Mild hair dye capable of coloring quickly and preparation method of mild hair dye

Abstract

The invention relates to the technical field of hair dyes, and particularly discloses a mild hair dye capable of coloring quickly and a preparation method of the mild hair dye. The hair dye comprises an agent A and an agent B. The agent A comprises glycerin, cetostearyl alcohol, myristyl alcohol, flaxseed gum, a stevia rebaudiana extract, tea tree oil, fructo-oligosaccharide, a surfactant, an oxidation dye, a chelating agent, an antioxidant, an emulsifier, grease, a hair conditioner, essence, a pH regulator and water. The agent B comprises cetostearyl alcohol, an emulsifier, grease, glycerol, a chelating agent, a buffering agent, hydrogen peroxide, a stabilizer and water. The hair dye disclosed by the invention can shorten the hair dyeing time, so that the retention time of the hair dye on scalp and hair is shortened, and the irritation and damage of the hair dye to the scalp and the head are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of hair dyes, in particular to a mild hair dye with fast coloring and a preparation method thereof. Background Art

[0002] Double-dose oxidative hair dyes usually consist of two parts: the first part is an alkaline solution containing oxidative dyes, and the second part is a solution containing hydrogen peroxide. After the two are mixed, the alkaline environment will cause the hydrogen peroxide to decompose and release reactive oxygen. These reactive oxygen species can decompose the melanin in the hair and color the dye, thereby achieving the dyeing effect. However, there may be potential health risks in this hair dyeing process. First, hydrogen peroxide and alkaline solutions are irritating to the skin, especially for those who are prone to allergies. After use, they may cause severe allergic reactions such as scalp redness, itching, and even ulceration; secondly, the penetration of hydrogen peroxide and other chemical components will not only destroy the natural protective layer of the hair, but also damage the scalp and hair follicles. Long-term use may cause dry hair, split ends, and even hair loss.

[0003] Therefore, it is necessary to provide a mild two-agent oxidative hair dye to improve the safety of the two-agent oxidative hair dye and reduce the irritation and damage of the two-agent oxidative hair dye to the hair and skin. Summary of the invention

[0004] In order to improve the safety of two-agent oxidative hair dyes and reduce the irritation and damage to hair and skin caused by two-agent oxidative hair dyes, the present application provides a mild hair dye with fast coloring and a preparation method thereof. The hair dye of the present application can not only accelerate the penetration speed of the hair dye into the hair, but also form a protective film on the surface of the hair, thereby reducing damage to the hair. At the same time, the hair dye of the present application has a fast coloring speed, which greatly shortens the residence time of the hair dye on the skin, thereby reducing irritation to the skin.

[0005] In the first aspect, the present application provides a mild hair dye with fast coloring, which adopts the following technical solution: A mild hair dye with fast coloring, comprising an agent A and an agent B, wherein the agent A comprises the following raw materials in percentage by mass: 2% to 4% glycerol, 2% to 5% cetearyl alcohol, 1% to 3% myristyl alcohol, 1% to 3% linseed gum, 0.1% to 0.5% stevia extract, 0.1% to 0.5% tea tree oil, 0.1% to 0.5% oligofructose, 1% to 4% surfactant, 1.52% to 3.4% oxidative dye, 1% to 4% chelating agent, 0.3% to 0.5% antioxidant, 1% to 4% emulsifier, 1% to 4% oil, 0.12% to 2% hair conditioner, 0.2% to 1% flavor, 0.1% to 4% pH regulator, and the balance is water; The B agent includes the following raw materials in percentage by weight: 2% to 6% cetearyl alcohol, 2% to 6% emulsifier, 1% to 4% oil, 2% to 4% glycerin, 1% to 4% chelating agent, 0.01% to 1% buffer, 4% to 10% hydrogen peroxide, 0.01% to 1% stabilizer, 0.5% to 1% gentian extract, and the balance is water.

[0006] In the above technical scheme, the present application realizes the mutual synergy of five specific raw materials in the hair dye by adding myristyl alcohol, linseed gum, stevia extract, tea tree oil and oligofructose. These raw materials can accelerate the entry of oxidative dyes into the cortex layer of hair, promote condensation reaction, significantly shorten the dyeing time of hair dye, and promote the mutual adsorption and fixation of color-developing substances and disulfide bonds, so that the color-developing substances are stably attached to the hair surface layer, improving the durability of the hair dyeing effect. At the same time, these raw materials can form a protective film covering the surface of hair, which plays a role in dust prevention, sun protection and mechanical damage prevention. In addition, since the dyeing time of hair dye is greatly shortened, the irritation and damage of hair dye to scalp and hair follicles are reduced.

