| abstract |
(57) [Problem] To provide a toner capable of obtaining a high-quality image without causing "retransfer" under a wide range of transfer current conditions. SOLUTION: Fine particles of a compound having a plate shape are externally added to toner base particles, and have one or more endothermic peaks in differential thermal analysis at 120 ° C. or lower, and the shape of toner particles measured by an image analyzer. When the value of the coefficient SF1 is 110 <S F1 ≦ 180, and the value of the shape factor SF2 is 110 <S F2 ≦ 140, and the ratio B / A of a value B obtained by subtracting 100 from the value of SF2 and a value A obtained by subtracting 100 from the value of SF1 is 1.0 or less. |