METHOD FOR PROTECTING BASE

摘要

Disclosed is a novel method for preventing or reducing adhesion of contaminant to a base, while preventing or reducing color degradation or color change of the base over time. This method is characterized in that a water repellent agent or a water absorption-preventing agent and one or more positively charged substances selected from the group consisting of (1) cations, (2) positively charged conductive or dielectric bodies and (3) composite bodies of a conductive body and a dielectric or semiconductor body are arranged on the surface of the base or in the surface layer of the base.