A complementary dyeing shampoo composition, its preparation and use

Abstract

The application discloses a complementary dyeing shampoo composition and a preparation method and application thereof, and relates to the technical field of daily chemical products.The complementary dyeing shampoo composition is composed of the following components in percentage by weight: 14-20% of a surfactant, 0.1-0.5% of a cationic conditioning agent, 0.05-2% of a complementary pigment, 0.05-2.5% of a suspension stabilizer, 0.2-2.0% of a silicone oil, 0.5-3% of a pH regulator, and the rest is deionized water.The complementary dyeing shampoo composition can realize efficient and uniform deposition of the pigment in a coexisting system of an anionic surfactant and a cationic conditioning agent, and has good system stability and hair care effect.

Description

Technical Field

[0001] This invention relates to the field of daily chemical product technology, and in particular to a color-correcting shampoo composition, its preparation method, and its application. Background Technology

[0002] Color-correcting shampoos are functional hair care products that can simultaneously replenish color, slow down fading, and maintain the vibrancy of dyed hair during daily shampooing. These products allow consumers to replenish, correct, or maintain their hair color during regular shampooing, and are especially suitable for those experiencing color fading after dyeing, covering gray hair, or seeking fashionable hair colors.

[0003] Currently, there are some published documents in the prior art involving color-correcting or dyeing shampoo compositions. For example, CN116531268A discloses a single-agent sulfate-free shampoo for color correction after dyeing, which uses a variety of different surfactants plus direct dye components as color-correcting ingredients to achieve color correction while washing hair; this patent uses a "sulfate-free" system, which is mild, but has the following shortcomings: (1) The formulation cost of the sulfate-free system is expensive, which is not conducive to the popularization of the product; (2) The cleaning power of the sulfate-free system is generally weaker than that of the sulfate-containing system. For consumers who frequently use styling products or have excessive sebum secretion, it may be difficult to thoroughly clean the scalp and hair. Residual oil or styling products may hinder the adhesion of dye and affect the color correction effect; (3) This patent does not solve the adverse effect of the coexistence of anionic surfactants and cationic conditioners on the dye deposition efficiency. For example, CN 105168016 B discloses a hair dye that increases the penetration of direct dye into the hair through organic solvents, and uses polymeric resin to form a water-resistant film on the hair surface to protect the dye from being washed away by shampoo, effectively improving the color fastness of the hair dye. However, this patent relies on organic solvents to promote dye penetration, but high levels of organic solvents may cause irritation or sensitization to the scalp, which does not conform to the current development trend of "green, mild, and low-irritation" in the cosmetics industry. Although the water-resistant film formed by polymeric resin on the hair surface can improve color fastness, long-term accumulation of resin will cause the hair to feel stiff, heavy, and lack volume. This patented technology is essentially a hair dye, rather than a shampoo product with a cleaning function. Its usage is similar to traditional hair dyes, which cannot meet consumers' convenient need to touch up the color simultaneously during "daily shampooing". For example, JP 6827161 B2 discloses a gel-like hair dyeing shampoo composition, which focuses on solving the problems of "non-drip" and good viscosity stability of the product. However, this patent is limited to the gel form, which limits the application scenarios and market adaptability of the product. In addition, this patent focuses on viscosity stability and preventing dripping, but does not conduct in-depth research on the cleaning performance of surfactants, the dye deposition promoting effect of cationic conditioners, and the uniformity and durability of color matching effect.

[0004] In summary, existing technologies lack a color-correcting composition that can achieve efficient pigment deposition in a system where anionic surfactants and cationic conditioning agents coexist, while ensuring stable suspension of large-particle-size silicone oil and providing hair care effects simultaneously. Furthermore, existing technologies do not reveal a technical solution to address these challenges through the synergistic effect of xanthan gum of a specific molecular weight, silicone oil of a specific particle size, and cationic conditioning agents with a specific nitrogen content.

[0005] Therefore, developing a shampoo product that can evenly, lastingly, and gently restore color, and is adaptable to various formulations, has significant market value. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art. This invention aims to provide a color-correcting composition, its preparation method, and its uses that can achieve efficient and uniform pigment deposition in a system where anionic surfactants and cationic conditioning agents coexist, while having good system stability, hair care effects, and reduced damage to hair.

[0007] Specifically, the following technical contradictions exist in the existing technology: (1) The contradiction between product physical stability and dyeing uniformity: Existing color-correcting shampoo products have added a lot of conditioning agents, which are prone to stability problems such as turbidity, precipitation and layering during long-term storage, resulting in uneven color correction. (2) It is difficult to achieve both cleanliness and efficient color correction: Anionic surfactants, cationic conditioning agents and color correction pigments can easily form insoluble complexes in conventional shampoo systems, leading to system instability. At the same time, they hinder the effective deposition of acid dyes and make it difficult to achieve hair care effects. This is a problem that existing technologies have not been able to solve. (3) It is difficult to achieve both color correction and effective hair care: The addition of silicone oil will further seal the surface of the hair strands, hindering the penetration of pigments, resulting in uneven color correction and difficulty in achieving both color correction and hair care effects. Therefore, the technical problem to be solved by the present invention is, on the one hand, to provide a complementary color dyeing composition that can simultaneously achieve efficient and uniform deposition of complementary color pigments, has hair care effect and is stable in system; on the other hand, the present invention aims to provide the above-mentioned complementary color dyeing shampoo composition for multi-scenario applications in shampoo products.

[0008] To address the aforementioned technical problems, the present invention provides the following technical solutions.

