DEVELOPING UNIT, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS

摘要

There is provided a developing unit capable of suppressing to leave a memory on a developing roller (106) even when held under high-temperature and high-humidity conditions for a long period of time before the start of use. The developing unit has a developing roller (106) and a toner regulating member (109) in contact with each other with resin particles (120) therebetween. The resin particles (120) have a toluene absorbency of 20 g or more and 50 g or less per 40 g of the resin particles (120) and a Martens hardness of 1.0 N/mm 2 or more and 50.0 N/mm 2 or less.