Reactive dyeing is a method used to color fabrics, particularly those made from cotton and other cellulosic fibers. This technique involves using reactive dyes that form a chemical bond with the fiber, resulting in vibrant and long-lasting colors. The process typically requires the use of water, heat, and an alkaline environment to facilitate the dye's reaction with the fabric. During reactive dyeing, the dye molecules attach to the fiber at a molecular level, making the color resistant to washing and fading. This method is popular in the textile industry due to its ability to produce a wide range of shades and its compatibility with various dyeing techniques, such as batch dyeing and continuous dyeing.