[0009] A color-correcting shampoo composition is provided, comprising the following components by weight percentage: The surfactant is 14-20%, wherein the surfactant is a mixture of sodium lauryl ether sulfate and cocamidopropyl betaine, and the mass ratio of sodium lauryl ether sulfate to cocamidopropyl betaine is (3-10):1, wherein the sodium lauryl ether sulfate comprises a mixture of ethylene oxide addition numbers of 1 and 2. The cationic conditioner is 0.1-0.5%, wherein the cationic conditioner is selected from at least one of polyquaternium-10 and guar hydroxypropyltrimethylammonium chloride, wherein the nitrogen content of polyquaternium-10 is 0.8-2.2%, and the nitrogen content of guar hydroxypropyltrimethylammonium chloride is 1.1-1.9%; The complementary color pigment is 0.05-2%, wherein the complementary color pigment is a water-soluble acid dye and contains at least one sulfonic acid group; The suspension stabilizer is 0.05-2.5%, wherein the suspension stabilizer is a mixture of hydroxyethyl cellulose and xanthan gum, and the mass ratio of hydroxyethyl cellulose to xanthan gum is (1-5):1, wherein the weight average molecular weight Mw of xanthan gum is 3.5 million Da to 5 million Da. 0.2-2.0% silicone oil, wherein the silicone oil is polydimethylsiloxane, the internal phase viscosity is 500,000 to 1,500,000 cst, and it is added in the form of an emulsion, wherein the volume average particle size D50 of the silicone oil dispersed phase in the emulsion is 20-30 μm; A pH adjuster of 0.5-3% is used to adjust the pH of the composition to 3.0-5.0; The remainder is deionized water.

[0010] Furthermore, the color-correcting shampoo composition of the present invention also includes other components; said other components include one or more of humectants, preservatives, chelating agents, and fragrances.

[0011] Preferably, it comprises the following components in weight percentage: surfactant 14-18%; cationic conditioner 0.17-0.3%; complementary pigment 0.14-0.25%; suspension stabilizer 0.4-2.0%; silicone oil 0.3-0.9%; pH adjuster 1.7-2.2%; and the balance being deionized water.

[0012] Preferably, the mass ratio of sodium lauryl ether sulfate to cocamidopropyl betaine is (3-8):1.

[0013] Preferably, the nitrogen content of the polyquaternium-10 is 0.8-2.0%, and the nitrogen content of the guar hydroxypropyltrimethylammonium chloride is 1.3-1.6%.

[0014] Preferably, the mass ratio of hydroxyethyl cellulose to xanthan gum is (1-4):1, and the weight-average molecular weight (Mw) of xanthan gum is 3.5 million Da to 4.8 million Da.

[0015] Preferably, the internal phase viscosity of the silicone oil is 500,000 to 1,200,000 cst, and the volume average particle size D50 of the silicone oil dispersed phase in the emulsion is 22-28 μm.

[0016] Preferably, the pH adjuster is a combination of at least one of citric acid, lactic acid, succinic acid, and salicylic acid with sodium hydroxide.

[0017] Preferably, the water-soluble acid dye has a molecular weight of 300 to 800.

[0018] The preparation method of the color-correcting shampoo composition of the present invention includes the following steps: 1) Disperse the suspension stabilizer in a portion of deionized water, heat to 55-60℃ to dissolve; then cool to below 40℃, add complementary color pigment and mix well to obtain the first mixture; 2) Dissolve the cationic conditioner in the remaining deionized water to obtain a second mixture; 3) Add the surfactant to the second mixture, stir and heat to 75-80℃ until completely dissolved, then stir and cool to below 40℃; then add the first mixture from step 1) and stir to mix evenly; 4) Add pH adjuster to adjust the pH of the material obtained in step 3) to 3.0-5.0, then add silicone oil and stir continuously until evenly mixed to obtain the color-correcting shampoo composition.

[0019] In some specific embodiments, the preparation method of the color-correcting shampoo composition of the present invention is as follows: S1. Weigh all raw materials; S2. Oil phase pot: Add some deionized water to the oil phase pot, add the suspension stabilizer under stirring, stir quickly and disperse evenly, then heat to 55-60℃, stir quickly until the raw material is completely dissolved, cool down to below 40℃, then add the complementary color pigment, stir evenly, and set aside. S3. Aqueous phase pot: Add the remaining deionized water to the aqueous phase pot, add the cationic conditioner under stirring until it is completely dissolved and there are no insoluble substances, and then transfer it to the emulsification pot. S4. Emulsifying pot: Add surfactant, heat to 75-80℃ while stirring, and stir until completely dissolved; while stirring, cool down to below 40℃, and pump the oil phase from step S2 into the emulsifying pot, and continue stirring until uniform; S5. Adjust the pH of the mixture obtained in step S4 to 3.0-5.0 using a pH adjuster, then add silicone oil and stir continuously until homogeneous; add the appropriate excipients according to the target dosage form and mix evenly to obtain the final product.

[0020] As a preferred technical solution, in step S5, adding the corresponding excipients according to the target dosage form specifically involves: When preparing foam or mousse-type products, a propellant is added and the product is filled. When preparing gel or emulsion forms, adjust the proportion of suspension stabilizer.

[0021] The preparation method provided by this invention is the preferred method recommended by the inventors. Other preparation methods known to those skilled in the art can also be applied to this invention, and all can achieve the inventive effects described herein.

[0022] This invention also provides the use of the color-correcting shampoo composition in the preparation of hair care products, which are used to maintain dyed hair color, cover new gray hair, or brighten natural hair color. Specifically, the color-correcting shampoo composition of this invention can be formulated into any physical form commonly found in shampoo products, including but not limited to foam, mousse, gel, or emulsion types, according to conventional preparation techniques in the art. The conversion between these physical forms (such as adding thickeners to form a gel, using a foaming pump head to form a foam, adding propellants to form a mousse, etc.) does not change the core composition of the composition and is a conventional choice for those skilled in the art, requiring no inventive effort. Therefore, for the sake of brevity, the specific embodiments section of this specification only provides examples and comparative examples in gel / emulsion form, but this should not be construed as any limitation on the scope of protection of the physical form of this invention.

[0023] Compared with the prior art, the complementary color dyeing composition provided by the present invention has the following three core beneficial effects, which are achieved through specific component synergistic mechanisms.

[0024] 1) This invention solves the problems of composition stability and dyeing uniformity: Conventional suspension systems struggle to stabilize large-particle-size silicone oil emulsions (20-30 μm) in systems with high concentrations of anionic surfactants. This invention utilizes a compound system of xanthan gum and hydroxyethyl cellulose with specific molecular weights to form a unique three-dimensional gel network structure within a complex system. This network structure generates sufficient yield stress to suspend and stabilize the large-particle-size silicone oil emulsion; furthermore, it anchors acidic dyes through hydrogen bonds, preventing their aggregation and removal during washing. During shampooing, the network structure is reversibly disrupted, resulting in uniform dye release and achieving uniform dyeing.

