Which property is particularly hazardous for protein fibers such as wool when using chlorine bleach?

Discoloration is particularly hazardous for protein fibers, such as wool, when using chlorine bleach due to the chemical nature of the fibers and the reaction they have with bleach. Chlorine bleach can lead to significant color loss in these fibers, resulting in irreversible discoloration that can affect the aesthetic quality and value of the material.

Protein fibers, which are derived from animal sources, are more sensitive to harsh chemicals compared to synthetic fibers. When chlorine bleach is used, it reacts with the protein structure of the wool, breaking down the dye molecules and leading to a bleached or faded appearance. This is a critical factor in restoration and cleaning processes, as maintaining the original color of sensitive materials is often essential.

While other properties, such as stiffening, strength reduction, and odor retention, may also be concerns when using bleach on protein fibers, the immediate and most visible impact is typically discoloration. Maintaining the integrity and appearance of these fibers is crucial in the restoration field, making understanding the effects of cleaning agents like chlorine bleach on protein fibers an important consideration for professionals.