Tearable sealing member, developing apparatus and process cartridge.

摘要

A tearable sealing member for unsealably sealing an opening of a developer container for containing a developer for an image forming apparatus includes a seal film for closing the opening; a flexible tape extending along a surface of the seal film; wherein the seal film has an average density of not less than 0.65 g/cc and not more than 0.9 g/cc, measured under JIS K6758; wherein the seal film is torn and the opening is opened by pulling the flexible tape.