[0007] Preferably, the surfactant includes behenyltrimethylammonium chloride and sodium lauryl sarcosinate. In terms of mass percentage of the agent A, the agent A includes 0.5% to 2% behenyltrimethylammonium chloride and 0.5% to 2% sodium lauryl sarcosinate.

[0008] In the above technical scheme, the present application further enhances the penetration of oxidative dyes into hair, shortens dyeing time, effectively reduces the irritation of hair dyes, and maintains the durability of hair dyeing effects through the mutual coordination of five specific raw materials, namely, behenyltrimethylammonium chloride, sodium lauryl sarcosinate and myristyl alcohol, flaxseed gum, stevia extract, tea tree oil, and oligofructose, through a specific combination of surfactants.

[0009] Preferably, the oxidative dye comprises p-phenylenediamine, m-aminophenol, resorcinol, p-aminophenol and 2,4-diaminophenoxyethanol hydrochloride. Calculated by mass percentage of agent A, agent A comprises 1% to 2% p-phenylenediamine, 0.5% to 1% m-aminophenol, 0.01% to 0.2% resorcinol, 0.01% to 2% p-aminophenol and 0.5% to 1% 2,4-diaminophenoxyethanol hydrochloride.

[0010] In the above technical scheme, the present application uses a specific oxidation dye combination, and through the cooperation of five specific raw materials, namely, myristyl alcohol, linseed gum, stevia extract, tea tree oil, and oligofructose, and such an oxidation dye combination, it can further accelerate the oxidation dye to enter the cortex layer of the hair, further promote the condensation reaction, and further shorten the dyeing time of the hair dye.

[0011] Preferably, the oil comprises one or more of white oil, isopropyl palmitate and isooctyl palmitate.

[0012] In the above technical solution, the present application can promote the formation of a more uniform and stable protective film on the surface of the hair and enhance the protective effect on the hair by adding oils such as white oil, isopropyl palmitate and isooctyl palmitate to the hair dye. In addition, these oil components help to improve the texture of the hair dye, making it milder and easier to apply, thereby reducing irritation to the scalp.

[0013] Preferably, the emulsifier is one or more of oleth-5, glyceryl stearate and octylphenol polyoxyethylene ether.

[0014] Preferably, the emulsifier of Agent A includes oleth-5 and glyceryl stearate. Calculated by mass percentage of Agent A, Agent A includes 0.5% to 2% oleth-5 and 0.5% to 2% glyceryl stearate.

[0015] Preferably, the emulsifier of the agent B includes oleth-5, glyceryl stearate and octylphenol polyoxyethylene ether. Calculated by mass percentage of the agent B, the agent B includes 0.5% to 2% oleth-5, 0.5% to 2% glyceryl stearate and 1% to 2% octylphenol polyoxyethylene ether.

[0016] In the above technical scheme, the present application can improve the stability and dispersibility of the hair dye by adding emulsifiers such as oleth-5, glyceryl stearate and octylphenol polyoxyethylene ether into the hair dye, ensure that the dye and oil and other ingredients are evenly mixed, thereby improving the hair dyeing effect.

[0017] In a second aspect, the present application provides a method for preparing a mild hair dye with fast coloring, which adopts the following technical scheme: a method for preparing a mild hair dye with fast coloring, wherein the preparation of agent A comprises the following steps: Step a1: mix cetearyl alcohol, myristyl alcohol, linseed gum, an emulsifier and oil and stir evenly at 80-85° C. to obtain material 1; Step a2: Mix water, surfactant, glycerin and chelating agent and stir evenly at 80-85° C. to obtain material 2; Step a3: Mix stevia extract, tea tree oil, oligofructose, oxidative dye, antioxidant, and hair conditioner and stir evenly at 40-45° C. to obtain material 3; Step a4: Mix material 1 and material 2 at 80-85°C, emulsify and homogenize, and keep the mixture warm for 1-2 hours; Step a5: Cool the material obtained in step a4 to below 40°C, add material 3 and mix evenly, then add the remaining raw materials and stir evenly to obtain agent A; The preparation of the B agent comprises the following steps: Step b1: Mix cetearyl alcohol and an emulsifier and stir evenly at 80-85° C. to obtain a mixture 1; Step b2: mixing oil, glycerin, chelating agent, buffer and water and stirring at 80-85° C. to obtain mixture 2; Step b3: Mixing, emulsifying and homogenizing mixed materials 1 and 2 at 80-85° C., and keeping the temperature for reaction for 1-2 hours; Step b4: Cool the mixture obtained in step b3 to below 40°C, add the remaining raw materials, and stir evenly to obtain Agent B.

