| 摘要 |
PROBLEM TO BE SOLVED: To provide toner which exhibits stable cleaning performance even after repeated use in low-temperature/low-humidity and high-temperature/high-humidity environments, and forms an image having improved photoreceptor filming (contamination) resistance and environment resistance, two-component developer using the toner, a process cartridge, an image forming device, and an image forming method.SOLUTION: Toner includes toner base particles having colorant and resin, and one or more kinds of oxide fine particles, and has a weight average particle diameter Dof 2-7 μm and circularity of 0.95-1.00. The oxide fine particles contain at least a silicon element and have a number average particle diameter Dn of 30-150 nm when sticking to the toner base particles. A standard deviation ratio DL (%) of a number average particle diameter in a particle size distribution is 0≤DL≤20 (DL=&sgr;/Dn×100, &sgr; is standard deviation). A shape factor SF1 is 131-180. A shape factor SF2 is 126-180. A standard deviation ratio SF1L (%) of SF1 is 0≤SF1L≤20 (SF1L=&sgr;/SF1×100, &sgr; is standard deviation). A standard deviation ratio SF2L (%) of SF2 is 0≤SF2L≤20 (SF2L=&sgr;/SF2×100, &sgr; is standard deviation). |
