Washable vegetable dye composition and preparation method thereof

Abstract

The invention discloses a washable plant dye composition, the composition is composed of an oolong tea extract, a yellow tea extract and a white tea extract, and the invention also provides a preparation method of the washable plant dye composition.The washable plant dye composition provided by the invention has the characteristics of difficult fading and washable property, and can be applied to the field of dye preparation. The dye composition disclosed by the invention solves the problems that a vegetable dye in the prior art is not washable and easy to fade, meanwhile, the dye composition disclosed by the invention is simple in preparation method and good in safety, does not cause environmental pollution caused by chemically synthesized dyes in the preparation process, can be applied to clean production of the printing and dyeing industry, and has a wide application prospect.

Description

Technical Field

[0001] The invention discloses a plant dye composition, in particular to a water-resistant plant dye composition and a preparation method thereof, belonging to the technical field of dyes. Background Art

[0002] At present, synthetic dyes are commonly used for fabric dyeing. Because their main sources are petroleum and coal, some synthetic dyes are irritating to human skin and even contain toxic substances. At the same time, synthetic dyes will discharge a large amount of sewage during the production process, causing environmental damage. In addition to controlling the acid, alkali and dye content in the discharge, producers must also control the increasing content of heavy metals (such as mercury, cadmium, copper, nickel, lead, zinc and chromium). In the long run, resources are becoming increasingly scarce and cannot be regenerated, which does not meet the requirements of sustainable development.

[0003] Natural dyes refer to dyes obtained from plants, animals or mineral resources, without artificial synthesis, and with little or no chemical processing. Plant dyes are the most important category of natural dyes, and are unique for their excellent characteristics such as wide sources, non-toxicity, low pollution, insect resistance, sterilization and preservation. Generally, leaves, skins, flowers and roots of plants contain a certain amount of pigments. Plant dyes come from plants, without chemical pollution in the production process of synthetic dyes, which is very beneficial to protecting the ecological environment. They also have the advantages of antibacterial biological activity and health care functions; most natural dyes have good compatibility with the environment and ecology, are non-irritating to the human body, have unique tones, and are naturally elegant; in addition, the residues left in the preparation process of plant dyes are themselves components of plants, and can be used as fertilizers after processing without causing pollution, but plant dyes have the problem of not being resistant to washing and fading easily.

[0004] In summary, it is very necessary to develop a plant dye composition that is not easy to fade and is washable. Summary of the invention

[0005] In view of the above-mentioned shortcomings, the object of the present invention is to provide a plant dye composition which is not easy to fade and is resistant to water washing, and also provides a weaving method of the washable plant dye composition.

[0006] To this end, the first technical solution provided by the present invention is as follows:

[0007] A water-resistant plant dye composition consists of an oolong tea extract, a yellow tea extract and a white tea extract.

[0008] Furthermore, the composition ratio of oolong tea extract, yellow tea extract and white tea extract in the composition is 1:1:1.

[0009] Furthermore, the oolong tea extract consists of narcissus tea extract, Qilan tea extract and phoenix dancong tea extract.

[0010] Furthermore, the composition ratio of the narcissus tea extract, the Qilan tea extract and the phoenix dancong tea extract in the oolong tea extract is 4:3:3.

[0011] Furthermore, the yellow tea extract consists of Junshan Yinzhen tea extract, Beigang Maojian tea extract and Pingyang Huangtang tea extract.

[0012] Furthermore, the composition ratio of the Junshan Yinzhen tea extract, the Beigang Maojian tea extract and the Pingyang Huangtang tea extract in the yellow tea extract is 2:3:5.

[0013] Furthermore, the white tea extract consists of white peony tea extract, Shoumei tea extract and Gongmei tea extract.

[0014] Furthermore, the composition ratio of the white peony tea extract, the Shoumei tea extract and the Gongmei tea extract in the white tea extract is 1:6:3.

