Electrophotographic toner, an electrophotographic developer, a toner cartridge, process cartridge and image forming apparatus

PROBLEM TO BE SOLVED: To provide an electrophotographic toner capable of giving an image with easy deinking property while maintaining low-temperature fixability, and to provide an electrophotographic developer containing the electrophotographic toner, a toner cartridge accommodating the electrophotographic toner, and a process cartridge and an image forming apparatus, using the electrophotographic developer. SOLUTION: The electrophotographic toner contains a crystalline polyester resin, an amorphous polyester resin, a colorant and a release agent, wherein a relaxation modulus G1(t=1) after one second obtained by stress relaxation measurement at 60°C is 2×10 6 to 1×10 7 Pa and a relaxation modulus G2(t=50) after 50 seconds is 7×10 4 to 5 Pa. Provided are also: the electrophotographic developer containing the electrophotographic toner; the toner cartridge accommodating the electrophotographic toner; and the process cartridge and the image forming apparatus, using the electrophotographic developer. COPYRIGHT: (C)2010,JPO&INPIT