170 results about "Brown pigment" patented technology

The present invention is directed to a transparent medium incorporating the oxidative polymerization product of 3-hydroxykynurenine, a synthetic version of the yellow-to-brown pigment that occurs in the ocular crystalline lens with age. Because this coloration in the ocular lens is believed to offer photoprotection to the retina, it may represent an ideal sun lens filter with an optical transmission spectrum that is compatible with the psychophysical and neurophysiological characteristics of the vision system.

The invention discloses infrared brown camouflage paint and a preparation method and application thereof. The infrared brown camouflage paint consists of the following components in parts by weight: 5-15 parts of brown pigment, 5-20 parts of yellow pigment, 2-5 parts of protective colloid, 5-20 parts of functional filler, 15-30 parts of adhesive and 10-50 parts of water. The preparation method of the infrared brown camouflage paint comprises the following steps: mixing the brown pigment, the yellow pigment, the protective colloid, the functional filler, the adhesive and the water in proportion; and performing ultrasonic dispersion for 0.5-1 hour firstly and then carrying out mechanical stirring for 1-10 hours to obtain the infrared brown camouflage paint. The infrared brown camouflage paint disclosed by the invention has the characteristic of low infrared emissivity, wherein the emissivity reaches 0.69-0.79 at the wavelength of 8-14 microns and basically meets the requirement of infrared camouflage; and meanwhile, the infrared camouflage paint disclosed by the invention is brown which is one of the basic colors of visible light camouflage and realizes a good visible light-near infrared multi-band camouflage compatible effect.

The invention relates to a vegetable dye digital printing ink. The vegetable dye digital printing ink is prepared from, by mass, 10-18 parts of vegetable dye, 8-20 parts of viscosity modifier, 4-15 parts of cosolvent, 0.4-3 parts of surface tension modifier, 1-4 parts of pH modifier, 5-10 parts of wetting agent, 0.5-1.2 parts of bactericide, 2-5 parts of fixer, 1-5 parts of antioxidant, 1-5 parts of mildew preventive and 100-500 parts of deionized water. Red-brown pigment extracted from the green natural plant radix isatidis is taken as the vegetable dye to replace synthetic pigment normally used in existing digital printing ink, and the environment pollution problem and the health problem caused by synthetic pigment are solved; furthermore, by the adoption of the digital printing ink, fabric with ideal color fastness can still be obtained without conducting starching pretreatment on fabric before digital jet printing, and then printing and dyeing processes are simplified and production cost is reduced.

The invention relates to a lossless and comprehensive identification method based on visible spectrum imaging and used for ancient fresco pigment. The method includes: building a comprehensive frescopigment database according to basic pigment used by a fresco and a double-constant Kubelka-Munk theory to serve as the reference foundation of fresco pigment identification; acquiring the visible spectrum image of an ancient fresco; rendering the visible spectrum image to obtain a corresponding colored RGB image; using a superpixel segmentation algorithm to perform fine segmentation on the coloredRGB image; calculating the average spectral reflectance of each subregion; extracting the spectrum features of database samples and subregion pigment; building a fresco pigment identification methodto identify substance variety of the pigment of each subregion, further identifying the average particle size of the pigment if the pigment is single-color pigment, judging that the pigment is the pigment with minimum particle size if the pigment is mixed pigment, and further calculating the concentration proportion of each pigment; acquiring the two-dimensional distribution diagram of each pigment in the fresco so as to complete the lossless and comprehensive identification, which includes pigment substances, particle size, concentration and distribution, of the ancient fresco pigment.

This invention involves separation of brown algae; is a method of extract phycophacin from brown algae. The specific process is: brown algae as raw material, by 60-100% ethanol extraction, concentration, filtration to gain precipitation, macroporous resin column chromatography, spray drying to obtain products. Products content of 1% -20% (HPLC: High Performance Liquid Chromatography, HPLC). This invention is simple, separation result nice, and suitable for industrial production. The invention also involves brown algae in the health-food products, food and cosmetics field applications.

