| abstract |
The present invention aims to provide a deformed toner having a narrow toner particle size distribution, a simple manufacturing method of same, and an imaging apparatus using same. The toner particles are characterized in having an average diameter of d (d is in a range of 4-15 mu m), and that a volumetric fraction of the particles having the diameter in a range of d+/-0.2 d equals to or exceeds 90% of total volume of the particles, and further, when a specific surface area of the toner per 1 cm3 determined by a BET method is expressed by A (m2/g) and a specific gravity of the particle is expressed by D (g/cm3), A of the particles stands in a range expressed by an equation, 7/(Dxd)</=A</=10/(Dxd). An image having a preferable definition can be obtained by improving a resolution of image by making the particle size distribution of toner particles narrow, and providing the toner having an electrification charge at least 10 mu C/g with a narrow distribution. |