Basic dyes are a type of synthetic dye that are cationic, meaning they carry a positive charge. They are commonly used to color materials like textiles, paper, and leather. Basic dyes are known for their bright colors and good solubility in water, making them easy to apply. However, they can have lower wash fastness compared to other dye types, which means they may fade more quickly when washed. These dyes work by binding to negatively charged sites on the fibers, allowing for effective coloring. Basic dyes are often used on acrylic fibers and some types of wool, but they are less effective on cotton and other natural fibers. Their vibrant hues make them popular in various applications, including art and craft projects.