Yellowing, also known as "yellowing", refers to the phenomenon that the surface of a white or light-colored substance turns yellow under the action of external conditions such as light, heat, and chemicals. Yellowing of white and dyed textiles not only damages their appearance, but also greatly reduces their service life. Therefore, the research on the causes of yellowing of textiles and the measures to prevent yellowing has always been one of the hot topics at home and abroad.

White or light-colored fabrics of nylon fabrics, elastic fibers and their blended fabrics are particularly prone to yellowing. Yellowing may occur during the dyeing and finishing process, or during storage or hanging in store windows, or even occur. at home. There are many reasons that may cause yellowing, such as the fiber itself is prone to yellowing (material-related), or chemicals used on fabrics, such as oil residues and softeners (chemical-related).

Often further analysis is necessary to know the cause of yellowing, how to set processing conditions, which chemicals should or only be used, and which factors interact to cause yellowing, fabric packaging and How about storage etc.

We mainly focus on the high heat yellowing and storage yellowing of nylon cloth, polyester fiber and elastic fiber blended fabrics, such as Lycra, Dorlastan, Spandex, etc.