Why is the color of colored cotton products less bright than that of dyed clothing

The color of colored cotton clothing is not so bright, because there is a layer of wax on the surface of cotton fiber. In the process of printing, dyeing and finishing, ordinary white cotton uses various chemicals to eliminate wax. In addition, the dye has bright color and large visual contrast, so it is bright. Colored cotton is not treated with chemicals in the processing process, and still retains the characteristics of natural fibers. Therefore, it produces a hazy visual effect, and the fresh brightness is less than that of clothes made of printed and dyed fabrics.