ELECTROPHOTOGRAPHIC DEVELOPMENT METHOD

摘要

PURPOSE:To prevent the reduction of the extent of triboelectric charge of a toner at high humidity by using polyester resin as the principal component of the toner and coating a triboelectric charge causing member with silicone resin contg. an aminosilane coupling agent. CONSTITUTION:A toner contg. polyester resin as the principal component and a triboelectric charge causing member coated with silicone resin contg. an aminosilane coupling agent are used. The triboelectric charge causing member is the core material of a carrier which causes triboelectric charge to the toner or a transfer regulating member such as a sleeve or a doctor blade. The polyester resin content in the toner is regulated to >=40wt.%. The extent of triboelectric charge of the toner is hardly reduced in an atmosphere at high humidity.