The invention relates to a method used for extracting eleocharis turerosa peel natural brown pigment with ultrasonic wave, which belongs to the technical field of food additive and is characterized by cavitation effect and mechanical effect produced by the ultrasonic wave; edible ethanol solution is adopted as a solvent to extract the eleocharis turerosa peel brown pigment with the ultrasonic wave at the temperature of 50 DEG C to 70 DEG C, the power of 60W to 80W and 60 percent to 80 percent of duty ratio; decompression and distillation are conducted to reclaim the ethanol; the extraction time is one tenth of that of the common extracting method; the yield is 20 percent to 25 percent; the invention is easy for industrialized production, changes the eleocharis turerosa peel which is always taken as waste into valuable; the obtained product is water-soluble natural brown pigment, has antibacterial effect and antioxidation activity, and is suitable to serve as colorant and additive of all kinds of foods.

The invention relates to an extraction method of brown pigment from chestnut shells, which comprises the steps: the first extraction of the chestnut shells is carried out by using dilute alkaline base-alcohol solution, the first still placement and the filtration are carried out, and a first liquid extract is preserved; the second extraction is carried out to filtration residues after the first extraction and the filtration by using the dilute alkaline base-alcohol solution, the cumulative time of the two times of the extraction is 6 hours, the second still placement and the filtration are carried out, a second liquid extract is preserved, and the liquid extracts after the two times of the filtration are merged; and the merged liquid extract is smashed into powder after the concentration and the drying. The extraction process is simple, the cost is low, higher color value can be achieved by only one extraction, and the extracted pigment product has good quality and good stability, thereby being capable of being promoted in the industrial production of food additives and providing a chestnut appreciation way for deep processing enterprises.

The invention discloses a brown pigment for ceramic ink jet printing and a preparation method thereof. The brown ceramic pigment comprises the following materials: 0-10% of CuO, 10-30% of Cr2O3, 20-40% of Al2O3, 0-10 of SiO2, 20-40% of Fe2O3 and 20-40% of ZnO. The method comprises the following steps of: refining the materials and evenly mixing, and sintering at 1100-1300 DEG C to obtain a crude pigment product; super-refining the crude pigment product by using super-fining equipment; and using a grinding machine to treat the super-refined powder to control D90 to be not more than 1 Qing, and separating the super-refined powder to obtain a finished product. Products prepared by the method have the advantages of more uniform chroma and high suspensibility and tinctorial strength, meet the requirements of ink jet printing ink, and have high temperature stability under an antique imitation tile or a transparency glaze and brilliant color tone under the sintered antique imitation tile or transparency glaze, thereby achieving good decoration effect.

The invention discloses a method for extracting pigments in eleocharis tuberose peel and belongs to the field of extraction of natural pigments. The method for extracting the pigments in the eleocharis tuberose peel comprises the following steps of: firstly drying and smashing the eleocharis tuberose peel to obtain eleocharis tuberose peel powder, and dissolving the eleocharis tuberose peel into an ethanol solution; secondly, adding cellulose and pectinase to carry out enzymolysis, and filtering the obtained products after the enzymolysis, so that primarily extracted filter residue is obtained; and thirdly, carrying out vacuum drying on primarily separated filtrate, so that powdery brown pigment is obtained. According to the method for extracting the pigments in the eleocharis tuberose peel, double enzymolysis is carried out on the eleocharis tuberose peel by adopting the cellulase and pectinase, and dissolution rate and leaching rate of the pigments in the eleocharis tuberose peel are increased.

The invention discloses a method for extracting and purifying natural brown pigment from walnut epicarp. The method comprises the following steps: by using the walnut epicarp as a raw material, extracting the walnut epicarp to obtain crude brown pigment extract with water solution of ethanol, separating and purifying the crude brown pigment with petroleum ether, chloroform, acetic ether and n-butyl alcohol as extracting agents, reducing the pressure and drying each extracting agent to obtain three purified brown pigments with different colors. The method is simple and feasible, has low cost, good product quality and good stability, changes waste walnut epicarp after the walnut is processed into valuable, and develops a new resource and a new path for seeking a new natural brown pigment; and the extracted natural brown pigment is widely applied in the fields of food, cosmetics, textiles and pharmacy.