[0018] In the above technical scheme, the present application ensures the activity and stability of each raw material in the hair dye through specific preparation steps and temperature control, and ensures the quality of the hair dye, so that the hair dye can act on the hair quickly and evenly when used, achieving an ideal hair dyeing effect.

[0019] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application not only significantly shortens the dyeing time of the hair dye but also improves the durability of the hair dyeing effect by adding myristyl alcohol, linseed gum, stevia extract, tea tree oil and oligofructose to the hair dye. At the same time, these raw materials can form a protective film on the surface of the hair to prevent dust, sunscreen and mechanical damage.

[0020] 2. The present application shortens the dyeing time of the hair dye, thereby shortening the residence time of the hair dye on the scalp and hair, and reducing the irritation and damage of the hair dye to the scalp and hair follicles.

[0021] 3. The present application further enhances the penetration of oxidative dyes into hair, further shortens dyeing time, and further reduces the irritation of hair dyes through the mutual coordination of behenyltrimethylammonium chloride, sodium lauryl sarcosinate and myristyl alcohol, flaxseed gum, stevia extract, tea tree oil, and oligofructose. The present application further enhances the penetration of oxidative dyes into hair, further shortens dyeing time, and further reduces the irritation of hair dyes by adding gentian extract, which has certain anti-inflammatory and antibacterial effects, can inhibit scalp inflammation and bacterial growth, and further improves the usage experience and safety of hair dyes. DETAILED DESCRIPTION

[0022] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0023] Example 1 A hair dye comprises an A agent and a B agent.

[0024] Among them, Agent A includes glycerin, cetearyl alcohol, myristyl alcohol, flaxseed gum, stevia extract, tea tree oil, oligofructose, surfactant, oxidative dye, chelating agent, antioxidant, emulsifier, oil, hair conditioner, fragrance, pH adjuster and water.

[0025] The surfactant is a mixture of behenyltrimethylammonium chloride and sodium lauryl sarcosinate.

[0026] The oxidation dye is a mixture of p-phenylenediamine, m-aminophenol, resorcinol, p-aminophenol and 2,4-diaminophenoxyethanol hydrochloride.

[0027] Wherein, the chelating agent is disodium ethylenediaminetetraacetate.

[0028] Among them, the antioxidant is sodium erythorbate.

[0029] Among them, the emulsifier is a mixture of oleth-5 and glyceryl stearate.

[0030] Among them, the oil is isopropyl palmitate.

[0031] Among them, the hair conditioning agent is a mixture of polydimethylsiloxane, polygonum multiflorum extract and ginseng root extract.

[0032] Wherein, the pH adjuster is monoethanolamine.

[0033] Among them, myristyl alcohol is myristyl alcohol D1UL produced by Kunshan Shengan Biotechnology Co., Ltd.

[0034] Among them, the flaxseed gum is 99% effective content flaxseed gum from Guangdong Mingtong Biotechnology Co., Ltd.

[0035] Among them, the stevia extract is the 99% effective content stevia extract of Anhui Hongli Biotechnology Co., Ltd.

[0036] Among them, tea tree oil is tea tree essential oil from Hubei Xinyuhong Biotechnology Co., Ltd.

[0037] Among them, oligofructose is 99% effective content oligofructose from Guangdong Mingtong Biotechnology Co., Ltd.

[0038] Among them, behenyltrimethylammonium chloride is behenyltrimethylammonium chloride JST of Shandong Jinshengtai Chemical Co., Ltd.

[0039] Among them, sodium lauryl sarcosine is the amino acid anionic surfactant LCS-30 produced by Guangzhou Huazhiwang Chemical Co., Ltd.

[0040] Among them, oleth-5 is the emulsifier OV-5 from Hai'an Petrochemical Plant in Jiangsu Province.

[0041] Among them, glyceryl stearate is emulsifier SG-9 from Hai'an Petrochemical Plant in Jiangsu Province.

[0042] Among them, agent B includes cetearyl alcohol, emulsifier, oil, glycerin, chelating agent, buffer, hydrogen peroxide, stabilizer, gentian extract and water.

[0043] Among them, the emulsifier is a mixture of oleth-5, glyceryl stearate and octylphenol polyoxyethylene ether.

