturizing mask consists of mask fabrics and the whitening and moisturizing essence.

Preferably, the mask fabric base cloth is selected from pure cotton fiber, eucalyptus fiber non-woven fabric or superfine fiber, tencel fiber and alginate fiber non-woven fabric.

Preferably, the mask base material non-woven fabric is treated by a special spunlace process, wherein the special spunlace process is to adopt a combination of plane spunlace reinforcement and drum spunlace reinforcement to carry out spunlace reinforcement on the base fabric in the spunlace reinforcement process. It is further preferred that the hydroentangling process be conducted in a first and second drum hydroentangling and a third planar hydroentangling.

Compared with common non-woven fabric spunlace reinforcement, the method adopts a special spunlace reinforcement process, the porosity of the base fabric is higher, and under the comparison of the same area, more uniform oxygen channels are possessed, the air permeability is an important index for determining the comfort level of the mask, the air permeability is good, and the skin affinity of the mask is better.

Compared with the prior art, the invention has the beneficial effects that:

(1) the mask base cloth made of eucalyptus fiber is preferably adopted, a special spunlace process is adopted, and particularly, a combination mode of plane spunlace reinforcement and drum spunlace reinforcement is adopted for spunlace reinforcement of the base cloth, so that the mask base cloth has more uniform oxygen channels and better skin-friendly feeling than common non-woven fabrics under the condition of same area contrast, and essence in the mask can be better absorbed by skin;

(2) besides the moisturizing and whitening effects of natural plant essence, the problem of intolerance of high nicotinamide concentration can be relieved, the nicotinamide concentration is added by 6%, the intolerance of test people is avoided, and the like, so that the appropriate use concentration of nicotinamide is improved, and the synergistic whitening effect is achieved;

(3) the facial mask essence prepared by reasonably selecting and matching various safe moisturizing components (such as micromolecular sodium hyaluronate (hyaluronic acid)) and matching various natural plant extracted whitening and moisturizing essences is safe and has no irritation to skin, not only has the whitening and moisturizing effects, but also can effectively promote skin metabolism, increase skin elasticity and delay aging after long-term use.

Drawings

FIG. 1 is a graph of the moisture retention of the serum made according to various embodiments of the present invention over time;

FIG. 2 is a graph showing the variation of tyrosinase inhibition in accordance with various embodiments of the present invention;

FIG. 3 is a graph showing the effect of different test samples on the inhibition rate of tyrosinase activity.

Detailed Description

The technical solution of the present invention will be further specifically described below by way of specific examples. It is to be understood that the practice of the invention is not limited to the following examples, and that any variations and/or modifications may be made thereto without departing from the scope of the invention.

In the present invention, all parts and percentages are by weight, unless otherwise specified, and the equipment and materials used are commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified.

Example 1

The preparation method of the whitening and moisturizing essence comprises the following specific steps:

(1) taking natural plants (snow lotus herb, centella asiatica, selfheal leaves, tremella and rosa damascena) which are washed and dried after ultraviolet sterilization, crushing and sieving (the mesh number of a screen is 40 meshes), taking the weight ratio of ethanol/butanediol (3/7) as an extracting agent, extracting at 45 ℃ and under 30MPa, circularly extracting for 3h under the protection of carbon dioxide gas, filtering the filtrate obtained after extraction and separation, then carrying out reduced pressure distillation and concentration (the reduced pressure distillation temperature is controlled at 55 ℃, and the reduced pressure is 1kPa) on the filtered filtrate for 2h, and finally preparing the natural plant extract.

The natural plant extract comprises the following raw materials: 30g of snow lotus herb, 30g of centella asiatica, 20g of selfheal leaf, 20g of tremella and 10g of rosa damascena.