The invention discloses a preparation method of hazelnut shell brown pigment, which comprises the following steps that: two to six times of 0.5 to 3 percent sodium chloride water solution is added to be uniformly mixed after hazelnut shell is smashed, the temperature is adjusted to 30 to 50 DEG C, 1 to 4 percent sodium hydroxide solution with the volume being two to six times of that of the original solution after the temperature is maintained for 40 to 80 minutes, the temperature is adjusted to 50 to 70 DEG C and is continued to be maintained and continuously mixed so as to perform the extraction for 2 to 3 hours, then the extracted liquid is cooled, the pH value is adjusted, the extracted liquid is concentrated after being centrifuged, absolute ethyl alcohol is added into the extracted liquid to be centrifuged, the upper clean liquid is vacuum concentrated, is purified by macroporous resin, is concentrated, frozen and dried to obtain the brown powder-shaped hazelnut shell pigment. The source of the raw material adopted in the method is abundant, and the raw material is sourced from the waste of the agriculture and forestry. Through the technical conversion of the method, the economic added value of the waste such as the hazelnut shell can be effectively improved, thereby having important significance on promoting the development of the hazelnut production and processing industry.

The invention relates to a production and processing technology of natural edible pigment in food additives, and specifically relates to a chestnut shell natural brown pigment grading method. According to the invention, a chestnut shell pigment crude extract is subjected to processes such as acidification precipitation, hydrophilic organic solvent extraction, and macroporous resin adsorption, such that the chestnut shell pigment is graded into three components with different solubility. The component I is soluble in hydrophilic organic solvents, and alkaline, neutral and acidic solutions; the component I is soluble in alkaline solutions and hydrophilic organic solvents; and the component III is only soluble in alkaline solutions. In an application procedure, an appropriate chestnut shell pigment graded component can be selected according to specific conditions. Therefore, the application range of chestnut shell pigments is expanded. The method provided by the invention is safe, non-toxic, and is advantaged in low production cost, simple process, and suitability for industrialized productions.

The invention belongs to the field of natural pigment, and particularly relates to a preparation method and a dyeing method of natural lotus receptacle pigment. The invention adopts the following practical technical scheme: according to the preparation method of the natural lotus receptacle pigment, a lotus receptacle raw material is pulverized via a micro plate pulverizer, the pulverized lotus receptacle raw material is immersed in pure water and then is extracted by using ultrasound to obtain a reddish brown solution, the reddish brown solution is concentrated via vacuum and dried, so that reddish brown pigment powder is obtained. The invention discloses the preparation method of the natural lotus receptacle pigment, which has the advantages that the pigment is high in extraction yield; the natural lotus receptacle pigment prepared by the preparation method is used as a dye for fixing a textile, the fixed texture is natural reddish brown, has mild color and luster, has antiseptic performance, can be applicable to textiles including goggles, underwear, socks, pajamas, domestic textiles and the like, has excellent antiultraviolet performance, and is suitable for summer clothes and summer sun-shield clothes for babies, and the like.

The invention discloses a method for extracting a brown pigment from oil-tea camellia husks. The method comprises the following steps of: cleaning the oil-tea camellia husks, drying the cleaned oil-tea camellia husks in the sun, and grinding the oil-tea camellia husks into powder; mixing the oil-tea camellia husk powder with water or ethanol, and performing ultrasonic extraction to obtain extraction mixed solution; performing suction filtration on the extraction mixed solution to obtain filtrate; performing reduced pressure distillation on the filtrate to evaporate the ethanol out so as to obtain concentrated pigment solution; adjusting the pH value of the concentrated pigment solution, and then adsorbing the concentrated pigment solution by using a chromatography column; eluting the chromatography column by using the ethanol to obtain purified pigment solution; performing reduced pressure distillation on the purified pigment solution to evaporate the ethanol out so as to obtain concentrated purified pigment solution; and performing vacuum drying on the concentrated purified pigment solution to obtain a brown pigment product. The method has a simple process, the needed instrumentsand equipment are common, the extraction rate can reach 3.0 to 5.6 percent, and the color value is high; the raw materials are the oil-tea camellia husks and can be changed from waste into valuable, the ethanol in the production process can be recycled, and the production cost is low; besides, the method uses the water or the ethanol as an extracting agent which causes no adverse effect on the environment.

