| abstract |
A toner for developing an electrostatic image, which is excellent in fluidity and transportability, has high image density, has high dot reproducibility, and is safe for a human body, and a method for evaluating the toner. Provided are a developing method to be used, a toner cartridge filled with the toner, a method for producing the toner, and an evaluation device. An additive is adhered or fixed to the surface of a base toner powder composed of a pigment and a resin using at least a metal oxide, and after the powder is previously compacted, the penetration speed is increased while rotating a conical rotor. The value of the torque generated when penetrating the 20 mm powder phase at 5 mm / min is 0.1 to 1.9 mNm, or the value of the load generated when penetrating the 20 mm powder phase is 0.01. A toner for developing an electrostatic image, wherein [Selection diagram] Fig. 1 |