DEVELOPING CARTRIDGE HAVING A PLURALITY OF DEVELOPER WITH DIFFERENT MATERIAL PROPERTY AND IMAGE FORMING APPARATUS HAVING THE SAME

摘要

A developing cartridge having a plurality of developers each with different properties and an image forming apparatus having the same are provided to store a plurality of developers each having a different glass transition temperature and first supply a developer with a relatively high glass transition temperature to a developer transfer member to thus prevent degradation of print quality caused by streaks and migrations. An image carrier(142) coats a developer to recording paper. A developer storage unit(147) stores a plurality of developers each of which has different physical properties and is supplied in the different order according to the physical properties. A developer transfer member sequentially transfers each developer to the image carrier according to the supply order. The physical properties are a glass transition temperature, and a developer having a relatively higher glass transition temperature is first transferred to the image carrier. A glass transition temperature of the developer supplied with a higher priority and that of a developer supplied with a lower priority is more than 3°C. The plurality of developers have mutually different inside additives and the same outside additive.