(2) Stirring with homogenizing mixer at constant temperature (60 deg.C), mixing natural plant extractive solution, glycerol, sodium hyaluronate, nicotinamide, hydroxyethyl cellulose, polyacrylic acid, the whitening and moisturizing essence comprises hydrogenated castor oil and p-hydroxyacetophenone, wherein the raw materials comprise 8g of natural plant extract, 8g of glycerol, 3g of sodium hyaluronate, 5g of nicotinamide, 2g of hydroxyethyl cellulose, 1g of polyacrylic acid, 0.5g of hydrogenated castor oil and 0.6g of p-hydroxyacetophenone, the natural plant extract, the nicotinamide and the hydroxyethyl cellulose are sequentially and slowly added into deionized water (the mass ratio of the deionized water is 71.8g), the mixture is stirred for 2 hours (the rotating speed of a stirrer is 3000 plus materials and 5000rpm/min) under the stirring action of a homogenizing stirrer, finally citric acid (the mass ratio of the citric acid is 0.1g) is added, the mixture is continuously stirred for 0.5 hour in a homogenizing way, the heat preservation and the standing are carried out for 1 hour, and finally the mixed solution is cooled to the room temperature to obtain the whitening and moisturizing essence.

Example 2

(1) taking natural plants (snow lotus herb, centella asiatica, selfheal leaves, tremella and rosa damascena) which are washed and dried after ultraviolet sterilization, crushing and sieving the natural plants (the number of meshes of a screen is 40), taking the weight ratio of ethanol to butanediol (3/5) as an extracting agent, extracting at 55 ℃ and under the extraction pressure of 35MPa, circularly extracting for 3.5 hours under the protection of carbon dioxide gas, filtering the filtrate obtained after extraction and separation, and then carrying out reduced pressure distillation and concentration on the filtered filtrate (the reduced pressure distillation temperature is controlled at 60 ℃ and the pressure is 1.2kPa) for 2 hours to finally obtain the natural plant extract.

The natural plant extract comprises the following raw materials: 25g of snow lotus herb, 25g of centella asiatica, 30g of selfheal leaf, 10g of tremella and 10g of rosa damascena.

(2) Under the condition of constant temperature (65 ℃), a homogenizing mixer is adopted for stirring, natural plant extract liquor, glycerin, sodium hyaluronate, nicotinamide, hydroxyethyl cellulose, polyacrylic acid, hydrogenated castor oil and p-hydroxyacetophenone are sequentially and slowly added into deionized water (the mass ratio of the deionized water is 69.75g) according to the raw material ratio, the mixture is stirred for 2 hours (the rotating speed of the mixer is 3000-plus 5000rpm/min), citric acid (the mass ratio of the citric acid is 0.05g) is added, the mixture is continuously homogenized and stirred for 0.5 hour, then the mixture is kept warm and kept stand for 1 hour, and finally the mixture is cooled to the room temperature for standby.

Example 3

(1) taking natural plants (snow lotus herb, centella asiatica, selfheal leaves, tremella and rosa damascena) which are washed and dried after ultraviolet sterilization, crushing and sieving (the mesh number of a screen is 40 meshes), taking the weight ratio of ethanol/butanediol (3/6) as an extracting agent, extracting at 65 ℃ and under 40MPa in a circulating manner under the protection of carbon dioxide gas for 4 hours, filtering the filtrate obtained after extraction and separation, then carrying out reduced pressure distillation and concentration (the reduced pressure distillation temperature is controlled at 65 ℃, and the pressure is 1.5kPa) on the filtered filtrate for 2 hours, and finally preparing the natural plant extract.

The natural plant extract comprises the following raw materials: 20g of snow lotus herb, 20g of centella asiatica, 30g of selfheal leaf, 20g of tremella and 10g of rosa damascena.

(2) Under the condition of constant temperature (70 ℃), stirring by using a homogenizing mixer, slowly adding natural plant extract, glycerin, sodium hyaluronate, nicotinamide, hydroxyethyl cellulose, polyacrylic acid, hydrogenated castor oil and p-hydroxyacetophenone (wherein the raw material ratio is that 12g of natural plant extract, 5g of glycerin, 5g of sodium hyaluronate, 7g of nicotinamide, 4g of hydroxyethyl cellulose, 0.8g of polyacrylic acid, 0.4g of hydrogenated castor oil and 0.6g of p-hydroxyacetophenone) into deionized water in sequence (the mass ratio of the deionized water is 65.1g), stirring for 2h (the rotating speed of the mixer is 3000-plus 5000rpm/min) by using the homogenizing mixer, finally adding citric acid (the mass ratio of the citric acid is 0.1g), continuing homogenizing and stirring for 0.5h, then keeping the temperature and standing for 1h, and finally cooling the mixed solution to room temperature for later use.

