With the outbreak of the global epidemic, people's awareness of protection has become stronger and stronger. For the two predicting the flu and the upcoming C19 virus, we are not too fond of shaking hands with bare hands, nor of touching doors, stair railings and other public surfaces. For poor immu

The surface of human skin is covered with residue including oils, dirt, salts, and moisture. These can damage museum objects by etching, abrasion, and staining. Likewise, the surface of objects can be composed of, or treated with, materials of varying toxicity, such as pesticides.