Oil dispersion color paste containing fibroin hydrogel, preparation method and application
By using a three-roll milling process to grind silk protein hydrogel with powder particles, a continuous three-dimensional network protective film is formed, which solves the problems of insufficient dispersibility, skin adhesion and makeup holding power of cosmetic powders, and improves the user experience of foundation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- PROYA COSMETICS CO LTD
- Filing Date
- 2026-04-02
- Publication Date
- 2026-06-02
AI Technical Summary
Existing cosmetic powder materials suffer from poor dispersibility, insufficient skin adhesion, and inadequate makeup staying power during use, and current technologies struggle to provide a comprehensive and systematic solution.
Using silk protein hydrogel as a dispersant, it is mixed with powder particles through a three-roll milling process to form a continuous three-dimensional network protective film, which improves the dispersibility and makeup holding power of the powder.
It significantly improves the smoothness, skin adherence, and staying power of foundation. The powder particles are evenly distributed, avoiding caking and powder settling, and enhancing waterproofness and makeup longevity.
Smart Images
Figure CN122123906A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cosmetic raw material technology, and in particular to an oil-dispersible color paste containing silk core protein hydrogel, its preparation method and application. Background Technology
[0002] Cosmetic powders, as an important component of color cosmetics and base makeup products, mainly include inorganic powder materials such as iron oxide, titanium dioxide, mica, and zinc oxide. They are widely used in various cosmetics such as foundation, loose powder, eyeshadow, blush, and sunscreen. These powder materials endow cosmetics with good performance and aesthetic effects by providing coverage, adjusting skin feel, and improving product texture and color.
[0003] However, untreated raw powder particles have a series of inherent defects that directly reduce the user experience of the product: 1) Untreated powder particles are prone to agglomeration and are difficult to disperse evenly in the formula; 2) Insufficient surface smoothness makes it impossible to adhere closely to the skin texture when applied, resulting in poor product fineness and skin adhesion, and easy to cause problems such as caking, powdering, and unnatural makeup effect during use; 3) Poor adhesion between the powder and the skin makes it easy to fall off due to sebum secretion or irregular powder friction, resulting in makeup smudging.
[0004] To address these issues, the cosmetics industry has explored and applied various improvement technologies, which can be mainly categorized into three types:
[0005] 1) Surface modification treatment: By chemically or physically coating the surface of powder particles such as silanization and fatty acid treatment, the van der Waals forces between particles are reduced and agglomeration is prevented, aiming to improve its dispersibility in oil or water phase.
[0006] 2) Particle nano-sizing: Reducing the particle size of powder to the nanoscale increases its specific surface area, which theoretically allows it to be arranged more tightly, thereby improving the skin feel and breathability of the product. However, it also brings potential biosafety risks, such as the skin penetration problem of nanoparticles.
[0007] 3) Add film-forming agents to the formula: Adding film-forming agents (such as PVP and acrylate copolymers) directly to the foundation formula system can "anchor" the powder particles to the skin texture and improve makeup staying power. However, the film formed by existing synthetic film-forming agents has relatively hard physical properties, lacks physiological activity, and has limited biocompatibility with the skin. It is easy to produce a "mask feeling" or cause the film to break and cake due to skin facial expressions.
[0008] It is evident that while existing technologies have improved the performance of cosmetic powders to some extent, they are mostly single-point optimizations and have failed to achieve an organic combination of the powder's delicate skin feel and long-lasting makeup retention derived from the powder's surface. Their mechanisms of action are independent of each other and may even be antagonistic.
[0009] Therefore, there is a need to develop a breakthrough technical solution that systematically addresses multiple issues such as dispersion, skin adhesion, and makeup staying power based on the inherent properties of the material itself.
[0010] Silk core protein, a high-molecular-weight fibrous protein extracted from natural silk (comprising approximately 70%–80% of silk content), offers a novel approach to overcoming the aforementioned technical bottlenecks due to its unique composition and structure. The core advantages of silk core protein are reflected in the following aspects:
[0011] 1) Achieving dynamic biomimetic skin adhesion: The amino acid sequence of silk core protein is mainly composed of alternating glycine and alanine, forming a β-fold core structure; when applied to the powder surface, it can form a flexible, smooth, continuous three-dimensional network protective film. This three-dimensional network film has excellent dynamic elasticity; this biomimetic film can adapt to the slight stretching and contraction of the skin texture and always maintain the 'elastic locking' of the powder particles, thereby significantly improving the makeup holding power while giving the base makeup product an unprecedented sense of breathability and naturalness, avoiding the mask-like feeling of traditional film-forming agents.