[0015] The second technical solution provided by the invention is: a method for preparing the above-mentioned water-resistant plant dye composition, which is prepared by the following steps:

[0016] S1, preparing oolong tea extract, weighing narcissus tea, Qilan tea and phoenix single fir tea in proportion, mixing them with 75% ethanol aqueous solution, placing them in a high-voltage pulse electric field with an intensity of 10 kV / cm for low-temperature alcohol extraction at 0-5°C, filtering to obtain a first filtrate and a first filter residue, mixing the first filter residue with 75% ethanol aqueous solution, placing them in a high-voltage pulse electric field with an intensity of 15 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a second filtrate and a second filter residue, mixing the second filter residue with 75% ethanol aqueous solution, placing them in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, mixing the third filter residue with 75% ethanol aqueous solution, placing them in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, combining the first filtrate, the second filtrate, the third filtrate and the fourth filtrate to obtain an oolong tea extract;

[0017] S2, prepare yellow tea extract, weigh Junshan Yinzhen tea, Beigang Maojian tea and Pingyang Huangtang tea in proportion, mix them with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm for low-temperature alcohol extraction at 0-5°C, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a second filtrate and a second filter residue, mix the second filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, mix the third filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, combine the first filtrate, the second filtrate, the third filtrate and the fourth filtrate to obtain a yellow tea extract;

[0018] S3, prepare white tea extract, weigh white peony tea, Shoumei tea and Gongmei tea in proportion, mix them with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm for low-temperature alcohol extraction at 0-5°C, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a second filtrate and a second filter residue, mix the second filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, mix the third filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, combine the first filtrate, the second filtrate, the third filtrate and the fourth filtrate to obtain a white tea extract;

[0019] S4, mixing the oolong tea extract obtained in S1, the yellow tea extract obtained in S2 and the white tea extract obtained in S3 in proportion to obtain a water-resistant plant dye composition.

[0020] Furthermore, the solid-liquid ratio of the raw material to the extraction solvent in S1 to S3 is 1:(30-50).

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. By screening the plant raw materials and placing the raw materials in a high-voltage pulse electric field for low-temperature alcohol extraction, the prepared dye composition can be made to have the characteristics of being not easy to fade and resistant to water washing, thus solving the problem of plant dyes in the prior art being not resistant to water washing and easy to fade;

[0023] 2. The preparation method of the dye composition disclosed in the present invention is simple and safe. There is no pollution to the environment caused by chemical synthetic dyes during the preparation process. The dye composition can be applied to clean production in the printing and dyeing industry and has broad application prospects. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0025] Example 1

[0026] A washable plant dye composition comprises narcissus tea extract, Qilan tea extract, Fenghuang Dancong tea extract, Junshan Yinzhen tea extract, Beigang Maojian tea extract, Pingyang Huangtang tea extract, white peony tea extract, Shoumei tea extract and Gongmei tea extract in a ratio of 4:3:3:2:3:1:6:3.

[0027] The composition is prepared by the following preparation method:

[0028] S1. Prepare oolong tea extract, weigh narcissus tea, Qilan tea and phoenix single fir tea in a ratio of 4:3:3, mix them with 75% ethanol aqueous solution at a solid-liquid ratio of 1:30, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm at 0-5°C for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution at a solid-liquid ratio of 1:30, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm at 0-5°C for low-temperature alcohol extraction, obtain a second filtrate and a second The first filtrate, the second filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:30, and the mixture is placed in a high-voltage pulse electric field with an intensity of 20 kV / cm at a temperature of 0 to 5°C for low-temperature alcohol extraction to obtain a third filtrate and a third filtrate, the third filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:30, and the mixture is placed in a high-voltage pulse electric field with an intensity of 25 kV / cm at a temperature of 0 to 5°C for low-temperature alcohol extraction to obtain a fourth filtrate and a fourth filtrate, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain an oolong tea extract;

[0029] S2. Prepare yellow tea extract, weigh Junshan Yinzhen tea, Beigang Maojian tea and Pingyang Huangtang tea in a ratio of 2:3:5, mix with 75% ethanol aqueous solution, solid-liquid ratio of 1:30, place in a high-voltage pulse electric field with an intensity of 10 kV / cm at 0-5 ° C for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, the first filter residue is mixed with 75% ethanol aqueous solution, solid-liquid ratio of 1:30, place in a high-voltage pulse electric field with an intensity of 15 kV / cm at 0-5 ° C for low-temperature alcohol extraction to obtain a second filtrate and the second filter residue, the second filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:30, and placed in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, the third filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:30, and placed in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a yellow tea extract;