The invention discloses a method for extracting brown pigment from lotus receptacle. The method comprises the following steps: drying fresh lotus receptacle until the moisture weight percent is less than 15 percent; crushing and screening, and extracting for 1 to 3 hours at the temperature of between 25 and 50 DEG C; filtering, and repeatedly extracting filter residues for 1 to 3 times; combining the filtrates, and passing the filtrate through macroporous absorption resin; cleaning the macroporous absorption resin with absolute ethanol; collecting the cleaned liquid to obtain eluent; and concentrating and drying the eluent in the vacuum of between 0.05 and 0.08MPa and at the temperature of between 40 and 60 DEG C to obtain pigment powder. The product has high stability to light and heat, has good biological activity, good safety, and can be used as additive for foods, medicines, health-care products, cosmetics and the like.

The invention relates to a high-stability chestnut shell brown pigment as well as a refining method and an application thereof. The high-stability chestnut shell brown pigment is a brown liquid made by refining by taking chestnut shell thick extract as a raw material, can be completely dissolved in an aqueous solution with pH of 4-14 and an ethanol solution with the concentration less than or equal to 65% and is in transparent brown; colour index of the brown pigment is 8000-12000, and the index of red is 5.0-7.0; and the brown pigment is added to 15-60% vol of alcoholic drink and cola type carbonated drink and is respectively placed for 30 days under the conditions of irradiation outside, inside and under a fluorescent lamp and temperatures of 4 DEG C and 40 DEG C, and the determined pigment loss ratio is lower than that of a caramel pigment under equal conditions. The chestnut shell brown pigment product prepared by the invention is high in purity, good in dissolubility, high in stability, low in pigment loss ratio and high in safety and can mix colour in the alcoholic drink and coca type carbonated drink by replacing the caramel pigment, and the chestnut shell brown pigment is represented by adopting the index of red and colour index for the first time.

A heat-shrinkable opaque white film of this invention includes a core layer, and white back and front layers, the core layer having a chromatic color impervious to light at wavelengths of 380 to 500 nm or an achromatic color. The core layer may contain a black, yellow, red, or brown pigment. The heat-shrinkable opaque white film in a preferred embodiment has a transmission factor to light at wavelengths of 380 to 500 nm of 5% or less. In another preferred embodiment of the heat-shrinkable opaque white film, the core layer has an achromatic color and the film has a transmission factor to light at wavelengths of 200 to 600 nm of 3% or less. A shrink label of this invention has the heat-shrinkable opaque white film, and a preprinted ink label layer arranged on a surface of the front layer of the film. A labeled container of this invention includes a container body and the shrink label arranged on the container body. This labeled container can prevent discoloration and deterioration of contents induced by light, enables clear printing typically of a design and gives excellent visual impression of the contents.

The invention relates to the field of edible pigment and discloses a method for extracting brown pigment from a plant. The method comprises the following steps: pulverizing the plant containing the brown pigment and extracting brown pigment extracting liquid by using deep-eutectic solvent extracting liquid; adding mixed liquid of petroleum ether and ethyl acetate into the extracting liquid to remove fat, and adding an attapulgite loaded chitosan crosslinked cyclodextrin compound into the defatted extracting liquid to obtain a brown pigment compound precipitate adsorbed on the attapulgite loaded chitosan crosslinked cyclodextrin compound; dissolving the precipitate in an organic solvent to perform desorption and centrifugation to obtain brown pigment supernatant containing the organic solvent; enabling the supernatant to pass through a microporous filtration membrane to obtain a purified brown pigment solution containing the organic solvent; and removing the organic solvent from the brown pigment solution to obtain a target product brown pigment. The deep-eutectic solvent serves as an extracting solvent, so the method is green and environment-friendly, and the extraction rate is high; and the brown pigment is purified and separated by the attapulgite loaded chitosan crosslinked cyclodextrin compound, so the process is simple and the purification and separation efficiency is high.

