Plant dyes are the most widely used and most widely used dyes in natural dyes. A wide variety of plants can extract pigments that can be processed into plant-based natural dyes to color fibers and other materials. These plants are called "dye plants." The plants used for dyes are:
1, Su Mu
Sapphire is a red vegetable dye. Hematoxylin contains multiple hydroxyl groups, is easily soluble in water, and displays different shades of red at different pH levels. Hematoxylin and different mordants can be used to dye different colors (dark red, purple, red, red dates, etc.). It has been widely used as a dye since ancient times, and it is called "Suga color". Sapphire can dye natural wool and cotton. In particular, bright red can be seen on silk. Hematoxylin extracted from hematoxylin can be dyed black with chromium oxide as a mordant, which is called hematoxylin.
2. Scorpion
Belongs to the yellow line of vegetable dyes. In fact, it refers to the dried ripe fruit of wolfberry fruit. Silk fabrics can be directly dyed. The amount of dyes has the greatest influence on the dyeing results. The dyes have better lifting performance. When the mordant is suitable for the use of post-mortem dyeing, compared with direct dyeing, there is no significant change in the color of the fabric after dyeing. Except for the light fastness of not more than 3, the other fastness is basically above 4.
3, indigo
Blue plant dyes. Indigo leaves contain urinary blue mothers. Urine blue mothers are decomposed by saccharifying enzymes or alkaline agents in alkaline fermentation broths to liberate colorless indole phenols, which in turn oxidatively condense into blue lakes (indigo dyes) in the air. . Modern ethnic minorities such as Miao, Yao, Yi, Buyi still use indigo to process tie-dye and batik ethnic handicrafts.
4, purple grass
Lithospermum, also known as blood, riyal, red stone root, can be used as a purple plant dye. The pigment is mainly found in the roots, and the chemical components are mainly naphthoquinone derivatives such as lithospermum and acetyllithium.
5, chestnut peel
Chestnut shell is one of the natural dyes that have been recorded in ancient times and is a brown vegetable dye. Chestnut shells, bark, and leaves are used for dyeing. These parts contain a large amount of tannins, which produces a good dyeing effect.
Solar Traffic Light is a signal indicating product that converts solar energy into electrical energy. It is composed of solar cells, controllers, traffic signals, maintenance-free batteries, signal lights and other main components.
Compared with ordinary signal lights, solar traffic signal lights are more environmentally friendly and energy-saving. Because of their power storage function, there is no need to lay signal cables during installation, which can effectively avoid power outages caused by construction. Therefore, they are more and more widely used. application.
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