JPH01124691A - Dyeing method by coloring matter in food - Google Patents

Abstract

PURPOSE: To inexpensively obtain a safe dyed textile product having no adverse effect on the skin by dyeing a textile product with tannins and coloring matter in foods (e.g. vegetables, fruits). CONSTITUTION: The subject dyeing method comprises the steps wherein coloring matter is extracted from vegetables and/or fruits containing the coloring matter such as anthocyanins or carotenoids with water or an alcohol, a natural textile product such as of silk or cotton is then immersed in a solution of the coloring matter thus extracted, and subsequently treated with a solution containing small amounts of natural or synthetic tannins extracted from gallnut, persimmon, or the like. The above dyeing treatment may be carried out through either one of the following steps: the textile product is immersed in a dyeing extract solution and then treated with tannins, or vice versa, or treated in a solution as a mixture of the above two solutions. Being hygienically safe, this method is suitable, in particular for underwear, infant clothing, and the like.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method for dyeing food products using pigments in foods, and more specifically, it relates to dyeing methods for dyeing textile products such as underwear that are applied directly to the skin as food products that are not likely to have an adverse effect on the skin. This invention relates to a dyeing method for easily, inexpensively, favorably, and safely dyeing with a dye.

[Conventional technology]

In recent years, colorful items have been widely used not only in outwear but also in underwear that is worn directly on the skin. However,
For items such as underwear that are in constant contact with the skin, the material, processing method, and pigments used for dyeing may have various effects on the skin, so special consideration should be given to underwear for infants and young children. is desired.

Therefore, natural dyes, which are safer than synthetic dyes, are used to dye these underwear, such as so-called vegetable dyeing, which uses natural dyes such as safflower and purple root.

[Problem that the invention seeks to solve]

However, many of the natural dyes used for vegetable dyeing, such as safflower and purple roots, are difficult to obtain and expensive, and the dyeing methods are complicated, making it difficult to dye easily and inexpensively.

[Means for Solving the Problems] This invention was made as a result of intensive research in view of the current situation, and involves extracting pigments from familiar vegetables and fruits that are eaten on a daily basis, and converting these pigments into tannins. When used in combination with other dyes, underwear, etc. can be dyed easily, inexpensively, satisfactorily, and safely using dyes found in foods that do not pose a risk of adversely affecting the skin.

The pigments used in this invention are pigments contained in foods, and most of them are andocyanates and carotenoids, which are the safest for humans and are easily available. In addition, the pigments contained in this food are
When used alone, it dyes natural fibers such as silk and cotton, but it cannot be used as a practical dye because it is susceptible to washing and heating. However, when used with small amounts of tannins, it dyes natural fibers such as silk and cotton. It dyes well, is resistant to washing, heating, etc., and can withstand practical use. Therefore, by using food pigments together with tannins, the fibers of underwear can be dyed well and easily, and safe and colorful underwear can be obtained without the risk of adverse effects on the skin. .

Dyeing that uses pigments and tannins contained in foods involves dyeing the fibers in a dye bath containing the pigments and tannins contained in foods, as well as pre-treating the fibers with tannins.
It can also be done by dyeing in a dye bath containing food pigments, or by dyeing the fibers in a dye bath containing food pigments and then post-processing with tannins. When these dyes are used together with food dyes, they are well adsorbed onto natural fibers such as silk and cotton due to the action of tannins, which prevents the dyes from falling off the fibers during washing, and the decomposition and elution of the dyes due to water vapor. There are no such problems, and the dyeing is sufficiently durable for practical use, and the colors of vegetables and fruits are dyed as they are.

Extraction of pigments contained in foods is carried out by adding an appropriate amount of water to colored vegetables or fruits, cutting them into small pieces using a mixer, etc., and filtering or squeezing them with a cloth to separate the solid residue.The resulting filtrate is It is used as it is, or diluted with water to the required concentration to make a dye solution, and used for dip dyeing or draw dyeing. Furthermore, depending on the type of vegetable, the pigment is extracted with alcohol or acetone, which is then diluted with water and used as a dye solution. Vegetables and fruits from which pigments can be extracted in this way include, for example, red radish, red radish, grapes, red shiso, red cabbage, kapocha, spinach, orange pulp, seeds of purple vine, and citrus fruit. Any colored vegetables or fruits, such as fruit pulp, can be suitably used.

In addition, as tannins used together with pigments contained in foods, both natural tannins extracted and purified from quince, persimmons, tea leaves, etc., and synthetic tannins are preferably used, and these tannins are pyrogallol tannins. It does not matter whether there is catechol tannin or not. The amount used is preferably within the range of 5 to 15% by weight based on the fiber to be dyed; if it is less than 5% by weight, the dyeing with the pigments contained in food cannot be done well, and if it is too much, it will cause tannins. It is not preferable because the color comes out.