[0025] 2) Achieves highly efficient and uniform color-restoring effect with the coexistence of anionic surfactants and cationic conditioners: This invention uses cocamidopropyl betaine to competitively complex anionic surfactants, protecting the cationic conditioners from binding, and ensuring stable coexistence of all components during storage. During shampooing, the competitive protection disappears, and the cationic conditioners, due to their cationic properties, strongly adsorb onto the negatively charged damaged hair surface on one hand, and capture negatively charged color-restoring pigment molecules through electrostatic bridging on the other hand, thereby forming a strong "pigment-cationic polymer-hair" ternary composite film in situ on the hair surface. This overcomes the problems of easy pigment aggregation and easy washing out, achieving a gradual, uniform, and rinse-resistant excellent color-restoring effect, which constitutes the inventive core of this invention.

[0026] 3) Solves the technical challenge of the contradiction between hair care and color matching uniformity: The surfactant sodium lauryl ether sulfate and cocamidopropyl betaine are compounded in a certain proportion, which enables the product to quickly form a uniform and extremely thin liquid film on the hair surface, providing an interface for ion locking between the cationic conditioner and the pigment, thus avoiding the dead corners in coloring or color matching caused by product agglomeration from the source; The large particle size and high internal phase viscosity of the silicone oil selected in this invention are highly matched with the size of the gaps and surface micropores of the damaged hair cuticles. During the shampooing process, the complex formed by the pigment-cationic polymer preferentially deposits on the hair layer. The silicone oil exhibits a "delayed release" characteristic and can precisely deposit and fill the gaps and defects in the hair cuticle, achieving "instant physical repair," improving the smoothness and shine of the hair, and further enhancing the aesthetics after touch-up coloring. On the other hand, the silicone oil fills the defects in the hair cuticle, reducing the loss of pigment from the hair and indirectly enhancing color fastness. The silicone oil of this invention solves the problems of dryness and frizz that are often associated with traditional hair dyeing products, enabling the product of this invention to achieve a high degree of unity in touch-up coloring and repair. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 Images of hair treated with the shampoo product of Example 1 under a scanning electron microscope.

[0029] Figure 2 Images of hair treated with the shampoo product of Example 2 under a scanning electron microscope.

[0030] Figure 3Images of hair treated with the shampoo product of Example 3 under a scanning electron microscope.

[0031] Figure 4 Images of hair treated with the shampoo product of Example 4 under a scanning electron microscope.

[0032] Figure 5 Images of hair treated with the shampoo product of Example 5 under a scanning electron microscope.

[0033] Figure 6 The image shows hair treated with the shampoo product of Comparative Example 1 under a scanning electron microscope.

[0034] Figure 7 Images of hair treated with the shampoo product of Comparative Example 2 under a scanning electron microscope.

[0035] Figure 8 Images of hair treated with the shampoo product of Comparative Example 3 under a scanning electron microscope.

[0036] Figure 9 Images of hair treated with the shampoo product of Comparative Example 4 under a scanning electron microscope.

[0037] Figure 10 Images of hair treated with the shampoo product of Comparative Example 5 under a scanning electron microscope.

[0038] Figure 11 Images of hair treated with the shampoo product of Comparative Example 6 under a scanning electron microscope.

[0039] Figure 12 Images of hair treated with the shampoo product of Comparative Example 7 under a scanning electron microscope.

[0040] Figure 13 Images of hair treated with the shampoo product of Comparative Example 8 under a scanning electron microscope.

[0041] Figure 14 Images of hair treated with the shampoo product of Comparative Example 9 under a scanning electron microscope. Detailed Implementation

[0042] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0044] This invention provides a color-correcting shampoo composition. This composition not only has excellent color-correcting capabilities but also, while cleansing the hair, gently and evenly neutralizes and fills in color gaps caused by fading through electrostatic adsorption and slow pigment release, achieving a gradual and long-lasting color-correcting effect while effectively repairing the hair. This product is suitable for individuals who need to maintain their dyed hair color, cover new gray hair, or brighten their natural hair color.

[0045] The color-correcting shampoo composition of the present invention comprises the following essential components: Surfactant: The content of surfactant is 14-20% by weight of the total composition, preferably 14-18%. The surfactant is sodium lauryl ether sulfate (containing 1 EO and 2 EO chains) and cocamidopropyl betaine, with a mass ratio of sodium lauryl ether sulfate to cocamidopropyl betaine of (3-10):1. Preferably, the mass ratio of sodium lauryl ether sulfate to cocamidopropyl betaine is (3-8):1. In this invention, the surfactants sodium lauryl ether sulfate and cocamidopropyl betaine are compounded in a certain proportion to achieve a precise competitive complexation balance: cocamidopropyl betaine preferentially forms a complex with the anionic surfactant, protecting the cationic conditioner from the "attack" of the anionic surfactant, keeping the cationic conditioner in a dissolved state during storage, and preventing premature complexation with the pigment. During the shampooing process, the product can quickly form a uniform, extremely thin liquid film on the hair surface, providing an interface for ion locking between the cationic conditioner and the pigment, thus avoiding the dyeing or touch-up dead spots caused by product agglomeration from the source.

[0046] Cationic conditioning agent: its content is 0.1-0.5% based on the total mass of the composition, preferably 0.17-0.3%; the cationic conditioning agent is at least one of polyquaternium-10 and guar hydroxypropyltrimethylammonium chloride. The nitrogen content of polyquaternium-10 is 0.8-2.2%; the nitrogen content of guar hydroxypropyltrimethylammonium chloride is 1.1-1.9%. The cationic conditioning agent of this invention carries a strong positive charge. On the one hand, it strongly electro-adsorbs onto the negatively charged hair surface, repairing damaged hair and making the hair surface smoother and flatter. This makes the pigment layer adsorbed on the hair surface reflect more evenly, visually enhancing the uniformity and gloss of the color. On the other hand, it can also combine with negatively charged acidic dye molecules through ionic interactions to form a thin film of a "pigment-cationic polymer" complex on the hair surface. The pigment is between the cationic polymer and the hair surface, or is integrated into the three-dimensional network structure of the suspension stabilizer. This is equivalent to constructing an in-situ generated pigment layer on the hair that is not easily washed away.