[0030] S3, prepare white tea extract, weigh white peony tea, Shoumei tea and Gongmei tea in a ratio of 1:6:3, mix with 75% ethanol aqueous solution, solid-liquid ratio of 1:30, place in a high-voltage pulse electric field with an intensity of 10kV / cm at 0-5℃ for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution, solid-liquid ratio of 1:30, place in a high-voltage pulse electric field with an intensity of 15kV / cm at 0-5℃ for low-temperature alcohol extraction, obtain a second filtrate and a second The first filtrate, the second filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:30, and the mixture is placed in a high-voltage pulse electric field with an intensity of 20 kV / cm at a low temperature of 0-5°C for alcohol extraction to obtain a third filtrate and a third filtrate, the third filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:30, and the mixture is placed in a high-voltage pulse electric field with an intensity of 25 kV / cm at a low temperature of 0-5°C for alcohol extraction to obtain a fourth filtrate and a fourth filtrate, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a white tea extract;

[0031] S4, mixing the oolong tea extract obtained in S1, the yellow tea extract obtained in S2 and the white tea extract obtained in S3 in a ratio of 1:1:1 to obtain a washable plant dye composition.

[0032] Example 2

[0033] A washable plant dye composition comprises narcissus tea extract, Qilan tea extract, Fenghuang Dancong tea extract, Junshan Yinzhen tea extract, Beigang Maojian tea extract, Pingyang Huangtang tea extract, white peony tea extract, Shoumei tea extract and Gongmei tea extract in a ratio of 4:3:3:2:3:1:6:3.

[0034] The composition is prepared by the following preparation method:

[0035] S1. Prepare oolong tea extract, weigh narcissus tea, Qilan tea and phoenix single fir tea in a ratio of 4:3:3, mix them with 75% ethanol aqueous solution at a solid-liquid ratio of 1:40, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm at 0-5°C for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution at a solid-liquid ratio of 1:40, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm at 0-5°C for low-temperature alcohol extraction, obtain a second filtrate and a second The first filtrate, the second filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:40, and the mixture is placed in a high-voltage pulse electric field with an intensity of 20 kV / cm at a temperature of 0 to 5°C for low-temperature alcohol extraction to obtain a third filtrate and a third filtrate, the third filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:40, and the mixture is placed in a high-voltage pulse electric field with an intensity of 25 kV / cm at a temperature of 0 to 5°C for low-temperature alcohol extraction to obtain a fourth filtrate and a fourth filtrate, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain an oolong tea extract;

[0036] S2. Prepare yellow tea extract, weigh Junshan Yinzhen tea, Beigang Maojian tea and Pingyang Huangtang tea in a ratio of 2:3:5, mix them with 75% ethanol aqueous solution at a solid-liquid ratio of 1:40, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm at 0-5°C for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution at a solid-liquid ratio of 1:40, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm at 0-5°C for low-temperature alcohol extraction, obtain a second filtrate and the second filter residue, the second filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:40, and placed in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, the third filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:40, and placed in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a yellow tea extract;

[0037] S3, prepare white tea extract, weigh white peony tea, Shoumei tea and Gongmei tea in a ratio of 1:6:3, mix with 75% ethanol aqueous solution, solid-liquid ratio of 1:40, place in a high-voltage pulse electric field with an intensity of 10kV / cm at 0-5℃ for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution, solid-liquid ratio of 1:40, place in a high-voltage pulse electric field with an intensity of 15kV / cm at 0-5℃ for low-temperature alcohol extraction, obtain a second filtrate and a second The filter residue, the second filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:40, and placed in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, the third filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:40, and placed in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a white tea extract;

[0038] S4, mixing the oolong tea extract obtained in S1, the yellow tea extract obtained in S2 and the white tea extract obtained in S3 in a ratio of 1:1:1 to obtain a washable plant dye composition.

[0039] Example 3

[0040] A washable plant dye composition comprises narcissus tea extract, Qilan tea extract, Fenghuang Dancong tea extract, Junshan Yinzhen tea extract, Beigang Maojian tea extract, Pingyang Huangtang tea extract, white peony tea extract, Shoumei tea extract and Gongmei tea extract in a ratio of 4:3:3:2:3:1:6:3.

