Leather dyeing method applying plant primary color dyestuff

Abstract

The invention discloses a leather dyeing method applying a plant primary color dyestuff. The leather dyeing method comprises the following main steps: preparing a dyeing solution, dyeing, softening, carrying out color fixation and carrying out wax sealing. In the step of preparing the dyeing solution, a blue dyeing solution, a yellow dyeing solution and a red dyeing solution are prepared; then one or more than one of the blue dyeing solution, the yellow dyeing solution and the red dyeing solution are mixed to prepare a dyeing solution with a needed color; in the step of dyeing, tree liquid which is squeezed from tung tree fruits is slowly boiled to prepare transparent boiled oil; raw lacquer extracted from lacquer trees is refined to prepare clear lacquer; the boiled oil and the clear lacquer are mixed and then a mixture is added into the dyeing solution to prepare the plant primary color dyestuff; then leather needing to be dyed is rotated in a rotary drum for certain time by utilizing a lanthanum nitrate-citric acid complex solution; then the leather which is subjected to rare-earth mordant dyeing is covered and colored by utilizing the plant primary color dyestuff; after being colored, the leather is rotated in the rotary drum for certain time to finish dyeing. The leather dyeing method disclosed by the invention is green and environmentally friendly, has high color fastness and does not easily fade.

Description

technical field [0001] The invention relates to the field of leather dyeing, in particular to a leather dyeing method using plant primary color dyes. Background technique [0002] Leather is widely used in industries such as shoemaking, leather clothing, leather goods, fur and its products. The leather on the market includes different types of genuine leather, recycled leather, artificial leather, and synthetic leather. It is a single color, and these single leathers processed into different products cannot meet people's visual requirements for colors. Therefore, in leather-related industries, the surface of the leather is treated by dyeing, and then processed into colorful leather products. After the leather is dyed, the color is rich and beautiful, which is more favored by consumers. [0003] The dyes used in leather dyeing are generally synthetic chemical dyes, most of which are dyes of aromatic amines. Most of the aromatic amines can cause cancer. The environmental poll...

AI Technical Summary

Problems solved by technology

[0004] Natural vegetable dyes are substances extracted from colored plant petals, fruits, stems, roots, leaves, etc., for example, red can be extracted from safflower petals, yellow can be extracted from gardenia fruits or vines Yellow is extracted from the sap, blue can be extracted from the stems and leaves of Polygonum indigo belonging to the Polygonaceae family, and orange-yellow can be extracted from the roots and stems of Curcuma belonging to the Zingiberaceae family, but the dyeing technique using vegetable materials has disadvantages The reason is that it can only be dyed with unique dyeing technology according to different dye materials. The dyeing method is different due to different raw materials, so it is very troublesome and inconvenient, and the vividness is easy to fall off and become thinner, and it will cause fading and decolorization due to frequent washing