Dyeing method

[0023] Example one:

[0024] Use 5 g/L of vat dye Vat Red 6B to dye the base color of the cellulose fabric, and then use 15 g/L of sulfur dye Sulfur Blue 3B. The soaping fastness of dyed vat dyes is higher than that of dyed sulfur dyes, so the red background color is not easy to be washed off during washing, and the blue surface color is easily washed off. The dyeing process conditions are all the prior art, which will not be repeated here. After dyeing, the surface of the cellulose fabric is blue-purple, and finally the whole cellulose fabric is washed with water, that is, an enzyme solution with a mass percentage of 1% is selected to wash the cellulose fabric with water at room temperature. The cloth surface after washing shows red-purple-blue-purple and a color between the three colors. During the enzyme washing process, different parts of the cellulose fabric rub against each other. Due to the poorer soaping fastness of sulfur dyes than the vat dyes, the parts of the cellulose fabric that are subjected to greater friction during the washing process will be rubbed. The more sulfur dyes are removed, the more severe the fading is. In the place where the friction is greatest, the sulfur dyes are all rubbed and washed away, revealing the background color. In the parts with less friction, the sulfur dye is partially washed away, and the color fades less, showing a color between the background color (the color of the vat dye) and the surface color (the color of the sulfur dye). The sulfur dyes are hardly washed off at the parts that are hardly affected by friction, and naturally show the color of the sulfur dyes. Therefore, the surface of the cellulose fabric shows different colors according to the magnitude of the friction force, which overcomes the defect that the background color is single white in the prior art, thereby making the cellulose fabric obtained by the method have various colors and an old fashion appearance.

[0025] Embodiment two:

[0026] First dye the base color of the cellulose non-woven fabric with 5 g/L vat dye Vat Blue RSM, and then dye the surface color of the cellulose non-woven fabric with 20 g/L sulfur dye Sulfur Red. The soaping fastness of dyes is higher than that of dyed sulfur dyes, so the blue background color is not easy to be washed off during washing, and the red surface color is easy to wash off. The dyeing process conditions are all the prior art, which will not be repeated here. Finally, part of the cellulose non-woven fabric is stone washed. The stone washing refers to adding a certain size of pumice stone to the water used for washing the cellulose non-woven fabric to polish the pumice stone and the cellulose non-woven fabric to polish the water level in the tank. It is carried out at a low water level at which the cellulose non-woven fabric is completely soaked, so that the pumice stone can be well in contact with the cellulose non-woven fabric, so that the surface of the cellulose non-woven fabric appears gray and old after washing feel. The surface of the stone-washed part of the cellulose non-woven fabric presents blue-purple-purple blue and a color between the three, and the other parts that have not been stone-washed are blue. The stone-washed part and the The parts that have not been stonewashed form patterns or patterns as a whole. The principle that the stone washing makes the surface of the cellulose non-woven fabric show multiple colors is the same as the principle of the enzyme water washing friction fading in the first embodiment, which is not repeated here.

[0027] Embodiment three:

[0028] First dye the cellulose yarn with 5 g/L vat dye Vat Blue RSM for the base color, then use 18 g/L sulfur dye Sulfur Yellow Brown 5G to dye the cellulose yarn with the intermediate color, and finally use paint Red 8119 dyes the cellulose yarn. The soaping fastness of the dyed vat dye is higher than that of the dyed sulfur dye, and the soaping fastness of the sulfur dye is higher than that of the coating. Therefore, the blue background color is the least likely to be washed off during washing, and the red surface color is the easiest to be washed off. The dyeing process conditions are all the prior art, which will not be repeated here. For the dyed cellulose yarn enzyme stone washing, the mass percentage of the enzyme in the enzyme solution is 0.5%, and the cloth surface after washing shows: blue-yellow-red and a color between the three . Due to the addition of a layer of intermediate color, the color of the cellulose yarn after enzyme stone washing is richer. The enzyme stone washing refers to adding a certain amount of enzymes and pumice stone to the water for washing the cellulose yarn, which comprehensively utilizes the advantages of the water washing in the first and second embodiments, and can effectively shorten the washing time. The principle of the enzyme stone washing to make the surface of the cellulose yarn show a variety of colors is the same as the principle of the enzyme washing, friction and fading in the first embodiment.

[0029] According to the method of dyeing one layer of intermediate colors in this embodiment, those skilled in the art will naturally think of a method of dyeing multiple layers of intermediate colors, as long as the soaping fastness of the intermediate color is lower than that of the base color. Between the fastness and the soaping fastness of the intermediate color, and the soaping fastness of the intermediate color close to the background color is higher than the soaping fastness of the intermediate color close to the surface color, so The color of the intermediate color is different from the color of the base color and the color of the surface color, and the colors of the intermediate color are different from each other, so that the object of the present invention can be achieved.