[0047] Complementary pigment: its content is 0.05-2% based on the total mass of the composition, preferably 0.14-0.25%; the complementary pigment is an acid dye with a molecular weight of 300 to 800 and is a water-soluble acid dye containing at least one sulfonic acid group; the color of the dye can be used alone or in combination according to the complementary color requirements; the primary function of the acid dye of the present invention is to provide excellent water solubility and color brightness, and to serve as a "target" for subsequent steps, and its uniform dispersion is the basis for accurate coloring. Acidic dyes that comply with cosmetic regulations can be selected, such as Acid Orange 7 (CI 15510), Acid Black 1 (CI 20470), Acid Violet 43 (CI 60730), Acid Green 25 (CI 61570), Acid Red 88 (CI 15620), Acid Orange 10 (CI 16230), Acid Blue 62 (CI 62045), Food Yellow 4 (CI 19140), Food Blue 2 (CI 42090), Food Red 12 (CI 17200), Food Blue 1 (CI 73015), etc., and mixtures thereof in different proportions, to formulate a variety of target hair colors (such as black, brown, burgundy, chestnut brown, etc.).

[0048] Suspension stabilizer: its content is 0.05-2.5% based on the total mass of the composition, preferably 0.4-2.0%; the suspension stabilizer is hydroxyethyl cellulose and xanthan gum, and the mass ratio of hydroxyethyl cellulose to xanthan gum is (1-5):1, wherein the weight average molecular weight Mw of xanthan gum is between 3.5 million Da and 5 million Da; when xanthan gum of a specific molecular weight is compounded with hydroxyethyl cellulose in a certain mass ratio, the double helix structure of xanthan gum interacts with hydroxyethyl cellulose through hydrogen bonds to form a three-dimensional network structure. The three-dimensional network structure "locks" the cationic conditioner within its structure through steric hindrance, delaying its contact with the anionic surfactant. Simultaneously, the system's pH range of 3.0-5.0 maintains a moderate charge density for the cationic conditioner, preventing excessive complexation. Furthermore, this three-dimensional network structure provides yield stress to stabilize the silicone oil while "anchoring" the pigment within the network, preventing localized pigment aggregation. During shampooing, the three-dimensional network structure is disrupted, releasing the pigment and cationic conditioner to form a pigment-cationic conditioner complex that is uniformly adsorbed onto the hair surface. The "gradual" dissociation of the three-dimensional network structure during dilution ensures controllable pigment release, preventing excessive localized deposition caused by a single, complete release of pigment during rinsing.

[0049] Silicone oil: its content is 0.2-2.0% based on the total mass of the composition, preferably 0.3-0.9%; the silicone oil is polydimethylsiloxane, its internal phase viscosity is 500,000 to 1,500,000 cst, and the silicone oil emulsion particle size is 20-30 μm; the silicone oil particle size range in this invention is highly matched with the gap of the raised hair cuticles and the size of the surface micropores. During the shampooing process, in the initial dilution stage, the large particle size and high internal viscosity of the silicone oil emulsion make it difficult to spread on the hair surface. At this time, the pigment and cationic conditioning agent complex can fully contact and adhere to the hair. In the later rinsing stage, the silicone oil emulsion breaks down and precisely deposits and fills the gaps and defects in the hair cuticles, and deposits on the outer layer of the hair that has absorbed the pigment. Since the pigment deposition is complete, the silicone oil deposition will not peel off or hinder the dye. On the other hand, the silicone oil forms a smooth film on the outer layer of the hair, improving the smoothness and shine of the hair, further enhancing the aesthetics after touch-up coloring. Furthermore, the silicone oil fills the defects in the hair cuticles, reducing the loss of pigment from the hair and indirectly enhancing color fastness. The silicone oil of this invention solves the problems of dryness and frizz that are often associated with traditional hair dyeing products, enabling the product of this invention to achieve a high degree of unity in touch-up coloring and hair care.

[0050] pH adjuster: The content of the pH adjuster is 0.5-3% based on the total mass of the composition, preferably 1.7-2.2%; the pH adjuster is at least two or more of citric acid, lactic acid, succinic acid, salicylic acid and sodium hydroxide, used to adjust the pH of the shampoo to 3.0-5.0; this pH range is crucial for the color development and fixation of acidic dyes, reducing hair damage in alkaline environments, and maintaining a healthy scalp environment.

[0051] Balance: Primarily composed of deionized water, and may contain additives conventional in the art, such as chelating agents, humectants, fragrances, preservatives, etc. The amounts of these optional ingredients should comply with cosmetic regulations and should not affect the main effects of the invention.

[0052] The compositions of the present invention can be formulated into any physical form in shampoo products, which is achieved by adjusting the proportions of surfactants, suspending stabilizers, cationic conditioners, etc., in the formulation. These physical forms include, but are not limited to, foam, mousse, gel, or emulsion types.

[0053] Preparation method: The composition of the present invention can be prepared by the conventional cold mixing method or hot mixing method in the art.

[0054] The preparation steps of the shampoo products in the following examples and comparative examples are as follows: S1. Weigh all raw materials; S2. Oil phase pot: Add half of the deionized water to the oil phase pot, add the suspension stabilizer in sequence under stirring, stir quickly and disperse evenly, then heat to 58℃, stir quickly until the raw material is completely dissolved, cool to 35℃, then add the complementary color pigment, stir evenly, and set aside. S3. Aqueous phase pot: Add the remaining deionized water to the aqueous phase pot, add the cationic conditioner under stirring until it is completely dissolved and there are no insoluble substances, and then transfer it to the emulsification pot. S4. Emulsifying pot: Add surfactant, heat to 75-80℃ while stirring, and stir until completely dissolved; while stirring, cool down to below 35℃, and pump the oil phase from step S2 into the emulsifying pot, and continue stirring until uniform; S5. Adjust the pH of the mixture obtained in step S4 to 3.0-5.0 using a pH adjuster, then add silicone oil and stir continuously until homogeneous; add the appropriate excipients according to the target dosage form and mix evenly to obtain the final product.

[0055] The present invention will be further illustrated by the following examples, but these are not intended to limit the scope of the invention. Unless otherwise specified, all component contents in the examples are weight percentages.

[0056] The color-correcting shampoo products of Examples 1-5 were prepared according to the raw material composition in Table 1.