Dyeing using dyes found in foods together with tannins is carried out using methods such as dip dyeing, draw dyeing, and textile printing. It is diluted and used as a dye bath for dip dyeing or draw dyeing. At this time, it is preferable to add a small amount of acetic acid or hydrochloric acid as necessary to adjust the pH of the dye bath to a weak acidity of 7 or less, and more preferably to a pH of 4 to 3. At this time, if the fibers are pretreated with tannins and then dyed with a dye bath containing food pigments, or after the fibers are dyed with a dye bath containing food pigments and then post-treated with tannins, The pH may be adjusted during pre-treatment or post-treatment with tannins, or when dyeing with a dye bath containing food pigments.

In addition, when dyeing is carried out by dyeing, the bath ratio is usually 1
The dyed cloth or thread is dyed with tartarite (antimony potassium tartrate) and dyed at 60-80°C for 1-5 hours. ) in a 0.5-2% solution, preferably a 1% solution, to fix tannins, followed by washing with water and drying. At this time, if necessary, mordant may be carried out using a mordant such as aluminum acetate before fixing the tannins.

Furthermore, in the case of drag dyeing, the dye bath is prepared in the same way as for dip dyeing, except that the degree of dilution of the dye solution is reduced.
This is dyed, and after drying, a 1% aqueous solution of tartarite is layered and steamed for 15 to 30 minutes at a temperature of 100°C or higher to fix the pigment and tannins, washed with water, and dried. It will be done as follows. In addition, when mordanting is carried out, after dyeing in a dye bath, an aqueous mordant solution such as a 2% aqueous solution of aluminum acetate is repeatedly drawn.

Fibers dyed in this way include silk, wool,
Natural fibers such as cotton and linen are particularly preferred, and both white cloth and yarn made of these fibers are well dyed.

〔Example] Next, embodiments of the invention will be described.

Example 1 Remove the skin from 1.5 kg of Changan Blue Maru Red Heart Radish, and add 1 part to 6 parts.
After adding 2 parts of water, it was squeezed with a cloth to obtain about 21 parts of dye solution.

Then, a 10% aqueous solution of tannin 11 and acetic acid 100 m
! ! , was added to prepare a dye bath.

1 kg of white silk cloth was placed in this dye bath and dyed in Kanto color at 60 to 70°C for about 1 hour.The cloth was then immersed in a 1% aqueous solution of tartarite for 10 minutes at room temperature, washed with water, and dried.

The silk cloth obtained by dyeing in this manner was dyed in a purplish red color.

Example 2 In Example 1, instead of the Chang'an Blue Maru Red Heart Radish, 500 g of the peel of Grape @ (Berry A, dark reddish-purple) was collected, 1.81 g of water was added to it, cut into small pieces, and squeezed with a cloth. A white silk cloth was dyed in the same manner as in Example 1, except that approximately 21 dye solutions were obtained. The silk fabric dyed in this manner was dyed purple.

Example 3 In Example 1, 400 g of red perilla leaves were collected instead of the Chang'an Blue Maru Red Heart Radish, 1.82 g of water was added to it, cut into pieces, and squeezed with a cloth to obtain a dye solution of about 21. Except for this, a white silk cloth was dyed in the same manner as in Example 1. The silk fabric dyed in this manner was dyed purple.

Example 4 In Example 1, 300g of red cabbage was collected instead of Chang'an Blue Maru Red Heart Radish, 1.81 g of water was added to it, cut into pieces, and squeezed with a cloth to obtain a dye solution of about 21. The white fabric was dyed in the same manner as in Example 1. The silk fabric dyed in this manner was dyed blue-purple.

Example 5 In Example 1, 400 g of Kapocha was collected instead of Chang'an Blue Maru Red Heart Radish, 1.81 g of water was added to it, cut into pieces, and squeezed with a cloth to obtain a dye solution of about 22. A white silk cloth was dyed in the same manner as in Example 1. The silk cloth obtained by dyeing in this manner was dyed reddish yellow.

Example 6 In Example 1, 400 g of spinach was collected instead of Chang'an Blue Maru Red Heart Radish, 1.82 g of water was added to it, cut into pieces, and squeezed with a cloth to obtain a dye solution of about 22 g. A white silk cloth was dyed in the same manner as in Example 1. The silk cloth obtained by dyeing in this manner was dyed yellow-green.

Example 7 In Example 1, 400g of orange pulp was collected instead of the Chang'an Blue Maru Red Heart Radish, 1.71 g of water was added to it, cut into pieces, and squeezed with a cloth to obtain a dye solution of about 21. A white silk cloth was dyed in the same manner as in Example 1. The silk cloth obtained by dyeing in this manner was dyed yellow.

