Abstract: Provided are indigo darkener, containing: in parts by weight, 0.1-99 of indigo dye, 0-99 of alkaline dyeing assistant, 0.01-99 of acidic dyeing assistant, and 0-99 of oxidizing agent, and hair dyeing process using the indigo darkener. The multi-layer scales on the surface of hair are opened at large angles under alkaline condition and/or high-temperature condition, so that large indigo dyeing particles are easily absorbed in the scales; black indigo oxocarbon or carbon black is generated under the action of alkaline dyeing assistant and oxidizing agent at high temperature by the property that the indigo dye is easy to oxidize; the acidic dye assistant is added as the temperature decreases, and the scales having opening angles on the surface of hair are closed under acidic condition, so that the indigo carbide is firmly clamped and fixed in the scales of hair; finally, the blue indigo dyes white hair into black.

Abstract: Provided are indigo darkener, containing: in parts by weight, 0.1-99 of indigo dye, 0-99 of alkaline dyeing assistant, 0.01-99 of acidic dyeing assistant, and 0-99 of oxidizing agent, and hair dyeing process using the indigo darkener. The multi-layer scales on the surface of hair are opened at large angles under alkaline condition and/or high-temperature condition, so that large indigo dyeing particles are easily absorbed in the scales; black indigo oxocarbon or carbon black is generated under the action of alkaline dyeing assistant and oxidizing agent at high temperature by the property that the indigo dye is easy to oxidize; the acidic dye assistant is added as the temperature decreases, and the scales having opening angles on the surface of hair are closed under acidic condition, so that the indigo carbide is firmly clamped and fixed in the scales of hair; finally, the blue indigo dyes white hair into black.

Abstract: A hair darkening dye composition, comprises: 2-98 parts by weight of hair dye; 1-99 parts by weight of darkening agent; 2-98 parts by weight of crosslinking agent; 2-98 parts by weight of emulsifier; 2-98 parts by weight of dyeing auxiliaries; and 0.1-40 parts by weight of pH regulator. The darkening agent is selected from one or more of chitin, chitosan, gelatin, silicon oil and resin. The chitin, chitosan and gelatin have a relative molecular weight of less than 2.7×104, and the silicon oil and resin have a refractive index of less than 1.55.

Abstract: A hair darkening dye composition, comprises: 2-98 parts by weight of hair dye; 1-99 parts by weight of darkening agent; 2-98 parts by weight of crosslinking agent; 2-98 parts by weight of emulsifier; 2-98 parts by weight of dyeing auxiliaries; and 0.1-40 parts by weight of pH regulator. The darkening agent is selected from one or more of chitin, chitosan, gelatin, silicon oil and resin. The chitin, chitosan and gelatin have a relative molecular weight of less than 2.7×104, and the silicon oil and resin have a refractive index of less than 1.55.

Abstract: The present invention discloses a color-enhancing detergent for colored textile and a preparation method therefor. The color enhancing detergent for colored textile is composed of the following raw materials in parts by weight: a detergent, a deepening agent, a penetrating agent, a cationic modifier, a fiber modifier, a cellosolve, a diffusing agent, a dye fixing agent, a leveling agent, a dyeing auxiliary, a brightening agent, a bleaching agent, a pH-adjusting agent, and a bluing agent. The detergent can effectively fix the color of the colored textile that is washed and can deepen the original color as well.

Abstract: The present invention discloses a color-enhancing detergent for colored textile and a preparation method therefor. The color enhancing detergent for colored textile is composed of the following raw materials in parts by weight: a detergent, a deepening agent, a penetrating agent, a cationic modifier, a fiber modifier, a cellosolve, a diffusing agent, a dye fixing agent, a leveling agent, a dyeing auxiliary, a brightening agent, a bleaching agent, a pH-adjusting agent, and a bluing agent. The detergent can effectively fix the color of the colored textile that is washed and can deepen the original color as well.