[0044] Among them, grease is white oil.

[0045] Wherein, the chelating agent is disodium ethylenediaminetetraacetate.

[0046] The buffer is disodium hydrogen phosphate.

[0047] Among them, the stabilizer is tetrasodium pyrophosphate.

[0048] Among them, octylphenol polyoxyethylene ether is the emulsifier OP-10 from Hai'an Petrochemical Plant in Jiangsu Province.

[0049] Among them, the gentian extract is the gentian extract of Shenzhen Jinfuyuan Biotechnology Co., Ltd., with an active ingredient content of 10%.

[0050] The method for preparing the mild hair dye with fast coloring includes the preparation of agent A and agent B.

[0051] The preparation of agent A comprises the following steps: Step a1: Mix cetearyl alcohol, myristyl alcohol, linseed gum, an emulsifier and oil and stir evenly at 80° C. to obtain material 1.

[0052] Step a2: Mix water, surfactant, glycerin and chelating agent and stir evenly at 80° C. to obtain material 2.

[0053] Step a3: Mix stevia extract, tea tree oil, oligofructose, oxidative dye, antioxidant and hair conditioner and stir evenly at 40° C. to obtain material 3.

[0054] Step a4: Mix material 1 and material 2 at 80°C, emulsify and homogenize, and keep the mixture warm for 1-2 hours.

[0055] Step a5: Cool the material obtained in step a4 to below 40°C, add material 3 and mix evenly, then add the remaining raw materials and stir evenly to obtain agent A.

[0056] Wherein, the preparation of agent B comprises the following steps: Step b1: Mix cetearyl alcohol and an emulsifier and stir evenly at 80° C. to obtain a mixture 1.

[0057] Step b2: Mix the oil, glycerin, chelating agent, buffer and water and stir evenly at 80° C. to obtain a mixture 2.

[0058] Step b3: Mix, emulsify and homogenize mixed material 1 and mixed material 2 at 80° C. and keep the mixture warm for 1-2 hours.

[0059] Step b4: Cool the mixture obtained in step b3 to below 40°C, add the remaining raw materials, and stir evenly to obtain Agent B.

[0060] Example 2 A hair dye, which is different from Example 1 in that the amounts of raw materials used in Agent A and Agent B are inconsistent.

[0061] The method for preparing the mild hair dye with fast coloring includes the preparation of agent A and agent B.

[0062] The preparation of agent A comprises the following steps: Step a1: Mix cetearyl alcohol, myristyl alcohol, linseed gum, an emulsifier and oil and stir evenly at 85° C. to obtain material 1.

[0063] Step a2: Mix water, surfactant, glycerin and chelating agent and stir evenly at 85° C. to obtain material 2.

[0064] Step a3: Mix stevia extract, tea tree oil, oligofructose, oxidative dye, antioxidant and hair conditioner and stir evenly at 45° C. to obtain material 3.

[0065] Step a4: Mix, emulsify and homogenize material 1 and material 2 at 85°C, and keep the mixture warm for 1-2 hours.

[0066] Step a5: Cool the material obtained in step a4 to below 40°C, add material 3 and mix evenly, then add the remaining raw materials and stir evenly to obtain agent A.

[0067] Wherein, the preparation of agent B comprises the following steps: Step b1: Mix cetearyl alcohol and an emulsifier and stir evenly at 85° C. to obtain a mixture 1.

[0068] Step b2: Mix the oil, glycerin, chelating agent, buffer and water and stir evenly at 85° C. to obtain mixture 2.

[0069] Step b3: Mix, emulsify and homogenize mixed material 1 and mixed material 2 at 85° C. and keep the mixture warm for 1-2 hours.

[0070] Step b4: Cool the mixture obtained in step b3 to below 40°C, add the remaining raw materials, and stir evenly to obtain Agent B.

[0071] Example 3 A hair dye, which is different from Example 1 in that the amounts of raw materials used in Agent A and Agent B are inconsistent.

[0072] The method for preparing the mild hair dye with fast coloring includes the preparation of agent A and agent B.

[0073] The preparation of agent A comprises the following steps: Step a1: Mix cetearyl alcohol, myristyl alcohol, linseed gum, an emulsifier and oil and stir evenly at 82° C. to obtain material 1.

[0074] Step a2: Mix water, surfactant, glycerin and chelating agent and stir evenly at 82° C. to obtain material 2.