The invention provides a preparation method of waterborne polyurethane reflective insulation coating. The coating is formed by blending a first component and a second component according to the ratio of {4-10}:1. The first component is prepared from waterborne polyhydroxy hydroxy acrylic resin, high near-infrared reflection white pigment, silicon dioxide aerogel, filler, high near-infrared reflection yellow pigment, high near-infrared reflection brown pigment, high near-infrared reflection red pigment, high near-infrared reflection blue pigment, high near-infrared reflection black pigment, deionized water and auxiliaries. The second component is prepared from waterborne aliphatic polyisocyanate based on HDI, and propylene glycol monomethyl ether. The preparation method includes the steps of conducting drying, preparing the first component, preparing the second component and blending the first component and the second component. The coating has high near-infrared reflectivity, high medium-and-far-infrared reflectivity and low heat conductivity and can be applied to building external walls, absorption of the external walls to sunlight radiation energy can be remarkably reduced, indoor temperature is reduced, the heat insulation temperature difference can reach more than 10 DEG C, and energy consumption of an air conditioner is reduced.

The invention discloses plant skin care toilet soap and a preparation method thereof and belongs to the technical field of washing products. The plant skin care toilet soap is prepared by mixing and pressing a traditional Chinese medicine composition and a soap base in a mass ratio of 1: 1. The plant skin care toilet soap is characterized in that the traditional Chinese medicine composition comprises the following components in parts by weight: 8-15 parts of honeysuckle, 3-8 parts of glossy privet fruits, 3-8 parts of liquorice, 5-10 parts of radix angelicae, 3-8 parts of moutan barks, 2-6 parts of divaricate saposhnikovia roots, 2-6 parts of rhizoma typhonii, 2-5 parts of cinnamomum camphora leaves, 2-5 parts of golden cypress, 1-5 parts of mint, 1-5 parts of selfheal and 2-6 parts of agrimonia pilosa ledeb. The plant skin care toilet soap disclosed by the invention can be used for effectively treating skin diseases such as acne, pimples, whelks, chloasma, freckles, drying and scaling and the like, can be used for effectively eliminating free radicals in the skin, inhibiting peroxides and removing generation of brown pigment in the skin, and has the functions of moistening skin and maintaining beauty, whitening and brightening the skin and removing freckles.

The invention discloses an extracting and purifying method of a red-brown pigment of chestnut shells, and belongs to the technical field of plant extraction separation and purification. The extracting and purifying method comprises the steps: crushing the chestnut shells to form granular raw materials; soaking the granular raw materials in an alcohol water solution with low concentration, extracting by adopting a microwave-assisted extraction method to obtain a primary pigment extract; preparing a primary pigment solution with concentration which is close to or equal to a saturated concentration from the primary pigment extract; mixing the primary pigment solution with the alcohol water solution with the volume which is 2-4 times that of the primary pigment solution, settling, filtering, concentrating to obtain a pigment concentrated solution; mixing the pigment concentrated solution with deionized water with the volume which is 9-11 times that of the primary pigment solution, settling, filtering, and drying to obtain pigment powder. The extracting and purifying method provided by the invention solves the problem of extraction and purification of the red-brown pigment of the chestnut shells; used reagents are nontoxic and pollution-free; the application field of the pigment of the chestnut shells is widened.