Example 4

(1) taking natural plants (snow lotus herb, centella asiatica, selfheal leaves, tremella and rosa damascena) which are washed and dried after ultraviolet sterilization, crushing and sieving (the mesh number of a screen is 40 meshes), taking the weight ratio of ethanol/butanediol (3/7) as an extracting agent, extracting at 75 ℃ and under 40MPa in a circulating manner under the protection of carbon dioxide gas for 3 hours, filtering the filtrate obtained after extraction and separation, then carrying out reduced pressure distillation and concentration (the reduced pressure distillation temperature is controlled at 70 ℃, and the pressure is 1.5kPa) on the filtered filtrate for 2 hours, and finally preparing the natural plant extract.

The natural plant extract comprises the following raw materials: 40g of snow lotus herb, 30g of centella asiatica, 10g of selfheal leaf, 10g of tremella and 10g of rosa damascena.

(2) Under the condition of constant temperature (70 ℃), stirring by using a homogenizing mixer, slowly adding 15g of natural plant extract, 8g of glycerol, 5g of sodium hyaluronate, 7g of nicotinamide, 4g of hydroxyethyl cellulose, 1g of polyacrylic acid, 0.5g of hydrogenated castor oil and 0.6g of p-hydroxyacetophenone into deionized water in sequence (the mass ratio of the deionized water is 58.8g), stirring by using the homogenizing mixer for 2 hours (the rotating speed of the mixer is 3000 and 5000rpm/min), finally adding citric acid (the mass ratio of the citric acid is 0.1g), continuing to stir uniformly for 0.5 hour, preserving heat, standing for 1 hour, and finally cooling the mixed solution to room temperature for later use.

Example 5

The whitening and moisturizing mask consists of a mask fabric and the whitening and moisturizing essence prepared by the method, wherein a mask fabric base cloth is made of natural fiber (such as pure cotton fiber and eucalyptus fiber) non-woven fabric or synthetic fiber (such as superfine fiber, tencel, alginate fiber and the like) non-woven fabric, in order to obtain a mask cloth with permeability and conformability, the adopted mask base material non-woven fabric needs to be treated by a special spunlace process, the special spunlace process refers to the spunlace reinforcement of the base cloth by adopting a mode of combining plane spunlace reinforcement and drum spunlace reinforcement in the spunlace reinforcement process, and the specific preferred implementation mode is that the first and second spunlace reinforcement is performed by a drum spunlace reinforcement, and the third spunlace reinforcement is performed by a plane spunlace reinforcement.

Example 6 moisturizing Performance test of whitening and moisturizing formula with Natural plant extract

The essences prepared in examples 1, 2, 3 and 4 were respectively subjected to a moisturizing performance test with a glycerin aqueous solution (glycerin content 10%, control).

The test method comprises the steps of weighing 10g of the essence and 10g of the glycerol aqueous solution respectively at room temperature, placing 5 groups of weighing dishes in a constant-temperature and constant-humidity box, preventing the opening (the constant-temperature and constant-humidity condition is that the temperature is 22 ℃ and the relative humidity is 40%), placing for 4 hours, 8 hours, 12 hours, 24 hours, 36 hours, 48 hours, 60 hours and 72 hours, taking out the weighing dishes, weighing, and calculating the moisture retention rate.

Moisture retention rate of m/m₀X 100% (in the formula, m)₀The total mass of the sample and the weighing vessel before the sample is placed in the constant temperature and humidity box, and the total mass of the sample and the weighing vessel after the constant temperature and humidity box is placed for a certain time).

The test results are shown in FIG. 1. As can be seen from fig. 1, examples 1, 2, 3 and 4, to which natural plant extract essence and various nutrient components are added, have good moisturizing performance, and after 72 hours, each example is more than 50% and is obviously superior to the moisturizing rate of glycerin aqueous solution, and the moisturizing performance is higher as the addition amount of the natural plant extract essence is larger.

Example 7 example 1 example 2 example 3 example 4 inhibition of tyrosinase Activity assay

1. Preparation of sample solution

The essences prepared in examples 1, 2, 3 and 4 and arbutin (positive control) were respectively prepared into test sample solutions with concentrations of 0.2mg/L,0.4mg/L,0.6mg/L,0.8mg/L and 1mg/L with DMSO (dimethyl sulfoxide).

