Dye is a substance used to add color to materials such as fabric, paper, and food. It can be derived from natural sources, like plants and insects, or created synthetically in laboratories. Dyes work by chemically bonding to the material, allowing for vibrant and lasting colors. There are various types of dyes, including reactive dyes, acid dyes, and disperse dyes, each suited for different applications. The dyeing process can involve techniques like immersion, spraying, or printing, depending on the desired effect. Proper use of dye can enhance the aesthetic appeal of products and is essential in industries like fashion and textiles.