For blended fibers, the colorfastness of each combination is judged according to the dyes used. When washing printed fabrics and solid-color fabrics, attention should be paid to the issues of color bleeding and color separation. Usually, not very bright colors stain bright colors, or light colors dye dark colors. If such phenomena occur, they must be dealt with immediately; otherwise, it may be difficult to restore the original appearance, so extra care should be taken during washing.