[0012] 2) Silk protein contains 18 kinds of amino acids, among which the proportion of hydrophilic amino acids with hydroxyl groups, such as serine and threonine, is extremely high;
[0013] 3) As a protein of pure natural origin, silk protein has excellent biocompatibility and biodegradability, and is gentle and non-irritating to the skin.
[0014] However, traditional processes typically involve directly adding silk protein powder or an aqueous solution. In practical applications, it has been found that:
[0015] 1) Silk core protein dry powder: Due to the extremely high surface energy of the powder and the lack of wetting medium, it is easy to form hard agglomerates, resulting in insufficient fineness and poor stability;
[0016] 2) Silk protein aqueous solution: When silk protein is dissolved into a simple aqueous solution and added, the adsorption layer formed by the silk protein in the aqueous solution on the powder surface is uneven and thin, lacking mechanical strength, and is easily broken under the action of skin oil or sweat. However, high concentration of aqueous solution can easily cause the powder to "clump together", which reduces the dispersion uniformity. Summary of the Invention
[0017] The purpose of this invention is to provide an oil-dispersible color paste containing silk core protein hydrogel, its preparation method, and its application. This invention has the advantages of improving the smoothness, skin adherence, fineness, and makeup-holding power of foundation.
[0018] The technical solution of the present invention:
[0019] 1. An oil-dispersible color paste containing silk protein hydrogel, characterized in that: the oil-dispersible color paste comprises powder, oil, dispersant and silk protein hydrogel; the mass ratio of powder to oil is 1:1 to 7:3, the mass ratio of powder to dispersant is 50:1 to 200:1, and the mass ratio of powder to silk protein hydrogel is 5:1 to 120:1.
[0020] In the aforementioned oil-dispersed color paste containing fibrous protein hydrogel, the fibrous protein hydrogel is a dispersion system with a certain viscosity formed by fibrous protein in water, and its solid content can be adjusted according to actual needs.
[0021] In the aforementioned oil-dispersed color paste containing fibroin hydrogel, the ratio range of powder, oil, and dispersant can ensure sufficient dispersion of powder and good flowability of color paste.
[0022] In the aforementioned oil-dispersible color paste containing fibrous protein hydrogel, the fibrous protein mass concentration of the fibrous protein hydrogel is 0.5% to 2.0%, preferably 2.0%.
[0023] In the aforementioned oil-dispersible pigment containing fibrous protein hydrogel, the molecular weight distribution of fibrous protein in the fibrous protein hydrogel is 20-300 kDa. This range is achieved by preserving the β-sheet structure, optimizing surface activity, and balancing film formation and moisturizing properties.
[0024] In the aforementioned oil-dispersible color paste containing fibrous protein hydrogel, the powder includes at least one or more of inorganic powder, pearlescent powder, and organic powder.
[0025] In the aforementioned oil-dispersible color paste containing silk core protein hydrogel, the inorganic powders include titanium dioxide, zinc oxide, iron oxide, mica, and kaolin; the pearlescent powders include mica and glass beads; and the organic powders include nylon powder and polymethyl methacrylate (PMMA) powder.
[0026] In the aforementioned oil-dispersed pigment paste containing fibroin hydrogel, the oil includes at least one or more of silicone oil, fatty acid ester, hydrocarbon oil, and natural oil.
[0027] In the aforementioned oil-dispersed color paste containing silk core protein hydrogel, the silicone oil includes polydimethylsiloxane and octyl polydimethylsiloxane; the fatty acid esters include caprylic / capric triglyceride and dioctyl carbonate; the hydrocarbon oils include isododecane and squalane; and the natural oils include jojoba oil and meadowfoam seed oil.
[0028] In the aforementioned oil-dispersible pigment paste containing fibrous protein hydrogel, the dispersant includes at least one or more of polymeric dispersants and anionic dispersants.
[0029] In the aforementioned oil-dispersible pigment containing silk core protein hydrogel, the polymeric dispersants include polyhydroxystearic acid and polyglycerol-3 polydimethylsiloxane; the anionic dispersants include monooctyl phosphate and lauryl ether phosphate.