[0075] Step a3: Mix stevia extract, tea tree oil, oligofructose, oxidative dye, antioxidant and hair conditioner and stir evenly at 44° C. to obtain material 3.

[0076] Step a4: Mix, emulsify and homogenize material 1 and material 2 at 82°C, and keep the mixture warm for 1-2 hours.

[0077] Step a5: Cool the material obtained in step a4 to below 40°C, add material 3 and mix evenly, then add the remaining raw materials and stir evenly to obtain agent A.

[0078] Wherein, the preparation of agent B comprises the following steps: Step b1: Mix cetearyl alcohol and an emulsifier and stir evenly at 82° C. to obtain a mixture 1.

[0079] Step b2: Mix the oil, glycerin, chelating agent, buffer and water and stir evenly at 82° C. to obtain mixture 2.

[0080] Step b3: Mix, emulsify and homogenize mixture 1 and mixture 2 at 82° C. and keep the mixture warm for 1-2 hours.

[0081] Step b4: Cool the mixture obtained in step b3 to below 40°C, add the remaining raw materials, and stir evenly to obtain Agent B.

[0082] The amounts of the raw materials used in Agent A of Examples 1 to 3 are shown in Table 1.

[0083] Table 1: The amounts of the raw materials used in Agent B of Examples 1 to 3 are shown in Table 2.

[0084] Table 2: Example 4 A hair dye, which is different from Example 1 in that an equal amount of behenyltrimethylammonium chloride in Agent A is replaced by hexadecyltrimethylammonium chloride.

[0085] Example 5 A hair dye, which is different from Example 1 in that an equal amount of sodium lauryl sarcosinate in Agent A is replaced by sodium lauryl sulfate.

[0086] Comparative Example 1 A hair dye, which is different from Example 1 in that an equal amount of myristyl alcohol is replaced by stearyl alcohol.

[0087] Comparative Example 2 A hair dye, which is different from Example 1 in that flaxseed gum is replaced by locust bean gum in equal amounts.

[0088] Comparative Example 3 A hair dye, which is different from Example 1 in that an equal amount of stevia extract is replaced by galactoside.

[0089] Comparative Example 4 A hair dye, which is different from Example 1 in that tea tree oil is replaced by lavender oil in equal amounts.

[0090] Comparative Example 5 A hair dye, which is different from Example 1 in that oligofructose is replaced by polypropylene glycol in an equal amount.

[0091] Hair dyeing effect test sample: When using the hair dyes of the above embodiments and comparative examples, mix agent A and agent B in a mass ratio of 1:1 and then use them.

[0092] Test 1, dyeing time: take the same batch of white hair and divide it into 10 groups. Apply the test sample evenly on each group within the same time. Start timing when the application is completed and end when the hair color remains basically unchanged. Record the dyeing time. Perform 10 parallel tests on each group and take the average value.

[0093] Test 2, color fastness: Set the dyeing temperature to 50℃ and the dyeing time to 60min. After dyeing, rub the dyed hair with shampoo and rinse it, then rub it with conditioner and rinse it. The rubbing and rinsing time are both 1min. After wiping with water with a towel, blow dry it with a hair dryer. This process is 1 wash. After washing the hair 20 times, score it with a special scoring card. The scoring standard is 1 to 5 points. The higher the score, the better the color fastness, and vice versa. The color fastness score of each group of samples is scored by 10 testers and the average value is taken.

[0094] Test 3, tensile properties: Use an electronic single yarn strength meter to measure the breaking strength of the hair before and after dyeing. Each group of samples is tested 10 times, and the average value is taken. The breaking strength retention rate (%) is calculated. The breaking strength retention rate (%) = breaking strength after dyeing / breaking strength before dyeing*100%.

[0095] The above test results are shown in Table 3.

[0096] It can be seen from the test results in Table 3 that the hair dyes of Examples 1 to 5 all performed well in terms of dyeing time, color fastness score average, and breaking strength retention rate.

[0097] Specifically combining the analysis of Example 1 and Comparative Examples 1 to 5, it can be seen that Comparative Examples 1 to 5 replace myristyl alcohol, linseed gum, stevia extract, tea tree oil and oligofructose with stearyl alcohol, locust bean gum, galactoside, lavender oil and polypropylene glycol, respectively, and the dyeing time, color fastness score average and breaking strength retention rate of Example 1 are obviously good, which shows that adding myristyl alcohol, linseed gum, stevia extract, tea tree oil and oligofructose to the hair dye can not only significantly shorten the dyeing time of the hair dye, but also improve the durability of the hair dyeing effect and reduce hair damage.

