What is the primary risk associated with over wetting natural fibers?

The primary risk associated with over wetting natural fibers is shrinkage. Natural fibers, such as cotton, wool, and silk, have unique properties that make them susceptible to changes in moisture content. When these fibers are over-saturated with water, they can absorb more moisture than they can accommodate, leading to a structural change in the fibers.

This absorption causes the fibers to swell and subsequently contract when they dry. This process can result in noticeable shrinkage of the fabric, which alters its fit and appearance. It is particularly important during cleaning processes; if improper techniques or an excessive amount of moisture is applied, the fabric may not only shrink but also lose its texture and overall integrity.

While mildew growth, color bleeding, and fraying are legitimate concerns when cleaning fabrics, they are generally secondary risks compared to the immediate, pronounced impact of shrinkage, especially for fabrics explicitly composed of natural fibers. This is why understanding the handling and limitations of different fabric types is crucial for upholstery and fabric cleaning technicians.