Cellulosic browning occurs in carpets with what type of backing structure?

Cellulosic browning typically occurs in carpets made from natural fibers. This phenomenon is caused by the presence of cellulose, which is a key component of natural fibers such as cotton and jute. When these fibers are exposed to moisture, especially during cleaning processes, they can become susceptible to browning due to the breakdown of cellulose. This browning represents a chemical reaction, often exacerbated by high humidity or improper drying techniques.

Carpets with synthetic fibers, on the other hand, do not contain cellulose and are therefore not prone to this specific type of browning. Similarly, blended fibers, which may contain both synthetic and natural materials, can still have the synthetic component that helps mitigate the risk of cellulosic browning, especially if the blend contains a significant proportion of synthetic material. Thus, the presence of natural fibers in the backing structure is the primary reason for the occurrence of cellulosic browning.