Example 8 In Example 1, instead of the Chang'an Aomaru Red Heart Radish, 400g of vine purple seeds were collected, 1.82% of water was added to it, cut into pieces, and squeezed with a cloth to give about 2.0% of the seeds. Except for obtaining the dye solution of
A white silk cloth was dyed in the same manner as in Example 1. The silk fabric dyed in this manner was dyed reddish-purple.

Example 9 In Example 1, 400g of Kiilai fruit pulp was collected instead of the Chang'an Blue Maru Red Heart Radish, and 1.71 g of water was added to it, cut into pieces, and squeezed with a cloth to obtain a dye solution of about 21. Except for this, a white silk cloth was dyed in the same manner as in Example 1. The silk cloth obtained by dyeing in this manner was dyed yellowish green.

Example 10 After dyeing a white silk cloth in the same manner as in Example 2, it was immersed in a 2% aqueous solution of aluminum acetate at room temperature for about 20 minutes, and then in a 1% aqueous solution of tartarite for about 10 minutes at room temperature. After soaking, it was washed with water, dried, and dyed. The silk fabric dyed in this manner was dyed blue-purple.

Example 11 After dyeing a white silk cloth in the same manner as in Example 3, it was immersed in a 2% aqueous solution of aluminum acetate at room temperature for about 20 minutes, and then in a 1% aqueous solution of tartarite at room temperature for about 10 minutes. After that, it was washed with water, dried and dyed. The silk fabric dyed in this manner was dyed blue-purple.

Example 12 The skin of 1,5 kg of Chang'an Blue Maru Red Heart Radish was removed, and 6 parts to 12 parts of water were added, and then squeezed with a cloth to obtain a dye solution of about 21 parts.

Next, 500 m2 of a 10% aqueous tannin solution and 50 m2 of acetic acid were added to prepare a dye bath.

A white silk cloth was dyed using this dye bath, and after drying, a 1% aqueous solution of tartarite was applied over and over again, and then steamed at 100° C. or higher for 30 minutes. The silk cloth obtained by dyeing in this manner was dyed in a purplish red color.

Example 13 500 g of fruit skin of Grape @ (Berry A, dark reddish purple) was collected,
1.82 ml of water was added to this, cut into pieces, and squeezed with a cloth to obtain a dye solution of about 21 ml.

Then 500 ml of a 10% aqueous solution of tannin and 5 ml of acetic acid
0 mf was added to prepare a dye bath.

A white silk cloth was dyed using this dye bath, and after drying, a 1% aqueous solution of tartarite and a 2% aqueous solution of aluminum acetate were layered and steamed at 100° C. or higher for 30 minutes. The silk fabric dyed in this manner was dyed blue-purple.

Example 14 In Example 13, 400 red perilla leaves were used instead of grapes.
Collect 1.8 g of water, add 1.82 g of water to it, cut it into small pieces, and squeeze it with a cloth to get about 21! Example 13 except that a dye solution of .
In the same manner as above, a piece of white silk cloth was dyed. The silk fabric dyed in this manner was dyed blue-purple.

Example 15 A white cotton cloth was dyed in the same manner as in Example 1, except that a white cotton cloth was used instead of a white silk cloth. The cotton cloth obtained by dyeing in this manner was dyed purplish red.

Example 16 A white cotton cloth was dyed in the same manner as in Example 2, except that a white cotton cloth was used instead of a white silk cloth. The cotton cloth obtained by dyeing in this manner was dyed purple.

Example 17 A white cotton cloth was dyed in the same manner as in Example 3, except that a white cotton cloth was used instead of a white silk cloth. The cotton cloth obtained by dyeing in this manner was dyed purple.

Example 18 A white cotton cloth was dyed in the same manner as in Example 4, except that a white cotton cloth was used instead of a white silk cloth. The cotton cloth obtained by dyeing in this manner was dyed blue-purple.

Example 19 A white cotton cloth was dyed in the same manner as in Example 5, except that a white cotton cloth was used instead of a white silk cloth. The cotton cloth obtained by dyeing in this manner was dyed reddish yellow.

Example 20 A white cotton cloth was dyed in the same manner as in Example 10, except that a white cotton cloth was used instead of a white silk cloth. The cotton cloth obtained by dyeing in this manner was dyed blue-purple.

Example 21 A white cotton cloth was dyed in the same manner as in Example 11, except that a white cotton cloth was used instead of the silky cloth. The cotton cloth obtained by dyeing in this manner was dyed blue-purple.

Example 22 A white cotton cloth was dyed in the same manner as in Example 12, except that a white cotton cloth was used in place of the silky cloth. The cotton cloth obtained by dyeing in this manner was dyed purplish red.

Example 23 A white wool cloth was dyed in the same manner as in Example 1, except that a white wool cloth was used instead of the silky cloth. The woolen fabric dyed in this manner was dyed purplish red.

Example 24 A white wool cloth was dyed in the same manner as in Example 2, except that a white wool cloth was used in place of the silky cloth. The wool fabric dyed in this manner was dyed purple.