[0030] A method for preparing an oil-dispersible pigment paste containing fibrous protein hydrogel includes the following steps:
[0031] S1. Add the powder to the oil according to the proportion, add the dispersant, stir and mix evenly to obtain a semi-finished product with preliminary dispersion.
[0032] S2. Slowly add the silk core protein hydrogel to the semi-finished product obtained in step S1, and continue stirring until it is evenly mixed to form a mixed color paste containing silk core protein hydrogel.
[0033] S3. The mixed pigment obtained in step S2 is subjected to two three-roll milling processes to obtain the finished oil-dispersed pigment.
[0034] In the aforementioned method for preparing oil-dispersible pigment paste containing fibrous protein hydrogel, steps S1 and S2 can be performed by manual stirring or a stirring disperser, etc., until the mixture is uniform and there are no visible color bands, and the stirring temperature is between 15℃ and 35℃.
[0035] In the aforementioned method for preparing oil-dispersible pigment paste containing fibrous protein hydrogel, the specific details of the two-stage three-roll mill refining process in step S3 are as follows:
[0036] S3.1 Large gap coarse grinding: feed roller gap 20-30µm, discharge roller gap 10-20µm, grinding 2-3 times;
[0037] S3.2 Fine grinding with small gaps: feed roller gap 10-20µm, discharge roller gap 5-10µm, grinding 2-3 times.
[0038] In the aforementioned method for preparing oil-dispersible color paste containing fibroin hydrogel, the mixed color paste containing fibroin hydrogel is subjected to multiple (3-4) cycles of grinding using a three-roll mill. The extreme shear field generated by the micron-level gaps between the rollers completely removes powder agglomerates. Under this instantaneous high pressure, fibroin molecules are forcibly embedded into the gaps between powder particles, forming a steric stabilization effect. This not only achieves ultra-fine dispersion of the powder but also microscopically prevents secondary agglomeration of the powder during subsequent storage, ensuring extremely high fineness of the color paste and a smooth feel during application.
[0039] The application of an oil-dispersed pigment containing fibroin hydrogel in the preparation of liquid foundation, wherein the amount of oil-dispersed pigment added to the liquid foundation is 5% to 30%.
[0040] The aforementioned oil-dispersed pigment paste containing fibroin hydrogel is used in the preparation of liquid foundation. The preparation method of the liquid foundation is as follows:
[0041] A. Add silicone oil, emulsifier, and thickener to the oil phase pot and stir (300-500 rpm) until homogeneous to form oil phase 1;
[0042] B. Add the oil-dispersed pigment containing silk core protein hydrogel to the oil phase 1 obtained in step A, then add other functional powders, and mix at high speed to obtain oil phase 2; the speed of medium-high speed shearing is 2000-3000 rpm, and the time is 5-10 minutes.
[0043] C. Add deionized water, humectant, polyol, preservative, and emulsifying stabilizer to the aqueous phase pot and stir (500-800 rpm) until transparent to form an aqueous phase;
[0044] D. Turn on the homogenizer (3000-4000 rpm) and slowly pour the aqueous phase into the oil phase 2. Homogenize to form a stable finished W / O emulsion. The homogenization speed is 5000-6000 rpm and the time is 3-5 minutes.
[0045] In the aforementioned application of oil-dispersed pigments containing silk-core protein hydrogels in the preparation of liquid foundation, the functional powders include oil-controlling powders and skin-feel-adjusting powders; the oil-controlling powders include silica, zinc oxide, hydroxyapatite, etc.; the skin-feel-adjusting powders include PMMA, boron nitride, cellulose, mica, etc.
[0046] Compared with the prior art, the beneficial effects of this application are as follows:
[0047] 1. Improves the smoothness and skin adhesion of foundation: Silk protein has good skin compatibility and can be evenly distributed on the powder surface. It can be compatible with sebum to fill the gaps in skin texture, significantly improve the feel of powder particles, and make them easier to spread evenly on the skin, thereby improving the smoothness and skin adhesion of foundation.
[0048] 2. Improve powder fineness: The surface of silk protein is rich in hydroxyl, carboxyl and amino groups. The protein is distributed on the surface of powder particles, which effectively prevents powder agglomeration caused by van der Waals forces between particles. This allows the powder to be dispersed more evenly and stably in the formula, resulting in a finer texture of the final product and avoiding powder caking and powder floating when applying makeup.