[0041] The composition is prepared by the following preparation method:

[0042] S1. Prepare oolong tea extract, weigh narcissus tea, Qilan tea and phoenix single fir tea in a ratio of 4:3:3, mix them with 75% ethanol aqueous solution at a solid-liquid ratio of 1:50, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm at 0-5°C for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution at a solid-liquid ratio of 1:50, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm at 0-5°C for low-temperature alcohol extraction, obtain a second filtrate and a second The first filtrate, the second filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:50, and the mixture is placed in a high-voltage pulse electric field with an intensity of 20 kV / cm at a low temperature of 0-5°C for alcohol extraction to obtain a third filtrate and a third filtrate, the third filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:50, and the mixture is placed in a high-voltage pulse electric field with an intensity of 25 kV / cm at a low temperature of 0-5°C for alcohol extraction to obtain a fourth filtrate and a fourth filtrate, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain an oolong tea extract;

[0043] S2. Prepare yellow tea extract, weigh Junshan Yinzhen tea, Beigang Maojian tea and Pingyang Huangtang tea in a ratio of 2:3:5, mix them with 75% ethanol aqueous solution at a solid-liquid ratio of 1:50, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm at 0-5°C for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution at a solid-liquid ratio of 1:50, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm at 0-5°C for low-temperature alcohol extraction, obtain a second filtrate and the second filter residue, the second filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:50, and placed in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, the third filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:50, and placed in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a yellow tea extract;

[0044] S3, prepare white tea extract, weigh white peony tea, Shoumei tea and Gongmei tea in a ratio of 1:6:3, mix with 75% ethanol aqueous solution, solid-liquid ratio of 1:50, place in a high-voltage pulse electric field with an intensity of 10kV / cm at 0-5℃ for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution, solid-liquid ratio of 1:50, place in a high-voltage pulse electric field with an intensity of 15kV / cm at 0-5℃ for low-temperature alcohol extraction, obtain a second filtrate and a second The first filtrate, the second filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:50, and the mixture is placed in a high-voltage pulse electric field with an intensity of 20 kV / cm at a low temperature of 0-5°C for alcohol extraction to obtain a third filtrate and a third filtrate, the third filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:50, and the mixture is placed in a high-voltage pulse electric field with an intensity of 25 kV / cm at a low temperature of 0-5°C for alcohol extraction to obtain a fourth filtrate and a fourth filtrate, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a white tea extract;

[0045] S4, mixing the oolong tea extract obtained in S1, the yellow tea extract obtained in S2 and the white tea extract obtained in S3 in a ratio of 1:1:1 to obtain a washable plant dye composition.

[0046] Comparative Example 1

[0047] A washable plant dye composition comprises narcissus tea extract, Qilan tea extract, Fenghuang Dancong tea extract, Junshan Yinzhen tea extract, Beigang Maojian tea extract, Pingyang Huangtang tea extract, white peony tea extract, Shoumei tea extract and Gongmei tea extract in a ratio of 4:3:3:2:3:1:6:3.

[0048] The composition is prepared by the following preparation method:

[0049] S1. Prepare oolong tea extract, weigh narcissus tea, Qilan tea and phoenix single fir tea in a ratio of 4:3:3, mix them with 75% ethanol aqueous solution at a solid-liquid ratio of 1:10, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm and perform low-temperature alcohol extraction at 0-5°C, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution at a solid-liquid ratio of 1:10, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm and perform low-temperature alcohol extraction at 0-5°C, obtain a second filtrate and a second The filter residue, the second filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:10, and placed in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, the third filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:10, and placed in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain an oolong tea extract;

[0050] S2. Prepare yellow tea extract, weigh Junshan Yinzhen tea, Beigang Maojian tea and Pingyang Huangtang tea in a ratio of 2:3:5, mix with 75% ethanol aqueous solution, solid-liquid ratio of 1:10, place in a high-voltage pulse electric field with an intensity of 10 kV / cm at 0-5 ° C for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, the first filter residue is mixed with 75% ethanol aqueous solution, solid-liquid ratio of 1:10, place in a high-voltage pulse electric field with an intensity of 15 kV / cm at 0-5 ° C for low-temperature alcohol extraction to obtain a second filtrate and the second filter residue, the second filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:10, and placed in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, the third filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:10, and placed in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a yellow tea extract;