[0057] Table 1. Components and content (by weight %) of the color-correcting shampoo products in Examples 1-5 Prepare complementary color hair dyeing shampoo products according to the raw material composition in Table 2, with proportions 1-9.

[0058] Table 2. Components and content (by weight %) of the color-correcting shampoos in Comparative Examples 1-9 Efficacy Evaluation 1. Evaluation of staining performance Dyeing effect and uniformity test: Using commercially available Chinese white hair, hair bundles with an effective length of 25 cm, a width of 3 cm, and an effective weight of 8 g were prepared. The sample was evenly applied to the hair bundles at a ratio of 1.25:1 (sample:hair ratio), gently massaged for 3 minutes, rinsed, and then blow-dried. The color difference (dE) of the dried hair bundles was measured using a colorimeter (Konica Minolta CM-3600 A). * (including L) * a * and b * (Value); 10 different points were selected on each hair strand for measurement, and the chromaticity difference dE at each measurement point was recorded. * i Value, dE * i The calculation formula is: (where L) * 0, a * 0 and b * 0 represents L before staining * a * and b * The value, , and These represent each measurement point after staining. i L * a * and b * The value of , ), calculate the average color difference value of all measurement points. , A larger value indicates better complementary color and dyeing properties. To evaluate the uniformity of complementary color and dyeing, calculations are performed... The standard deviation of the value The smaller the standard deviation, the more consistent the colors are among the measurement points, and the better the uniformity.

[0059] Color Durability Test: After dyeing, the hair strands were shampooed using a regular shampoo without colorant, rinsed thoroughly with water, and then blow-dried. This process was repeated 10 times. The color difference (dE) of the hair strands was then measured again using a colorimeter. * (including L) * a * and b * (Value); 10 different points were selected on each hair strand for measurement, and the chromaticity difference dE at each measurement point was recorded. * i Value, dE * i The calculation formula is: (where L) * 0, a * 0 and b * 0 represents L before staining * a * and b * The value, , and These represent each measurement point after staining. i L * a * and b * The value of , ), calculate the average color difference value of all measurement points. Then calculate the color durability. , The smaller the value, the longer the color lasts.

[0060] 2. Shampoo performance evaluation Foam performance: Refer to GB / T 29679 Part 6-6.2.6 Foam and 6.2.7 Foam testing experiments. For shampoo, the foam testing procedure is as follows: Preheat the super thermostat to (40±1)℃, and maintain the temperature at (40±1)℃ using a Roche foam apparatus. Weigh 2.5 g of the sample, dissolve it in 900 mL of distilled water, then add 100 mL of 1500 mg / kg hard water, and heat to (40±1)℃. Stir to ensure the sample dissolves evenly, and use a 200 mL quantitative funnel to draw a portion of the solution and rinse it along the wall of the foam apparatus. Then, take the test solution and place it at the bottom of the foam apparatus, aligning it with the standard scale to 50 mL. Next, use a 200 mL quantitative funnel to draw up the test solution, fixing the center position of the funnel. After adding all the test solution, immediately record the foam height. Take the average of the two results within the allowable error range as the final result, rounding it to the nearest integer. After standing for 5 minutes, record the foam height again. For shampoo, the foaming procedure is as follows: Determine the foaming power of detergents according to GB / T 13173 (Ross-Miles method). Read the initial foam height; after standing for 5 minutes, record the foam height. Test solution concentration: 2%.

[0061] Sensory evaluation: The various stages of the color-correcting process were evaluated, including wet hair combability, smoothness during rinsing, dry hair combability, dry hair smoothness, and hair shine. A scoring system was used, and the scoring criteria are shown in Table 3.

[0062] Table 3 Scoring criteria for sensory evaluation in shampoo performance testing 3. Evaluation of hair fiber surface morphology High-resolution observation and analysis of hair fiber surface morphology was performed using a scanning electron microscope (SEM). A 1-3 cm long section of dyed hair was cut using clean scissors. Single or multiple hair strands were securely attached to the SEM sample stage using conductive tape, ensuring the hair was straight and the critical parts were facing upwards. Both ends of the hair should be firmly attached to prevent them from flying off due to static electricity in the vacuum chamber. The SEM instrument was powered on and a vacuum was created. The sample was then loaded, and images were acquired. Imaging parameters were adjusted: a suitable accelerating voltage was selected (typically between 5 kV and 15 kV), the working distance was set according to the recommended values ​​in the instruction manual, the beam current was adjusted, a binary electron detector was selected, and then fine focusing and astigmatism correction were performed. Finally, images were captured and saved.

[0063] 4. Product stability testing (1) High temperature stability test: Pour the sample into a transparent bottle to 80% height (three parallel samples) and keep it at (45±2)℃ for 4 weeks. After taking it out and restoring it to room temperature (25±5)℃, observe whether there are any obvious changes compared with the test.

[0064] (2) Freeze-thaw cycle stability test: Pour the sample into a transparent bottle to 80% height (three parallel samples), place it at (-15~-20)℃ for 24 hours, take it out, place it at room temperature (25±5)℃ for 24 hours, take it out to complete one cycle, and observe whether there are any obvious changes after four consecutive cycles.

[0065] (3) Low temperature stability test: Pour the sample into a transparent bottle to 80% height (three parallel samples) and keep it at (-15±2)℃ for 4 weeks. After taking it out and restoring it to room temperature (25±5)℃, observe whether there are any obvious changes compared with the test.

[0066] (4) Thermal cycling stability test: Pour the sample into a transparent bottle to 80% height (three parallel samples) and place it at (-15~-20)℃ for 24 hours. Then, take it out and immediately place it at (45±2)℃. One cycle is 24 hours. Repeat the cycle 4 times. After taking it out and restoring it to room temperature (25±5)℃, observe whether there are any obvious changes compared with before the test.

