Common issues in textile colorfastness:

1. Poor lightfastness. During wear, the outer garment’s color may lighten or change in areas exposed to prolonged sunlight—typically the back and shoulders—while areas receiving little or no direct sunlight remain unchanged or exhibit only slight color variation. This results in uneven coloration across a product that was originally uniform, rendering it unsuitable for further use.

2. Poor fastness to washing, soap washing, and dry cleaning. High-end silk, wool, and pure cotton garments are particularly prone to these issues.

3. Colorfastness to rubbing is unsatisfactory. During use, different parts of a textile product experience varying degrees of friction, resulting in uneven color loss. For example, the elbows, collar, and underarms of tops are prone to fading. Additionally, the seat and knees of trousers are also susceptible to color transfer.

4. Colorfastness to sweat is unsatisfactory. This issue typically occurs with summer garments or close-fitting undergarments, which fade when exposed to perspiration during wear.