[0051] S3, prepare white tea extract, weigh white peony tea, Shoumei tea and Gongmei tea in a ratio of 1:6:3, mix with 75% ethanol aqueous solution, solid-liquid ratio of 1:10, place in a high-voltage pulse electric field with an intensity of 10kV / cm at 0-5℃ for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution, solid-liquid ratio of 1:10, place in a high-voltage pulse electric field with an intensity of 15kV / cm at 0-5℃ for low-temperature alcohol extraction, obtain a second filtrate and a second The filter residue, the second filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:10, and placed in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, the third filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:10, and placed in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a white tea extract;

[0052] S4, mixing the oolong tea extract obtained in S1, the yellow tea extract obtained in S2 and the white tea extract obtained in S3 in a ratio of 1:1:1 to obtain a washable plant dye composition.

[0053] Comparative Example 2

[0054] A washable plant dye composition comprises narcissus tea extract, Qilan tea extract, Fenghuang Dancong tea extract, Junshan Yinzhen tea extract, Beigang Maojian tea extract, Pingyang Huangtang tea extract, white peony tea extract, Shoumei tea extract and Gongmei tea extract in a ratio of 4:3:3:2:3:1:6:3.

[0055] The composition is prepared by the following preparation method:

[0056] S1. Prepare oolong tea extract, weigh narcissus tea, Qilan tea and phoenix single fir tea in a ratio of 4:3:3, mix them with 75% ethanol aqueous solution at a solid-liquid ratio of 1:20, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm at 0-5°C for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution at a solid-liquid ratio of 1:20, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm at 0-5°C for low-temperature alcohol extraction, obtain a second filtrate and a second The first filtrate, the second filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:20, and the mixture is placed in a high-voltage pulse electric field with an intensity of 20 kV / cm at a low temperature of 0-5°C for alcohol extraction to obtain a third filtrate and a third filtrate, the third filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:20, and the mixture is placed in a high-voltage pulse electric field with an intensity of 25 kV / cm at a low temperature of 0-5°C for alcohol extraction to obtain a fourth filtrate and a fourth filtrate, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain an oolong tea extract;

[0057] S2. Prepare yellow tea extract, weigh Junshan Yinzhen tea, Beigang Maojian tea and Pingyang Huangtang tea in a ratio of 2:3:5, mix with 75% ethanol aqueous solution, solid-liquid ratio of 1:20, place in a high-voltage pulse electric field with an intensity of 10 kV / cm at 0-5 ° C for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, the first filter residue is mixed with 75% ethanol aqueous solution, solid-liquid ratio of 1:20, place in a high-voltage pulse electric field with an intensity of 15 kV / cm at 0-5 ° C for low-temperature alcohol extraction to obtain a second filtrate and the second filter residue, the second filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:20, and placed in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, the third filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:20, and placed in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a yellow tea extract;

[0058] S3, prepare white tea extract, weigh white peony tea, Shoumei tea and Gongmei tea in a ratio of 1:6:3, mix with 75% ethanol aqueous solution, solid-liquid ratio of 1:20, place in a high-voltage pulse electric field with an intensity of 10kV / cm at 0-5℃ for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution, solid-liquid ratio of 1:20, place in a high-voltage pulse electric field with an intensity of 15kV / cm at 0-5℃ for low-temperature alcohol extraction, obtain a second filtrate and a second The filter residue, the second filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:20, and placed in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, the third filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:20, and placed in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a white tea extract;

[0059] S4, mixing the oolong tea extract obtained in S1, the yellow tea extract obtained in S2 and the white tea extract obtained in S3 in a ratio of 1:1:1 to obtain a washable plant dye composition.

[0060] Comparative Example 3

[0061] A washable plant dye composition comprises narcissus tea extract, Qilan tea extract, Fenghuang Dancong tea extract, Junshan Yinzhen tea extract, Beigang Maojian tea extract, Pingyang Huangtang tea extract, white peony tea extract, Shoumei tea extract and Gongmei tea extract in a ratio of 4:3:3:2:3:1:6:3.