[0098] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A mild hair dye with fast coloring, characterized in that: It includes agent A and agent B, wherein agent A includes the following raw materials in percentage by weight: 2%~4% glycerin, 2%~5% cetearyl alcohol, 1%~3% myristyl alcohol, 1%~3% linseed gum, 0.1%~0.5% stevia extract, 0.1%~0.5% tea tree oil, 0.1%~0.5% oligofructose, 1%~4% surfactant, 1.52%~3.4% oxidative dye, 1%~4% chelating agent, 0.3%~0.5% antioxidant, 1%~4% emulsifier, 1%~4% oil, 0.12%~2% hair conditioner, 0.2%~1% fragrance, 0.1%~4% pH regulator, and the balance is water; The B agent includes the following raw materials in percentage by weight: 2%~6% cetearyl alcohol, 2%~6% emulsifier, 1%~4% oil, 2%~4% glycerin, 1%~4% chelating agent, 0.01%~1% buffer, 4%~10% hydrogen peroxide, 0.01%~1% stabilizer, 0.5%~1% gentian extract, and the balance is water.

2. A mild hair dye with fast coloring according to claim 1, characterized in that: The surfactant includes behenyl trimethyl ammonium chloride and sodium lauryl sarcosinate. In terms of mass percentage of the agent A, the agent A includes 0.5% to 2% behenyl trimethyl ammonium chloride and 0.5% to 2% sodium lauryl sarcosinate.

3. A mild hair dye with fast coloring according to claim 1, characterized in that: The oxidative dye comprises p-phenylenediamine, m-aminophenol, resorcinol, p-aminophenol and 2,4-diaminophenoxyethanol hydrochloride. Calculated by mass percentage of the agent A, the agent A comprises 1% to 2% p-phenylenediamine, 0.5% to 1% m-aminophenol, 0.01% to 0.2% resorcinol, 0.01% to 2% p-aminophenol and 0.5% to 1% 2,4-diaminophenoxyethanol hydrochloride.

4. A mild hair dye with fast coloring according to claim 1, characterized in that: The oil comprises one or more of white oil, isopropyl palmitate and isooctyl palmitate.

5. A mild hair dye with fast coloring according to claim 1, characterized in that: The emulsifier is one or more of oleth-5, glyceryl stearate and octylphenol polyoxyethylene ether.

6. A mild hair dye with fast coloring according to claim 5, characterized in that: The emulsifier of the agent A includes oleth-5 and glyceryl stearate. In terms of the mass percentage of the agent A, the agent A includes 0.5% to 2% oleth-5 and 0.5% to 2% glyceryl stearate.

7. A mild hair dye with fast coloring according to claim 5, characterized in that: The emulsifier of the B agent includes oleth-5, glyceryl stearate and octylphenol polyoxyethylene ether. Calculated by mass percentage of the B agent, the B agent includes 0.5% to 2% oleth-5, 0.5% to 2% glyceryl stearate and 1% to 2% octylphenol polyoxyethylene ether.

8. A method for preparing a mild hair dye with fast coloring as claimed in any one of claims 1 to 7, characterized in that: The preparation of the A agent comprises the following steps: Step a1: mix cetearyl alcohol, myristyl alcohol, linseed gum, an emulsifier and oil and stir evenly at 80-85° C. to obtain material 1; Step a2: Mix water, surfactant, glycerin and chelating agent and stir evenly at 80-85° C. to obtain material 2; Step a3: Mix stevia extract, tea tree oil, oligofructose, oxidative dye, antioxidant, and hair conditioner and stir evenly at 40-45° C. to obtain material 3; Step a4: Mix, emulsify and homogenize material 1 and material 2 at 80-85°C, and keep the mixture warm for 1-2 hours; Step a5: Cool the material obtained in step a4 to below 40°C, add material 3 and mix evenly, then add the remaining raw materials and stir evenly to obtain agent A; The preparation of the B agent comprises the following steps: Step b1: mix cetearyl alcohol and an emulsifier and stir evenly at 80-85° C. to obtain a mixture 1; Step b2: mixing oil, glycerin, chelating agent, buffer and water and stirring at 80-85° C. to obtain mixture 2; Step b3: Mixing, emulsifying and homogenizing mixed materials 1 and 2 at 80-85°C, and keeping the temperature for reaction for 1-2 hours; Step b4: Cool the mixture obtained in step b3 to below 40°C, add the remaining raw materials, and stir evenly to obtain Agent B.

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