An image forming apparatus prints an image on paper. A developing roller supplies toner to an electrostatic latent image on a photoconductive drum to form a toner image. A developing blade forms a thin layer of toner on the developing roller. A transfer unit transfers the toner image onto the paper. A fixing unit fixes the toner image on the paper into a permanent image. The developing roller rotates at a circumferential speed from 150 to 250 mm/sec. The developing blade applies a line pressure in the range of 34-68 gf/cm to the developing roller. The toner has a glass transition temperature Tg from 45 to 77.quadrature., a softening temperature from 58 to 98.quadrature., a flow-beginning temperature Ts from 78 to 138.quadrature., and a melting point Tm from 105 to 189.quadrature.. Tg, Ts, Tfb and Tm are related such that Tm>Tfb>Ts.