JPS6264866A - Method of dyeing with yellow coloring matter of safflower - Google Patents

Abstract

PURPOSE:To dye textile goods at low cost similarly to dyeing with a vermilion coloring matter, by dyeing them with a water-soluble yellow coloring manner discarded in the manufacture of the vermilion coloring matter from safflower and then coloring with H2O2. CONSTITUTION:Natural fibers or their regenerated fibers (e.g. cotton) are dyed by rubbing directly into them yellow buds, pedals at the beginning of flowering or flowers with hoods of yellow safflower, or by immersing them in an aq. soln. of coloring matter discarded as a waste liquor in the manufacture of vermilion coloring matter from safflower. Thereafter, they are dyed in vermilion by treating them with a 30% aq. soln. of H2O2. If necessary, a treatment with a metal salt before or after treating with H2O2 will result in dyeing in violet, vermilion or gold brown depending on the nature of the metal.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION The present invention relates to the use of safflower (Carthamus tinetri).
The purpose of this method is to use water-soluble yellow dye, which was discarded when producing red pigment from Asteraceae (US L, Asteraceae), to obtain the same dyeing effect as dyed with red pigment. It's cheaper.

The water-soluble yellow pigment contained in safflower buds and blooming flowers used in the present invention is different from the conventionally recognized safrole yellow.

The yellow pigment of the present invention is carthamin, which is described on pages 7.27-72 of "Latest Phytochemistry" by Tatsuo Karimai, published by Koyo Shoten, February 1947.

Hereinafter, in the present invention, this pigment will be referred to as yellow pigment.

Industrial applications The present invention is applied to the field of dyeing using natural dyes.

Conventional technology In the past, when there were no chemical dyes, natural dyes were used to dye fibers by researching different dyeing methods, but it was time-consuming to produce raw materials for natural dyes, and dyeing took time. After chemical dyes were created, their use rapidly declined due to their low fastness and hardness.

However, recently it has become popular again due to the non-toxicity of natural dyes, the softness of the colors that Japanese people like, and the ingenuity of dyeing methods.

Traditionally, safflower dyeing involves picking the petals and processing them into safflower mochi, or simply extracting the safflower pigment from the dried flowers with an alkali, soaking the dyeable material in this solution, and neutralizing it by adding acid dropwise. However, a method of dyeing was used.

(September 1960, Yamagata University professor Yoshikazu Yoshida and Takao Suzuki's research report ``A few findings on the dyeing of safflower'') However, this dyeing method using red pigment only uses a small amount of red pigment. This is also the reason why products are expensive.

However, the yellow dye used in the present invention had not been studied in the past for dyeing fibers, and had been thrown away without any consideration.

Problems to be Solved by the Invention The present invention aims to utilize the red pigment in the same manner as before, and further utilize the yellow pigment which was discarded as a water-soluble substance during the production of the red pigment.

Yellow pigment, which is a precursor to red pigment, is dyed into a dyeable material in advance, and the color is developed with hydrogen peroxide to produce red pigment.

Yellow dye is unstable, has never been used as a dye, and it was not known whether it would dye fibers. It was not known whether oxidation would cause color to develop on the fibers and whether they would be dyed.

■Construction of the Invention Means for Solving the Problems In the present invention, it has been found that oxidation, especially in air oxidation, produces little color, and the inventor has found that only under specific conditions of hydrogen peroxide, complete color development and dyeing occur in a short period of time. It was.

Functions and Effects The present invention dyes with a safflower pigment containing a yellow pigment and oxidizes it with hydrogen peroxide, so that dyeing and color development can be achieved in a very short time, and the color can be developed with a small amount of safflower used. When rubbed and colored, the sunlight fastness remains at grade 3, making it suitable for practical use.

Example 1゜ Glue a piece of cloth (cotton) on top of a template with a pattern carved into it. On top of this, add yellow buds and the petals of yellow safflowers at the beginning of flowering (the red pigment has not yet formed). Place the flower with the leaves still attached and rub it in. No matter how long you leave it like this, it will remain yellow and will not turn red.

At this time, soak in 40℃ warm water and hydrogen peroxide solution (nod%)
When dropped or sprayed in a very small amount, it turns red in 3 to 1 minutes.

After washing with water and drying, the result was similar to that of safflower dyeing using red dye.

Example 2: Even when a paper pattern with a pattern engraved on it was placed on a fabric, rubbed in the same way as in Example 1, and treated in the same way, the results were the same.

Example 3 To manufacture safflower mochi, first pick the flowers that have started to turn red on the 3rd to 3rd day after blooming, moisten them, and then knead them with your hands and feet or use a mochi rolling machine. Or put it in a blender to twist the petals so that they turn red easily. At this time, water-soluble yellow pigment is eluted.

Up until now, it had just been thrown away, but researchers noticed that this liquid contains a concentrated precursor to red pigment.

Even if cloth is soaked in this solution and oxidized in the air, it takes 2 to 3 hours at a water temperature of (100°C), and the yellow pigment cannot be completely converted to red pigment. It is not easy to operate.

At this time, if the yellow dye eluate is heated to 40°C and a cloth is soaked and a small amount of hydrogen peroxide is added, the color will immediately turn red, and there will be no uneven dyeing, and the yellow color will not be dyed unevenly. It can be dyed effectively.

In addition, after dyeing with yellow dye, treatment with metal salts may be carried out before or after hydrogen peroxide treatment. In that case, complex salts of metals such as iron, cobalt, ore are formed on the cloth, and purple, vermilion, gold Different colors can be produced depending on the metal, such as brown.

Claims (1)

[Claims] 1. Safflower (Carthamus tinctorius)
L. A red dyeing method using a safflower yellow pigment, which is characterized by dyeing a textile product with a yellow pigment from safflower (Asteraceae) and developing the dyed textile product with hydrogen peroxide. 2. The dyeing method according to claim 1, wherein the textile product is a natural fiber or a regenerated fiber thereof. 3. Safflower petals and husks that contain yellow pigment in textile products
The dyeing method described in the patent scope item 1 or 2, in which the dyeing method is directly rubbed. 4. The method according to claim 1, in which a textile product, which is a dyeable product, is immersed in an aqueous yellow dye solution that was previously discarded when producing a red dye from safflower.