Example 25 A white wool cloth was dyed in the same manner as in Example 3, except that a white wool cloth was used instead of the silky cloth. The wool fabric dyed in this manner was dyed purple.

Example 26 A white wool cloth was dyed in the same manner as in Example 4, except that a white wool cloth was used instead of the silky cloth. The wool fabric dyed in this manner was dyed blue-purple.

Comparative Example 1 A silk cloth was dyed in the same manner as in Example 1, except that the addition of tannin was omitted in the preparation of the dye bath in Example 1, and a silk cloth dyed in purplish red was obtained.

Comparative Example 2 Silky cloth was dyed in the same manner as in Example 2, except that the addition of tannin was omitted in the preparation of the dye bath in Example 2, and a purple-dyed silk cloth was obtained.

Comparative Example 3 Silky cloth was dyed in the same manner as in Example 3, except that the addition of tannin was omitted in the preparation of the dye bath in Example 3, and a purple-dyed silk cloth was obtained.

Comparative Example 4 A silk cloth was dyed in the same manner as in Example 4, except that the addition of tannin was omitted in the preparation of the dye bath in Example 4, and a silk cloth dyed blue-purple was obtained.

Comparative Example 5 A silk cloth was dyed in the same manner as in Example 5, except that the addition of tannin was omitted in the preparation of the dye bath in Example 5, and a silk cloth dyed reddish yellow was obtained.

Comparative Example 6 A silk cloth was dyed in the same manner as in Example 6, except that the addition of tannin was omitted in the preparation of the dye bath in Example 6, and a yellow-green silk cloth was obtained.

Comparative Example 7 A silk cloth was dyed in the same manner as in Example 7, except that the addition of tannin was omitted in the preparation of the dye bath in Example 7, and a yellow dyed silk cloth was obtained.

Comparative Example 8 Silky cloth was dyed in the same manner as in Example 10, except that the addition of tannin was omitted in the preparation of the dye bath in Example 10, to obtain a silk cloth dyed blue-purple.

Comparative Example 9 Silky cloth was dyed in the same manner as in Example 12, except that the addition of tannin was omitted in the preparation of the dye bath in Example 12, and a silk cloth dyed in purplish red was obtained.

Comparative Example 10 A silk cloth was dyed in the same manner as in Example 14, except that the addition of tannin was omitted in the preparation of the dye bath in Example 14, and a silk cloth dyed blue-purple was obtained.

Comparative Example 11 A white cotton cloth was dyed in the same manner as in Example 15, except that the addition of tannin was omitted in the preparation of the dye bath in Example 15, to obtain a cotton cloth dyed in purplish red.

Comparative Example 12 A white cotton cloth was dyed in the same manner as in Example 17, except that the addition of tannin was omitted in the preparation of the dye bath in Example 17, and a purple-dyed cotton cloth was obtained.

Comparative Example 13 A white cotton fabric was dyed in the same manner as in Example 20, except that the addition of tannin was omitted in the preparation of the dye bath in Example 20, and a blue-purple dyed cotton fabric was obtained.

Comparative Example 14 A white wool cloth was dyed in the same manner as in Example 23, except that the addition of tannin was omitted in the preparation of the dye bath in Example 23, to obtain a wool cloth dyed in purplish red.

Examples 1-7.10.12.14.15.17.20.
Regarding the dyed fabrics obtained in No. 23 and Comparative Examples 1 to 14,
A washing fastness test was conducted. Washing fastness test is JISLO
844-70, and the degree of discoloration and fading is 1 to 5.
Evaluated by grade.

Table 1 below shows the results.

Table 1 [Effects of the Invention] As is clear from Table 1 above, silk, cotton and wool dyed by the method of this invention (Examples 1 to 7.1O112
, 14, 15, 17, 20, 23) are Comparative Examples 1 to 14
Compared to silk, cotton, and wool dyed with dyes, all of them have better washing fastness, and therefore, according to the method of the present invention,
It can be seen that fibers can be dyed well with dyes in food.

In addition, dyeing using this method uses food dyes that are the safest for humankind and are easily available, making it easy and inexpensive to dye underwear that is safe and healthy. There is no risk of environmental pollution due to dyeing wastewater, and industrially excellent dyeing can be performed.

Claims (1)

[Scope of Claims] 1. A method for dyeing fibers using pigments in foods, which is characterized by dyeing fibers using pigments in foods and tannins. 2. After pre-treating fibers with tannins, A method 3 for dyeing with food dyes according to claim 1, in which fibers are dyed in a dye bath containing dyes; Claim 1, in which fibers are dyed in a dye bath containing food dyes and tannins. Method 4 for dyeing with food pigments as described in Claim 1, wherein the fibers are dyed in a dye bath containing food pigments and then post-treated with tannins.