[0062] The composition is prepared by the following preparation method:

[0063] S1. Prepare oolong tea extract, weigh narcissus tea, Qilan tea and Phoenix single fir tea in a ratio of 4:3:3, mix them with 75% ethanol aqueous solution at a solid-liquid ratio of 1:60, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm at 0-5°C for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution at a solid-liquid ratio of 1:60, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm at 0-5°C for low-temperature alcohol extraction, obtain a second filtrate and a second The first filtrate, the second filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:60, and the mixture is placed in a high-voltage pulse electric field with an intensity of 20 kV / cm at a temperature of 0 to 5°C for low-temperature alcohol extraction to obtain a third filtrate and a third filtrate, the third filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:60, and the mixture is placed in a high-voltage pulse electric field with an intensity of 25 kV / cm at a temperature of 0 to 5°C for low-temperature alcohol extraction to obtain a fourth filtrate and a fourth filtrate, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain an oolong tea extract;

[0064] S2. Prepare yellow tea extract, weigh Junshan Yinzhen tea, Beigang Maojian tea and Pingyang Huangtang tea in a ratio of 2:3:5, mix with 75% ethanol aqueous solution, solid-liquid ratio of 1:60, place in a high-voltage pulse electric field with an intensity of 10 kV / cm at 0-5 ° C for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, the first filter residue is mixed with 75% ethanol aqueous solution, solid-liquid ratio of 1:60, place in a high-voltage pulse electric field with an intensity of 15 kV / cm at 0-5 ° C for low-temperature alcohol extraction to obtain a second filtrate and the second filter residue, the second filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:60, and placed in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, the third filter residue is mixed with a 75% ethanol aqueous solution at a solid-liquid ratio of 1:60, and placed in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a yellow tea extract;

[0065] S3, prepare white tea extract, weigh white peony tea, Shoumei tea and Gongmei tea in a ratio of 1:6:3, mix with 75% ethanol aqueous solution, solid-liquid ratio of 1:60, place in a high-voltage pulse electric field with an intensity of 10kV / cm at 0-5℃ for low-temperature alcohol extraction, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution, solid-liquid ratio of 1:60, place in a high-voltage pulse electric field with an intensity of 15kV / cm at 0-5℃ for low-temperature alcohol extraction, obtain a second filtrate and a second The first filtrate, the second filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:60, and the mixture is placed in a high-voltage pulse electric field with an intensity of 20 kV / cm at a temperature of 0 to 5°C for low-temperature alcohol extraction to obtain a third filtrate and a third filtrate, the third filtrate and the 75% ethanol aqueous solution are mixed at a solid-liquid ratio of 1:60, and the mixture is placed in a high-voltage pulse electric field with an intensity of 25 kV / cm at a temperature of 0 to 5°C for low-temperature alcohol extraction to obtain a fourth filtrate and a fourth filtrate, and the first filtrate, the second filtrate, the third filtrate and the fourth filtrate are combined to obtain a white tea extract;

[0066] S4, mixing the oolong tea extract obtained in S1, the yellow tea extract obtained in S2 and the white tea extract obtained in S3 in a ratio of 1:1:1 to obtain a washable plant dye composition.

[0067] In order to better illustrate the advantages of the present invention, the verification scheme provided by the present invention is given below:

[0068] Performance Test:

[0069] The performance of the washable plant dye compositions obtained in the above Examples 1-3 and Comparative Examples 1-3 was evaluated. The K / S value was measured using the SF600X colorimeter of DataColor Company of the United States; the color fastness to washing was tested with reference to GB / T5713-2013 "Textiles - Tests for Color Fastness to Water"; the color fastness to soaping was tested with reference to GB / T3921-2008 "Textiles - Tests for Color Fastness to Soaping"; the color fastness to dry rubbing was tested with reference to GB / T3920-2008 "Textiles - Tests for Color Fastness to Rubbing", and the specific data are shown in Table 1.