[0049] 3. Increase the staying power of foundation: Silk protein can form a flexible, smooth, continuous three-dimensional network protective film. This film has dynamic elasticity and can adhere to the skin texture and lock the powder particles, thus giving the powder a long-lasting makeup effect.
[0050] 4. This invention utilizes a fibrous protein aqueous dispersion gel as a functional medium. Due to the amphiphilic structure of fibrous protein molecules, under the high shear force and extrusion stress of a three-roll mill, it can overcome the interfacial tension between the water and oil phases, causing the protein molecular chains in the gel state to undergo directional arrangement and conformational reorganization on the surface of the hydrophobic powder. This mechanochemical-driven process forcibly induces the uniform distribution of fibrous protein on the surface of powder particles, solving the technical bottleneck that hydrophilic proteins are difficult to stably exist in oil dispersion systems in traditional processes.
[0051] In summary, this invention applies the treated oil-dispersed pigment to foundation products, which can improve their multiple properties such as smoothness, skin adherence, fineness, and long-lasting makeup. Attached Figure Description
[0052] Figure 1 This is a process flow diagram of the preparation method of the present invention;
[0053] Figure 2 This is a diagram showing the particle size distribution of Experiment 1 of the present invention; Figure 3 This is a diagram showing the contact angle in Experiment 3 of this invention. Detailed Implementation
[0054] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.
[0055] Example 1.
[0056] An oil-dispersible color paste containing fibroin hydrogel, the components and formulation of which are shown in Table 1.
[0057] A method for preparing an oil-dispersible pigment paste containing fibrous protein hydrogel, such as... Figure 1 As shown, it includes the following steps:
[0058] S1. Add the powder to the oil according to the ratio, add the dispersant, and stir and disperse it using a mechanical mixer (IKA RW 20DIGITAL) at a stirring speed of 800 rpm to obtain a preliminarily dispersed semi-finished product.
[0059] S2. Slowly add the silk core protein hydrogel to the semi-finished product obtained in step S1, and continue stirring until it is evenly mixed to form a mixed color paste containing silk core protein hydrogel.
[0060] S3. The mixed pigment obtained in step S2 is ground three times using a three-roll mill (MTR-50EP) with a feed roller gap of 20µm and an output roller gap of 10µm. Then the feed roller gap is adjusted to 10µm and the output roller gap to 5µm, and the mixture is ground three times to obtain an oil-dispersed pigment containing silk core protein hydrogel.
[0061] A foundation liquid, the specific preparation method of which is as follows:
[0062] A. Mix silicone oil, emulsifier, and thickener according to the corresponding proportions in Table 1 and disperse them by stirring with a mechanical mixer (IKA RW 20DIGITAL) at a speed of 800 rpm to form oil phase 1;
[0063] B. Add the oil-dispersed pigment containing silk core protein hydrogel to the oil phase 1 obtained in step A, then add other functional powders, and mix at high speed to obtain oil phase 2; the speed of medium-high speed shearing is 2000-3000 rpm, and the time is 5-10 minutes.
[0064] C. Mix deionized water, humectant, polyol, preservative, and emulsifying stabilizer evenly to form an aqueous phase;
[0065] D. Slowly pour the aqueous phase into oil phase 2 and homogenize it at 5000 rpm for 3 minutes using a homogenizer (IKAT25 DIGITAL ULTRATURRAX) to form a stable finished W / O emulsion.
[0066] Comparative Example 1. A foundation liquid, the specific ingredients and formulation of which are shown in Comparative Example 1 in Table 1.
[0067] Comparative Example 2. A foundation liquid, the specific ingredients and formulation of which are shown in Comparative Example 2 in Table 1.
[0068] Table 1. Reference table of raw material formulations for Example 1 and Comparative Examples 1-2
[0069]
[0070] Note: The silk-core protein in the table refers to silk-core protein hydrogel, and the silk-core protein content in the silk-core protein hydrogel is 2.0%.
[0071] The color powders described in Examples 1 and Comparative Examples 1-2 above are surface-treated with triethoxyoctylsilane, and can be replaced with one or more of the color powders treated with polydimethylsiloxane, lauroyl lysine, triisostearoyl isopropyl titanate, per(tetrafluorooctyl)triethoxysilane, etc., commonly used in the art; the silicone oil can be replaced with one or more of the linear / branched fatty alcohol fatty acid esters, linear / branched fatty acid polyol esters, isoalkanes, linear / branched fatty alcohol benzoates, linear / branched fatty alcohol salicylate, linear / branched fatty alcohol fruit esters, and fatty acyl amino acid esters commonly used in the art; the emulsifiers, powders, humectants, preservatives, additives, etc., can all be replaced with conventional choices in the art.
