Reactive dyes are a type of dye that form a chemical bond with the fabric fibers, typically made from cotton or cellulosic materials. This bonding process results in vibrant colors that are resistant to washing and fading, making them popular in the textile industry. These dyes are often used in processes like tie-dyeing and screen printing, where their ability to bond with fibers ensures long-lasting color. Reactive dyes are available in various forms, including powder and liquid, and can be applied using different methods, such as batch dyeing or continuous dyeing.