2. Determination of tyrosinase inhibition

Accurately weighing the prepared sample solution, a standard phosphate buffer solution (the pH value is 6.8), an L-tyrosine solution (the concentration is 2.0mmol/L) and a tyrosinase solution (the concentration is 50U/ml) according to the dosage of the reagents in the following table 1, uniformly mixing the sample solution, the standard phosphate buffer solution and the tyrosinase solution, keeping the temperature of the mixture at the constant temperature of 37 ℃ for 10 minutes, adding the tyrosinase solution, uniformly mixing the mixture in the constant temperature water bath for 10 minutes, and testing the absorbance of each group of solution at 490 nm. The amount of tyrosinase inhibition assay reagents used is shown in Table 1.

TABLE 1 tyrosinase inhibitory Rate determination reagent dosage Scale

(Note: A1, A2, B1, B2 are all absorbance values measured)

The tyrosinase inhibition rate was calculated as (1- (B1-B2)/(a1-a2)) × 100%.

3. Effect of the examples of the present invention on the inhibition Rate of tyrosinase Activity

The tyrosinase inhibition rates are shown in figure 2, and as can be seen from figure 2, the addition of the essences containing the natural plant extract in different concentrations has a good inhibition effect on the tyrosinase activity, and has a good whitening effect, the tyrosinase inhibition rates are correspondingly increased along with the increase of the concentrations of the four examples, and when the concentration of example 4 is 1.0mmol/L, the tyrosinase inhibition rates are very close to those of arbutin, a positive control sample, on the tyrosinase activity.

Example 8 synergistic whitening effect of adding Natural plant extract and Nicotinamide

The essence prepared in example 2 and

comparative samples

1, 2, 3 and 4 were subjected to irritation test and moisturizing test,

wherein: the comparative sample 1 is not added with the natural plant extract, and the dosage of other test materials and the test method are the same as those of the example 2;

the comparative sample 2 is not added with the natural plant extract, the concentration of nicotinamide is changed to 4 percent, and the dosage of other test materials and the test method are the same as those of the example 2;

the comparative sample 3 is not added with the natural plant extract, the concentration of nicotinamide is changed to 2%, and the dosage of other test materials and the test method are the same as those of the example 2;

comparative sample 4, the concentration of niacinamide was changed to 8% and the amounts of other test materials and test methods were the same as in example 2.

1. Irritation test

100 test volunteers (50 men and women) are selected and divided into 5 groups (one group for every 20 persons), facial masks (facial mask cloth is made of non-woven fabric or eucalyptus fiber) made of the essence of the embodiment 2, the essence of the comparative sample 1, the essence of the comparative sample 2, the essence of the comparative sample 3 and the essence of the comparative sample 4 are tried respectively, 1 facial mask is tried every two days, and the facial masks are tried for two weeks continuously. The test results are shown in Table 2.

TABLE 2

As can be seen from table 2, most people have intolerance to the nicotinamide essence added with high concentration without adding the natural plant extract essence of the present invention, and the skin has stabbing pain and swelling, and when the concentration of nicotinamide is reduced to 2%, most people feel comfortable, but the synergistic whitening effect of the nicotinamide with too low concentration is also greatly reduced; after the natural plant extract essence is added, when the concentration of the nicotinamide is changed to 8%, 3 people can generate slight irritation, and 1 person can generate severe allergic irritation symptoms, so that the concentration of the nicotinamide is not suitable to be too high.

2. Whitening synergistic effect test of natural plant extract and nicotinamide

The test method is the same as that of the tyrosinase activity inhibition test of the whitening and moisturizing formula obtained in example 7 after the natural plant extract is added, and the influence curve of different test samples on the tyrosinase activity inhibition rate is shown in fig. 3.

As can be seen from fig. 3, the natural plant extract essence and the nicotinamide of the invention have a synergistic whitening effect, the inhibition rate of the nicotinamide-containing essence on tyrosinase decreases with the decrease of the concentration of the nicotinamide without adding the natural plant extract essence, the whitening effect decreases, and the inhibition rate on tyrosinase increases with the increase of the concentration of the nicotinamide.