[0067] The shampoo products of Examples 1-5 and Comparative Examples 1-9 were tested for dyeing effect, dyeing uniformity, and dyeing durability. The test results are shown in Table 4 below: Table 4. Test results of dyeing effect, dyeing uniformity, and dyeing durability of the shampoos in Examples 1-5 and Comparative Examples 1-9. As shown in Table 4, the shampoo products of Examples 1-5 exhibit superior dyeing effect, uniformity, and durability compared to Comparative Examples 1-9. The dyeing effect and uniformity of Example 1 are significantly better than those of Comparative Example 1, indicating that the surfactants sodium lauryl ether sulfate and cocamidopropyl betaine in this invention, when compounded in a certain proportion, enable the product to quickly form a uniform, extremely thin liquid film on the hair surface. This creates a strong ternary composite film between the cationic conditioner, pigment, and hair, fundamentally solving the problem of pigment accumulation and difficulty in color application, achieving a gradual and uniform color-correcting effect. The dyeing effect and uniformity of Examples 2 and 3 are significantly better than those of Comparative Examples 2 and 3, indicating that the cationic conditioner can form ion pairs with acidic dyes, significantly increasing the adsorption capacity and durability of the dye. The dyeing effect and uniformity of Examples 2, 3, and 5 are significantly better than those of Comparative Examples 4, 5, and 6. This indicates that the compounding of hydroxyethyl cellulose and xanthan gum of a specific molecular weight at a ratio of (1-5):1 forms a three-dimensional network structure that can provide yield value, "anchoring" the pigment in the network structure and avoiding local pigment aggregation. At the same time, during the shampooing process, the three-dimensional network structure is destroyed, and the pigment and cationic conditioner are released, forming a pigment-cationic conditioner complex that is uniformly adsorbed on the hair surface. The "gradual" dissociation of the three-dimensional network structure during the dilution process makes the pigment release controllable, avoiding the excessive local deposition caused by the pigment being released all at once during rinsing. The dyeing effect and uniformity of Example 4 are significantly better than those of Comparative Example 7, indicating that a silicone oil emulsion with a particle size of 20-30 micrometers can form a continuous and uniform protective film on the hair surface. This film can lock in the pigment, reducing rinsing loss, and does not hinder subsequent pigment adsorption. However, if the silicone oil particle size is too small, the emulsion breaks down quickly, which will hinder the adsorption and deposition of pigment on the hair surface and will not achieve pigment "locking in." Similarly, if the silicone oil particle size is too large, it will hinder pigment application. The dyeing effect and uniformity of Example 1 are significantly better than those of Comparative Example 8, further demonstrating that a pH of 3.0-5.0 ensures sufficient ionization of the acidic dye. The two-component acid and alkali provide buffering capacity, preventing pH drift during storage or dilution and ensuring consistent dyeing results. The test results in Table 4 further show that the optimal overall performance can only be achieved when the composition and parameters of each component are within the limits defined by this invention.

[0068] The shampoo performance of the shampoo products of Examples 1-5 and Comparative Examples 1-9 was tested, and the test results are shown in Table 5 below: Table 5. Test results of foam performance and sensory evaluation of the shampoos from Examples 1-5 and Comparative Examples 1-9. As shown in Table 5, the shampoo products of Examples 1-5 exhibit superior foaming performance, dry and wet combability, smoothness, and shine compared to Comparative Examples 1-9. The foaming performance of Examples 1-5 is superior to that of Comparative Example 1, indicating that sodium lauryl ether sulfate and cocamidopropyl betaine, when compounded in a specific ratio, can form optimal synergistic stacking, resulting in the highest interfacial film strength and superior foam height and stability. The superior foaming performance of Examples 1-5 compared to Comparative Example 9 indicates that sodium lauryl ether sulfate contains 1EO and 2EO, which can form a wide HLB value distribution. This helps reduce oil-water interfacial tension to promote foaming and also facilitates interfacial film formation, enhancing foam stability. A single EO number and a single HLB value cannot simultaneously meet the dual requirements of excellent foaming and foam stability. The wet hair combability of Examples 1-5 is significantly better than that of Comparative Examples 2, 4 and 6, indicating that the cationic conditioner in this invention can neutralize the negative charge on the surface of damaged hair, reduce friction, and improve combability and smoothness. Xanthan gum with a specific molecular weight gives the product good shear properties, is easy to apply, and forms a uniform lubricating film on the hair surface during rinsing. However, when the molecular weight of xanthan gum is too low, its suspension stability is insufficient, and it cannot effectively carry silicone oil and cationic conditioner to be uniformly deposited on the hair, resulting in a significant decrease in wet hair combability and smoothness. The combability of dry hair in Examples 1-5 is significantly better than that in Comparative Examples 1, 5, and 7, indicating that the silicone oil emulsion used in this invention, with an internal phase viscosity of 500,000-1,500,000 cst and a particle size of 20-30 micrometers, can be uniformly deposited on the hair surface during rinsing, forming a smooth lubricating film and effectively reducing the combing force of dry hair. This invention selects xanthan gum of a specific molecular weight and hydroxyethyl cellulose in a certain mass ratio, forming a three-dimensional network structure that "locks" the cationic conditioning agent within the network structure through steric hindrance. During shampooing, the three-dimensional network structure is disrupted, releasing the pigment and cationic conditioning agent, forming a pigment-cationic conditioning agent complex that is uniformly adsorbed onto the hair surface, effectively coloring the hair while further improving the smoothness of dry hair. Furthermore, this three-dimensional network structure provides yield stress to stabilize the silicone oil, further effectively depositing the silicone oil emulsion on the hair surface, further improving the combability and smoothness of dry hair.The hair gloss of Examples 1-5 is significantly better than that of Comparative Examples 2 and 7, indicating that the silicone oil particle size range of the present invention can effectively fill the gaps and defects of the raised hair cuticles, significantly reducing the roughness of the hair surface and thus improving smoothness. At the same time, it does not form a rough, discontinuous film layer due to excessively large or small silicone oil particle size, resulting in uneven gloss and matte finish. In addition, this silicone oil particle size range can form a uniform, dense and smooth surface protective layer during the drying stage with the anchoring effect of the cationic conditioning agent. This film layer can reduce light diffuse scattering, thereby giving the hair uniform gloss. On the other hand, the suspension stabilizer in the present invention forms a unique three-dimensional network structure under a specific compound ratio, which can work synergistically with the cationic conditioning agent and silicone oil to form a continuous film with uniform thickness and smooth surface during the drying process, directly reducing the roughness of the hair surface and improving the excellent smoothness. At the same time, this continuous film reduces light diffuse reflection, thereby giving the hair excellent gloss. The results in Table 5 further illustrate the synergistic effect among the various technical features defined in the claims of this invention: the surfactant ensures excellent foaming and foam stability; the cationic conditioning agent forms a complex with the acidic dye, promoting pigment deposition and imparting an antistatic effect; xanthan gum of a specific molecular weight and hydroxyethyl cellulose synergistically construct a three-dimensional network structure, ensuring the stability and effective spreadability of the system, while also carrying silicone oil emulsion and cationic conditioning agent to uniformly deposit on the hair surface, giving the hair excellent smoothness and shine. The above components work together to achieve the comprehensive advantages of the composition of this invention in terms of complementary color dyeing effect and hair sensory performance.

