What characteristic of cellulosic fibers makes them more susceptible to mildew?

Cellulosic fibers, such as cotton and rayon, are inherently made from plant materials and have a chemical structure that contributes to their high absorbency. This characteristic means that these fibers can easily retain moisture. Mildew thrives in damp, humid conditions, and the ability of cellulosic fibers to absorb and hold water creates an environment that is conducive for mildew growth.

When moisture is present in sufficient amounts, and if the fibers are inadequately dried or are exposed to warm temperatures, the risk of mildew formation significantly increases. This susceptibility is crucial for carpet cleaning technicians to understand, as proper cleaning and drying techniques must be employed to prevent mildew damage and ensure the longevity of cellulosic fiber carpets.

Other characteristics, such as strength and elasticity, do not directly relate to mildew susceptibility in the same way. Strength relates to how much force the material can withstand without breaking, and elasticity refers to how well a material can return to its original shape after being stretched or compressed. Meanwhile, low absorbency would make fibers less prone to mildew, as there would be less moisture retention in the material.