[0072] Verification Experiment
[0073] Experiment 1 Secondary Particle Size
[0074] The pigment samples from Example 1 and Comparative Examples 1-2 were diluted with oil, and the particle size and distribution were analyzed using the BT-1600 image particle size and shape analysis system. Three sets of control experiments were conducted, and the average value was taken. The results are shown in Table 2, and the particle size distribution is shown in [Table 2]. Figure 2 .
[0075] Table 2 Results of Secondary Particle Size Test
[0076] D10 (µm) D50 (µm) Example 1 0.473 0.786 Comparative Example 1 0.530 0.813 Comparative Example 2 0.527 0.851
[0077] According to the results in Table 2, the oil-dispersed color paste containing silk core protein hydrogel provided by the three-roll mill refining process of this invention can effectively reduce the D10 and D50 of the powder in the foundation liquid when applied to the foundation liquid. Figure 2 As can be seen from the particle size distribution diagram, the application of the oil-dispersible pigment of the present invention can reduce powder aggregation and result in a smaller overall particle size distribution.
[0078] Experiment 2 Sensory Differences
[0079] Eleven volunteers aged 20-30 were randomly selected. Each volunteer tried both Example 1 and Comparative Examples 1-2 foundation. Volunteers rated the smoothness, adherence to the skin, and fineness of the foundation during application (on a 5-point scale, with higher scores being better), and the average score was taken. The results are shown in Table 3.
[0080] Table 3 Sensory Test Results
[0081] Smoothness Adhesion to skin Fineness Example 1 3.86 3.73 3.59 Comparative Example 1 2.59 2.55 2.55 Comparative Example 2 3.14 3.27 2.95
[0082] As shown in Table 3, the oil-dispersed pigment paste provided by the three-roll mill refining process of this invention, when applied to a foundation liquid composition, can significantly improve the smoothness, skin adhesion, and fineness of the foundation liquid. This effect is consistent with the previous powder dispersion performance test data, indicating that the silk-core protein hydrogel obtained by the three-roll mill refining process can effectively inhibit the aggregation of powder particles, thereby giving the foundation liquid a superior, finer texture.
[0083] Experiment 3 Waterproof performance (contact angle)
[0084] The foundation liquid to be tested was evenly coated onto a standard test substrate. The prepared sample was horizontally fixed on the sample stage. A 5 μL droplet of deionized water was generated above the sample surface using a microsyringe and released slowly and uniformly. The initial contact angle image was acquired after the droplet contacted the surface. Figure 3 The left and right contact angles were calculated using the tangent method, and the average value was taken as the final measurement value. The results are shown in Table 4.
[0085] Table 4 Contact Angle Test Results
[0086] CA perspective Example 1 88.3 Comparative Example 1 96.4 Comparative Example 2 92.4
[0087] As shown in Table 4, the oil-dispersed pigment provided by this invention can effectively improve the water resistance of liquid foundation. Specifically, the silk protein, as a macromolecule, can form a film-like structure, thereby effectively blocking the penetration of water molecules. This technology allows the liquid foundation to maintain its makeup integrity in humid environments or when it comes into contact with water, thus improving its staying power.
[0088] Experiment 4 Anti-migration performance
[0089] Select a 3cm circular test area on the arm and evenly apply 0.04ml of sample. After standing for 5 minutes, completely cover the test area with a 3x3cm square A4 paper, then completely cover the test area with a 200g weight. After standing for 15 seconds, immediately weigh the paper. Perform three control experiments and take the average value. The results are shown in Table 5.
[0090] Table 5. Results of Anti-migration Test
[0091] Foundation migration amount (mg) Example 1 6.466667 Comparative Example 1 11.966667 Comparative Example 2 11.6
[0092] According to the results in Table 5, the migration amount of the foundation liquid in Example 1 was less than that in Comparative Examples 1-2. This indicates that the oil-dispersed pigment provided by the three-roll mill grinding process of the present invention can effectively improve the anti-migration performance of the foundation liquid. The network structure formed by the silk core protein macromolecules can effectively anchor the pigments and effectively inhibit powder migration, thereby improving the makeup holding effect of the foundation liquid.