[0069] The key morphological features of the surface of hair treated with the shampoo products of Examples 1-5 and Comparative Examples 1-9 were observed using a scanning electron microscope.

[0070] Images of hair treated with the shampoo product of Example 1 under a scanning electron microscope are shown below. Figure 1 As shown. Images of hair treated with the shampoo product of Example 2 under a scanning electron microscope are shown below. Figure 2 As shown. Images of hair treated with the shampoo product of Example 3 under a scanning electron microscope are shown below. Figure 3 As shown. Images of hair treated with the shampoo product of Example 4 under a scanning electron microscope are shown below. Figure 4 As shown. Images of hair treated with the shampoo product of Example 5 under a scanning electron microscope are shown below. Figure 5 As shown. Images of hair treated with the shampoo product of Comparative Example 1 under a scanning electron microscope are shown below. Figure 6 As shown. Images of hair treated with the shampoo product of Comparative Example 2 under a scanning electron microscope are shown below. Figure 7 As shown. Images of hair treated with the shampoo product of Comparative Example 3 under a scanning electron microscope are shown below. Figure 8 As shown. Images of hair treated with the shampoo product of Comparative Example 4 under a scanning electron microscope are shown below. Figure 9 As shown. Images of hair treated with the shampoo product of Comparative Example 5 under a scanning electron microscope are shown below. Figure 10 As shown. Images of hair treated with the shampoo product of Comparative Example 6 under a scanning electron microscope are shown below. Figure 11 As shown. Images of hair treated with the shampoo product of Comparative Example 7 under a scanning electron microscope are shown below. Figure 12 As shown. Images of hair treated with the shampoo product of Comparative Example 8 under a scanning electron microscope are shown below. Figure 13 As shown. Images of hair treated with the shampoo product of Comparative Example 9 under a scanning electron microscope are shown below. Figure 14 As shown.

[0071] The analysis of cuticle integrity, surface smoothness, and product coverage uniformity yielded results shown in Table 6 below: Table 6. Evaluation results of morphological features of Examples 1-5 and Comparative Examples 1-9 As shown in Table 6, compared with the hair treated with the shampoo products of Examples 1-5 and Comparative Examples 1-9, the hair cuticles of Examples 1-5 have clearer edges, tighter closure, higher surface smoothness, and more uniform product coverage. The hair treated with Comparative Examples 1 and 9 has locally raised cuticles, blurred edges, rough surface, and dot-like aggregates, further demonstrating that the surfactant sodium lauryl ether sulfate and cocamidopropyl betaine of the present invention, when compounded in a certain proportion, can form mixed micelles, which have the best ability to reduce surface tension, ensuring that the product spreads evenly on the hair surface, gently cleansing while promoting cuticle closure. Sodium lauryl ether sulfate containing a mixed distribution of 1 EO and 2 EO has different HLB values, and when coexisting, it forms non-ideal mixed micelles with a tighter interface arrangement, higher foam film strength, and also helps stabilize the emulsification of silicone oil and pigments. Hair treated with Comparative Examples 2 and 3 showed noticeably raised cuticles, dotted aggregates, and discontinuous coating, indicating that the composition of the present invention cannot neutralize the charge on the hair surface if it lacks a cationic conditioner. Furthermore, it demonstrates that insufficient nitrogen content (i.e., cationic charge density) in the cationic conditioner of the composition of the present invention leads to insufficient adsorption of charge on the hair surface, preventing cuticle closure and resulting in sparse product coverage. This further illustrates that the nitrogen content of the cationic conditioner in the composition of the present invention directly affects the cationic density: too low a nitrogen content results in insufficient adsorption capacity, affecting the uniform deposition of silicone oil and acidic dyes on the hair surface; conversely, too high a nitrogen content leads to excessive binding with anionic surfactants, causing system instability. The cationic conditioner in the composition of the present invention combines with the hair through electrostatic adsorption, neutralizing the charge and reducing electrostatic repulsion of the cuticles, thus closing them. On the other hand, it forms pseudo-ionic complexes with anionic surfactants, allowing for controlled deposition during rinsing, carrying silicone oil and acidic dyes to adhere to the hair surface. The hair treated with Comparative Examples 4, 5, and 6 exhibited rough surfaces, discontinuous and patchy coatings, further demonstrating the crucial role of the suspension stabilizer in the composition of this invention. The suspension stabilizer in this invention can form a three-dimensional network structure within the system, uniformly dispersing silicone oil and complementary pigments and preventing aggregation and deposition. Furthermore, the suspension stabilizer optimizes the system's viscoelasticity and shear thinning behavior, improving the product's spreadability on the hair surface. Simultaneously, during rinsing, it enables the synchronous deposition of silicone oil, cationic conditioning agents, and complementary pigments, forming a uniform and continuous composite dyeing film, further verifying the combined effect of the components in this invention. The hair treated with Comparative Example 7 showed generally uneven cuticle smoothness, indicating that the silicone oil particle size deviated too much by 20-30 micrometers, resulting in insufficient smoothness or a grainy feel, increased combing force, decreased shine, and poorer hair repair effect. This further demonstrates that the silicone oil emulsion (particle size 20-30 micrometers, internal phase viscosity 50-150 cst) in the composition of this invention can form a low surface energy film on the hair surface, filling the gaps between the cuticles and reducing combing friction.The hair treated with Comparative Example 8 exhibited a rough surface, uneven coverage, and patches, indicating that at higher pH levels, the ionization degree of the acidic dye changes, reducing its binding force with the cationic conditioner and preventing the pigment from adhering evenly to the hair surface. This further demonstrates that the pH range of the composition of this invention enhances the interaction between the complementary pigment and the hair, synergistically forming a uniform composite film on the hair surface with the cationic conditioner and suspension stabilizer, ultimately achieving uniform coverage of the complementary pigment on the hair. In summary, the components of this invention have a synergistic effect: the absence or deviation of any technical feature leads to characteristic deterioration in SEM morphology (such as cuticle lifting, particle aggregation, uneven coverage, etc.). The components work synergistically: the cationic conditioner acts as a "bridge," connecting the hair strands, acidic dye, and silicone oil; the suspension stabilizer provides a three-dimensional network structure to ensure uniform dispersion of all components in the system; the surfactant system provides a spreading medium and can form optimal synergistic stacking, resulting in the highest interfacial film strength and superior foam height and stability. These features work together to achieve the comprehensive advantages of the composition of this invention in terms of hair morphology.