[0070] Table 1. Performance test results

[0071] K / S value Color fastness to washing / grade Color fastness to soap washing / grade Color fastness to dry rubbing / grade Example 1 14.65 5 4-5 5 Example 2 14.72 5 5 5 Example 3 14.85 5 5 4-5 Comparative Example 1 7.32 3 3 3 Comparative Example 2 7.41 3 3 3 Comparative Example 3 7.57 3 3 3

[0072] It can be seen from Table 1 that the washable plant dye composition prepared in the embodiments of the present invention has excellent performance. Compared with the K / S value, color fastness to soap washing, and color fastness to dry rubbing of comparative examples 1-3, the K / S value, color fastness to soap washing, and color fastness to dry rubbing of embodiments 1-3 are better.

[0073] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A washable plant dye composition, characterized in that: The composition consists of oolong tea extract, yellow tea extract and white tea extract.

2. The washable plant dye composition according to claim 1, characterized in that: The composition ratio of the oolong tea extract, the yellow tea extract and the white tea extract in the composition is 1:1:

1.

3. The washable plant dye composition according to claim 1, characterized in that: The oolong tea extract consists of narcissus tea extract, Qilan tea extract and phoenix dancong tea extract.

4. The washable plant dye composition according to claim 3, characterized in that: The composition ratio of the narcissus tea extract, the Qilan tea extract and the phoenix dancong tea extract in the oolong tea extract is 4:3:

3.

5. The washable plant dye composition according to claim 1, characterized in that: The yellow tea extract consists of Junshan Yinzhen tea extract, Beigang Maojian tea extract and Pingyang Huangtang tea extract.

6. The washable plant dye composition according to claim 5, characterized in that: The composition ratio of Junshan Yinzhen tea extract, Beigang Maojian tea extract and Pingyang Huangtang tea extract in the yellow tea extract is 2:3:

5.

7. The washable plant dye composition according to claim 1, characterized in that: The white tea extract consists of white peony tea extract, Shoumei tea extract and Gongmei tea extract.

8. The washable plant dye composition according to claim 7, characterized in that: The composition ratio of the white peony tea extract, the Shoumei tea extract and the Gongmei tea extract in the white tea extract is 1:6:

3.

9. A method for preparing the washable plant dye composition according to any one of claims 1 to 8, characterized in that: Prepared by the following steps: S1, preparing oolong tea extract, weighing narcissus tea, Qilan tea and phoenix single fir tea in proportion, mixing them with 75% ethanol aqueous solution, placing them in a high-voltage pulse electric field with an intensity of 10 kV / cm for low-temperature alcohol extraction at 0-5°C, filtering to obtain a first filtrate and a first filter residue, mixing the first filter residue with 75% ethanol aqueous solution, placing them in a high-voltage pulse electric field with an intensity of 15 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a second filtrate and a second filter residue, mixing the second filter residue with 75% ethanol aqueous solution, placing them in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, mixing the third filter residue with 75% ethanol aqueous solution, placing them in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, combining the first filtrate, the second filtrate, the third filtrate and the fourth filtrate to obtain an oolong tea extract; S2, prepare yellow tea extract, weigh Junshan Yinzhen tea, Beigang Maojian tea and Pingyang Huangtang tea in proportion, mix them with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm for low-temperature alcohol extraction at 0-5°C, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a second filtrate and a second filter residue, mix the second filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, mix the third filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, combine the first filtrate, the second filtrate, the third filtrate and the fourth filtrate to obtain a yellow tea extract; S3, prepare white tea extract, weigh white peony tea, Shoumei tea and Gongmei tea in proportion, mix them with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 10 kV / cm for low-temperature alcohol extraction at 0-5°C, filter to obtain a first filtrate and a first filter residue, mix the first filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 15 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a second filtrate and a second filter residue, mix the second filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 20 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a third filtrate and a third filter residue, mix the third filter residue with 75% ethanol aqueous solution, place them in a high-voltage pulse electric field with an intensity of 25 kV / cm for low-temperature alcohol extraction at 0-5°C to obtain a fourth filtrate and a fourth filter residue, combine the first filtrate, the second filtrate, the third filtrate and the fourth filtrate to obtain a white tea extract; S4, mixing the oolong tea extract obtained in S1, the yellow tea extract obtained in S2 and the white tea extract obtained in S3 in proportion to obtain a water-resistant plant dye composition.

10. The preparation method according to claim 9, characterized in that: The solid-liquid ratio of the raw material to the extraction solvent in S1 to S3 is 1:(30-50).