[0093] In summary, the oil-dispersed pigment paste containing silk core protein hydrogel obtained by the three-roll mill refining process of this invention can improve the smoothness of foundation application when applied to liquid foundation products. Due to the help of silk core protein in dispersing pigments, the above-mentioned liquid foundation also has better fineness and skin adhesion. In addition, as a macromolecule, silk core protein can form a film structure, increasing the waterproofness and makeup-holding performance of the liquid foundation.
[0094] In summary, the silk core protein hydrogel oil-dispersed pigment paste provided by the three-roll mill refining process of this invention exhibits multiple synergistic technical effects in foundation liquid compositions;
[0095] First, the silk protein effectively improves the dispersion of pigments through its excellent powder dispersion, thereby significantly enhancing the smoothness, fineness, and skin adhesion of the foundation.
[0096] Secondly, as a macromolecular polymer, silk protein can form a continuous and dense film structure during the film-forming process of foundation. This structure not only enhances the waterproof performance of the foundation, but also improves its staying power.
Claims
1. An oil-dispersible pigment containing fibroin hydrogel, characterized in that: The oil-dispersible pigment paste comprises powder, oil, dispersant, and silk protein hydrogel; the mass ratio of powder to oil is 1:1 to 7:3, the mass ratio of powder to dispersant is 50:1 to 200:1, and the mass ratio of powder to silk protein hydrogel is 5:1 to 120:
1.
2. The oil-dispersible pigment paste containing fibroin hydrogel according to claim 1, characterized in that: The silk core protein hydrogel has a silk core protein concentration of 0.5% to 2.0%.
3. The oil-dispersible pigment paste containing fibroin hydrogel according to claim 1, characterized in that: The molecular weight distribution of the fibroin in the fibroin hydrogel is 20–300 kDa.
4. The oil-dispersible pigment paste containing fibroin hydrogel according to claim 1, characterized in that: The powder includes at least one or more of inorganic powder, pearlescent powder, and organic powder.
5. The oil-dispersible pigment paste containing fibroin hydrogel according to claim 1, characterized in that: The oils and fats include at least one or more of silicone oils, fatty acid esters, hydrocarbon oils and fats, and natural oils and fats.
6. The oil-dispersible pigment paste containing fibroin hydrogel according to claim 1, characterized in that: The dispersant includes at least one or more of polymeric dispersants and anionic dispersants.
7. The method for preparing oil-dispersible pigment paste according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Add the powder to the oil according to the proportion, add the dispersant, stir and mix evenly to obtain a semi-finished product with preliminary dispersion. S2. Slowly add the silk core protein hydrogel to the semi-finished product obtained in step S1, and continue stirring until it is evenly mixed to form a mixed color paste containing silk core protein hydrogel. S3. The mixed pigment obtained in step S2 is subjected to two three-roll milling processes to obtain the finished oil-dispersed pigment.
8. The method for preparing an oil-dispersible pigment paste containing fibrous protein hydrogel according to claim 7, characterized in that, The specific details of the two-stage three-roll mill pulping process described in step S3 are as follows: S3.1 Large gap coarse grinding: feed roller gap 20-30µm, discharge roller gap 10-20µm, grinding 2-3 times; S3.2 Fine grinding with small gaps: feed roller gap 10-20µm, discharge roller gap 5-10µm, grinding 2-3 times.
9. The application of the oil-dispersed pigment paste according to any one of claims 1-6 in the preparation of foundation liquid, characterized in that: The oil-dispersed pigment in the foundation liquid has a mass percentage of 5% to 30%.
10. The application of the oil-dispersed pigment containing fibrous protein hydrogel according to claim 9 in the preparation of foundation liquid, characterized in that, The foundation liquid is prepared as follows: A. Mix silicone oil, emulsifier, and thickener evenly to form oil phase 1; B. Add the oil-dispersed pigment containing silk core protein hydrogel to the oil phase 1 obtained in step A, then add other functional powders, and mix at high speed to obtain oil phase 2; the speed of medium-high speed shearing is 2000-3000 rpm, and the time is 5-10 minutes. C. Mix deionized water, humectant, polyol, preservative, and emulsifying stabilizer evenly to form an aqueous phase; D. Slowly pour the aqueous phase into oil phase 2 and homogenize to form a stable finished W / O emulsion; the homogenization speed is 5000-6000 rpm and the time is 3-5 minutes.