[0072] The stability test results of the shampoos of Examples 1-5 and Comparative Examples 1-9 are shown in Table 7 below: Table 7. Stability test results of shampoo products from Examples 1-5 and Comparative Examples 1-9 As shown in Table 7, the shampoo products of Examples 1-5 exhibit superior stability compared to those of Comparative Examples 1-9. Comparative Examples 1, 2, 4, 5, 6, 8, and 9 showed stratification, precipitation, or pH drift, indicating that the stability issues of the comparative examples are directly related to system imbalance: insufficient suspending stabilizer (lack of xanthan gum, imbalance in the ratio of xanthan gum to hydroxyethyl cellulose, excessively low molecular weight of xanthan gum, etc.) leads to stratification and precipitation; imbalance in the surfactant system (imbalance in the ratio of sodium lauryl ether sulfate to cocamidopropyl betaine, single EO number) leads to emulsification instability and stratification; and high pH leads to pH drift and uneven pigmentation. This further illustrates that the stability of the composition of the present invention is the result of the synergistic effect of its components: the absence or deviation of a single component, even if its components meet the required range, will inevitably lead to the failure of one or more stability tests. That is, the components and their numerical ranges defined in the composition of the present invention are synergistic and irreplaceable.

[0073] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A color-correcting shampoo composition, characterized in that, It consists of the following components by weight percentage: The surfactant is 14-20%, wherein the surfactant is a mixture of sodium lauryl ether sulfate and cocamidopropyl betaine in a mass ratio of (3-10):1, wherein the sodium lauryl ether sulfate comprises a mixture of ethylene oxide addition numbers of 1 and 2; The cationic conditioner is 0.1-0.5%, wherein the cationic conditioner is selected from at least one of polyquaternium-10 and guar hydroxypropyltrimethylammonium chloride, wherein the nitrogen content of polyquaternium-10 is 0.8-2.2%, and the nitrogen content of guar hydroxypropyltrimethylammonium chloride is 1.1-1.9%; The complementary color pigment is 0.05-2%, wherein the complementary color pigment is a water-soluble acid dye and contains at least one sulfonic acid group; The suspension stabilizer is 0.05-2.5%, wherein the suspension stabilizer is a mixture of hydroxyethyl cellulose and xanthan gum in a mass ratio of (1-5):1, wherein the weight average molecular weight Mw of xanthan gum is 3.5 million Da to 5 million Da; 0.2-2.0% silicone oil, wherein the silicone oil is polydimethylsiloxane, the internal phase viscosity is 500,000 to 1,500,000 cst, and it is added in the form of an emulsion, wherein the volume average particle size D50 of the silicone oil dispersed phase in the emulsion is 20-30 μm; A pH adjuster of 0.5-3% is used to adjust the pH of the composition to 3.0-5.0; The remainder is deionized water.

2. The color-correcting shampoo composition according to claim 1, characterized in that, It consists of the following components by weight percentage: surfactant 14-18%; cationic conditioner 0.17-0.3%; complementary pigment 0.14-0.25%; suspension stabilizer 0.4-2.0%; silicone oil 0.3-0.9%; pH adjuster 1.7-2.2%; balance deionized water.

3. The color-correcting shampoo composition according to claim 1, characterized in that, The mass ratio of sodium lauryl ether sulfate to cocamidopropyl betaine is (3-8):

1.

4. The color-correcting shampoo composition according to claim 1, characterized in that, The nitrogen content of the polyquaternium-10 is 0.8-2.0%, and the nitrogen content of the guar gum hydroxypropyltrimethylammonium chloride is 1.3-1.6%.

5. The color-correcting shampoo composition according to claim 1, characterized in that, The mass ratio of hydroxyethyl cellulose to xanthan gum is (1-4):1, and the weight-average molecular weight (Mw) of xanthan gum is 3.5 million Da to 4.8 million Da.

6. The color-correcting shampoo composition according to claim 1, characterized in that, The internal phase viscosity of the silicone oil is 500,000 to 1,200,000 cst, and the volume average particle size D50 of the silicone oil dispersed phase in the emulsion is 22-28 μm.

7. The color-correcting shampoo composition according to claim 1, characterized in that, The pH adjuster is a combination of at least one of citric acid, lactic acid, succinic acid, and salicylic acid with sodium hydroxide.

8. The color-correcting shampoo composition according to claim 1, characterized in that, The water-soluble acid dye has a molecular weight of 300 to 800.

9. The method for preparing the color-correcting shampoo composition according to any one of claims 1-8, characterized in that, Includes the following steps: 1) Disperse the suspension stabilizer in a portion of deionized water, heat to 55-60℃ to dissolve; then cool to below 40℃, add complementary color pigment and mix well to obtain the first mixture; 2) Dissolve the cationic conditioner in the remaining deionized water to obtain a second mixture; 3) Add the surfactant to the second mixture, stir and heat to 75-80℃ until completely dissolved, then stir and cool to below 40℃; then add the first mixture from step 1) and stir to mix evenly; 4) Add pH adjuster to adjust the pH of the material obtained in step 3) to 3.0-5.0, then add silicone oil and stir continuously until evenly mixed to obtain the color-correcting shampoo composition.

10. The use of the color-correcting shampoo composition according to any one of claims 1-8 in the preparation of hair care products, characterized in that, The hair care products are used to maintain dyed hair color, cover new gray hair, or brighten natural hair color.

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