The invention discloses a natural complex brown pigment preparation and an application thereof. The brown pigment preparation comprises a chestnut shell liquid pigment with a red index of 5.0-7.0 and a color index of 8000-12000 and a powder monascus red pigment with a color value of 100-120, wherein the weight ratio of the chestnut shell liquid pigment to the powder monascus red pigment is (30-40): 1. The complex brown pigment preparation disclosed by the invention has a wide range of application, almost covers the fields of foods, seasoning products, drinks and the like, has the advantages of caramel-like color after color mixing, light and heat stability, low loss ratio of pigments, greenness and safety, and can completely substitute currently used three types of caramel pigments to be applied in corresponding fields.

The invention discloses a golden pigskin beauty cake which comprises the following raw materials in parts by weight: 90-100 parts of low-gluten flour, 50-60 parts of fresh egg liquid, 8-10 parts of soda powder, 10-20 parts of corn flour, 6-10 parts of pigskin, 1-2 parts of baking powder, 1-2 parts of peach leaves, 2-3 parts of peanuts, 2-3 parts of soybeans, 3-4 parts of red dates, 6-7 parts of apple powder, 3-4 parts of tomatoes, 2-3 parts of honey, 3-5 parts of mulberry juice, 1-2 parts of fructus lyciis, 1-2 parts of angelica, 2-3 parts of pseudostellaria maximowicziana, 1-2 parts of stellaria yunnanensis, and a proper quantity of water. The golden pigskin beauty cake provided by the invention, is attractive in appearance, and excellent in mouth feeling, and has excellent health protection effect; the pigskin contains rich collagen, can promote skin cells to absorb and store moisture, so as to prevent skin from shriveling and wrinkling; the peanuts can effectively preventing the accumulation of brown pigment in the skin, so as to prevent brown brindle and maculation on the face; the red dates can maintain the resilience of skin, and can inhibit and stop the formation of skin melanin; the mulberry can nourish yin and tonify blood, blacken hair and brighten eyes; besides, the cake provided by the invention is particularly suitable for the young, and having the cake for a long time can improve skin and has beauty effect.

The invention discloses a method for extracting and purifying cottonseed brown pigment from cottonseed hulls. The method comprises the following steps: (1) grinding the dried cottonseed hulls to 30-40 meshes; (2) soaking the ground cottonseed hulls in ethyl acetate for 1-3 hours, filtering the solution and removing the filtrate; (3) after removing the filtrate, extracting the cottonseed brown pigment from the cottonseed hulls with alkali-alcohol aqueous solution at the temperature of 35-55 DEG C and centrifuging the water extract to remove the impurities; and (4) adjusting the pH value of thesupernatant obtained through centrifugation to 2-3 with acid and then carrying out concentration and drying, thus obtaining the cottonseed brown pigment. The equipment used in the method is simple and the costs of the solvent and the acid and alkali are lower, thus reducing the extraction cost of the cottonseed brown pigment, and meanwhile, the environmental pollution is reduced, the operation safety is improved and the method is suitable for industrialized production.

The invention relates to an improved cotton fiber color gene technology, and particularly relates to a cotton gene and a plant expression binary vector constructed by the gene and application to improvement of cotton brown fiber color. A nucleotide sequence of the cotton GhMATE1 gene is shown in SEQ ID: NO.1. An amino acid sequence of a protein coded by the gene is shown in SEQ ID: NO.2. On the basis of an early-cloned cotton GhTT12a gene (Chinese patent application number: 201310380270.5, and data of application: 2013-8-27), by using a bioinformatics analysis and electronic cloning method, a new gene containing an MATE (multidrug and toxic compound extrusion) conserved domain database is cloned, but a gene structure and a shearing mode of the cotton GhMATE1 gene are completely different from those of the GhTT12a gene, and the cotton GhMATE1 gene has 78 percent of sequence homology with a nucleotide sequence of an arabidopsis thaliana testa brown pigment synthetic TT12 (Transparent Testa) gene.

