Replenishment container for two-component developer and filling method

摘要

A developer container (7) that contains a two-component developer (8) including a carrier and toner includes a developer containing portion (71) configured to include a plurality of surfaces and to accommodate the two-component developer (8) and a cap (72) configured to communicate to a suction pump (4) so that the two-component developer (8) is sucked by the suction pump (4) and is conveyed to a developing unit (10), and the developer containing portion (71) is configured to include an internal space having at least 12% of an air space measured after the two-component developer (8) is packed in the developer containing portion (71) and left still for at least 24 hours.