Test results show that the natural plant extract essence and the nicotinamide have a synergistic whitening effect, and the essence of the added natural plants (snow lotus herb, centella asiatica, selfheal leaves, tremella and rosa damascena) has the advantages of good allergy relief and stimulation reduction on the nicotinamide and improvement on the usable concentration of the nicotinamide.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims

1. The whitening and moisturizing essence is characterized in that: the whitening and moisturizing essence consists of the following raw materials in percentage by mass: 5-15% of natural plant extract, 5-10% of glycerol, 2-5% of sodium hyaluronate, 5-7% of nicotinamide, 2-4% of hydroxyethyl cellulose, 0.4-0.6% of p-hydroxyacetophenone, 0.5-1% of polyacrylic acid, 0.05-0.1% of citric acid, 0.1-0.5% of hydrogenated castor oil and the balance of deionized water, wherein the total mass percentage of the raw materials is 100%;

the natural plant is composed of the following raw materials in parts by weight: 10-40 parts of snow lotus herb, 10-40 parts of centella, 10-30 parts of selfheal leaf, 10-30 parts of tremella and 10-30 parts of rosa damascena;

the preparation method of the natural plant extract comprises the following steps: mixing the raw materials of the natural plants according to a proportion, washing and drying after ultraviolet sterilization, grinding and crushing, taking the weight ratio of ethanol/butanediol = 3/(3-7) as an extracting agent, carrying out cyclic extraction for 3-4 hours under the protection of carbon dioxide gas at the extraction temperature of 45-75 ℃ and the extraction pressure of 30-40 MPa, filtering the obtained filtrate after extraction and separation, then carrying out reduced pressure distillation and concentration on the filtered filtrate, and finally preparing the natural plant extract.

2. A preparation method of the whitening and moisturizing essence of claim 1, characterized by comprising the following steps:

1) preparation of natural plant extractive solution

Mixing snow lotus herb, centella asiatica, selfheal leaves, tremella and rosa damascena in proportion, washing, drying, grinding and crushing after ultraviolet sterilization, taking the weight ratio of ethanol/butanediol = 3/(3-7) as an extracting agent, extracting at the temperature of 45-75 ℃ and under the extraction pressure of 30-40 MPa, circularly extracting for 3-4 hours under the protection of carbon dioxide gas, filtering the filtrate obtained after extraction and separation, then carrying out reduced pressure distillation and concentration on the filtered filtrate, and finally preparing a natural plant extract;

2) preparation of essence

Under the constant temperature condition of 60-75 ℃, a homogenizing mixer is adopted for stirring, the natural plant extract, the glycerol, the sodium hyaluronate, the nicotinamide, the hydroxyethyl cellulose, the polyacrylic acid, the hydrogenated castor oil and the p-hydroxyacetophenone are sequentially and slowly added into the deionized water according to the set mass ratio and stirred for 2-3h, then the citric acid is added, the stirring is continued, the heat preservation and the standing are carried out for 1-1.5h, and finally the mixed solution is cooled to the room temperature to obtain the whitening essence.

3. The preparation method of the whitening and moisturizing essence according to claim 2, characterized by comprising the following steps: in the step 1), the reduced pressure distillation temperature is controlled to be 60-70 ℃, and the pressure is 1-1.5 kPa.

4. The preparation method of the whitening and moisturizing essence according to claim 2, characterized by comprising the following steps: the rotating speed of the stirrer in the step 2) is 3000-.

5. A whitening and moisturizing mask is characterized in that: the facial mask consists of facial mask fabrics and the whitening and moisturizing essence of claim 1.

6. The whitening and moisturizing mask as claimed in claim 5, wherein: the base cloth of the facial mask fabric is selected from pure cotton fiber, eucalyptus fiber non-woven fabric or superfine fiber, tencel fiber and alginate fiber non-woven fabric.

7. The whitening and moisturizing mask as claimed in claim 5, wherein: the mask base material non-woven fabric is treated by a special spunlace process, wherein the special spunlace process is to adopt a mode of combining plane spunlace reinforcement and drum spunlace reinforcement to carry out spunlace reinforcement on the base fabric in the spunlace reinforcement process.

8. The whitening and moisturizing mask as claimed in claim 7, wherein: in the process of the spunlace reinforcement, the first and second spunlace reinforcements are drum spunlace reinforcements, and the third spunlace reinforcement is planar spunlace reinforcement.