The invention discloses a brown non-transparent glaze. The glaze comprises, by weight, 49 parts of frit, 7-9 parts of feldspar, 13-14 parts of quartz, 8-9 parts of kaolin, 3.5-4.5 parts of calcite, 2-3 parts of dolomite, 8-10 parts of calcined talcum, 3-4 parts of calcined tin oxide, 0.5-1 part of a black pigment, and 1-2 parts of a red brown pigment. The glaze has the advantages of strong coloring property, uniform color, fine glaze surface, good hardness, good staining resistance and good acid and alkali resistance. The invention also discloses an environmentally-friendly simple-process method for making a vase by using the glaze.

An infrared ray low heating pigment composition comprises at least two pigment components, the pigment components are selected from the group consisting of a red pigment component, a yellow pigment component, a blue pigment component, an orange pigment component, a purple pigment component, a brown pigment component and a white pigment component, and the infrared ray low heating pigment composition can effectively reduce a heating effect due to infrared ray absorption. The invention also provides an infrared ray low heating material including the infrared ray low heating pigment composition and a substrate, the infrared ray low heating material is low in heating effect after absorption of infrared ray, and degree of absorption of heat of the infrared ray low heating material can be effectively reduced.

The invention discloses a brown pigment-producing Gluconobacter sp. strain, and application of Gluconobacter sp. and Acetobacter pasteurianus (CGMCC 1.41) to mixed fermentation production of liquid-state fermented vinegar with a brown color and excellent flavor. The Gluconobacter sp. strain FBFS 82 is preserved in China Center for Type Culture Collection on July 11th, 2016, with an accession number of CCTCC M2016387. After the Gluconobacter sp. FBFS 82 and Acetobacter pasteurianus CGMCC 1.41 undergo mixed liquid-state fermentation for 6 d under the conditions of a temperature of 30 DEG C and a rotating speed of 170 r / min, the brown liquid-state fermented vinegar with acidity of 4.3%, mild sour flavor and good flavor can be produced. The Gluconobacter sp. and the application thereof in the invention have not been reported in the prior art.

The invention provides an externally applied medicament for treating vitiligo, which relates to medicaments for treating vitiligo. The medicament consists of dark plum fruits, angelica dahurica roots, green husk, green walnut shells, lithospermum, Chinese arborvitae twig, malaytea scurfpea fruits, green eggplant, Chinese ilex leaves, Chinese dodder seeds, clobetasol propionate, laurocapram, chloroform and 90 percent alcohol. A making process comprises: a, soaking the dark plum fruits and the other 10 raw materials in alcohol for 5 to 7 days and forming Chinese medicinal liquid through filtration; b, dissolving clobetasol propionate with chloroform; c, adding clobetasol propionate solution and laurocapram to the Chinese medicinal liquid; and d, adding distilled water for dilution. In general, the raw medicinal materials cooperate to improve immunity by expanding blood vessels, releasing toxin and dispelling wind; brown pigment of the medicament is fully utilized and absorbed; tyrosinase is generated by stimulating skin so as to regenerate pigment; and the pigment is stabilized through allergy resistance. The medicament has the advantages of capability of treating both primary and secondary symptoms, rapid efficacy, safety, reliability, using convenience and good therapeutic effects. 110 clinical trials show that the total effective rate of the medicament reaches 94.5 percent.

The invention discloses a method for extracting a brown pigment of chestnut shells by using ultrasonic waves. The method comprises the following steps of: a) preparing chestnut shell powder; b) mixing the chestnut shell powder and an ethanol-sodium hydroxide solvent, performing first extraction under the function of the ultrasonic waves, standing, filtering, and preserving a first extract liquid; c) mixing filter residue obtained in the step b) and an ethanol-sodium hydroxide solvent, performing second extraction under the function of the ultrasonic waves, standing and filtering for the second time, and combining extract liquids in two times; d) filtering and concentrating the combined extract liquid obtained in the step c), purifying by using a macroporous resin, and collecting the purified eluant; and e) concentrating the eluant in the step d) under reduced pressure, and performing spray drying to obtain brown pigment powder of the chestnut shells. The extraction process is simple, the production efficiency is high, pollution is avoided, the pigment yield and product quality are greatly improved, the method can be promoted to large-scale industrial production, and waste resources, namely the chestnut shells, are utilized maximally.