Although once extracted from plants, indigo dye is now almost exclusively synthesized industrially. [1] A dye is a colored substance that chemically bonds to the material to which it is being applied. This distinguishes dyes from pigments which do not chemically bind to the material they color.

dye, substance used to impart colour to textiles, paper, leather, and other materials such that the colouring is not readily altered by washing, heat, light, or other factors to which the material is likely to be exposed.

2023年8月7日 · Dyes are the pigmentation agents that imbue the articles of our daily lives with vibrant hues. Dyes are ubiquitously employed, spanning from plastic playthings for juveniles to the textiles adorning your personage, from comestibles to timber; scarcely any sector exists wherein dyes are not commercially utilized.

Prominent types are 1) acid dyes for polyamide and protein substrates such as nylon, wool, and silk; 2) disperse dyes for hydrophobic substrates such as polyester and acetate, and 3) direct and reactive dyes for cellulosic substrates such as cotton, rayon, linen, and paper.

Natural dyes are dyes or colorants derived from plants, invertebrates, or minerals. The majority of natural dyes are vegetable dyes from plant sources— roots, berries, bark, leaves, and wood —and other biological sources such as fungi. [1] Archaeologists have found evidence of textile dyeing dating back to the Neolithic period.

Dyeing is the application of dyes or pigments on textile materials such as fibers, yarns, and fabrics with the goal of achieving color with desired color fastness. Dyeing is normally done in a special solution containing dyes and particular chemical material.

2022年9月1日 · Most dyes are organic compounds i.e they contain carbon. There are some substances that are themselves not colored but they brighten the color imparted by another dye, or they whiten a white substrate. These optical brighteners or whiteners are termed white dyes.