Patent ID: 8367289
Filing Date: 2013-02-05
Classification: G03G

Abstract:
1. A toner comprising toner particles containing at least a binder resin and a colorant, and fatty acid metal salt particles, wherein the fatty acid metal salt particles have a volume-based median diameter (D50s) of 0.15 μm or more and 0.65 μm or less, a liberation ratio of the fatty acid metal salt particles in the toner is 1.0% or more and 25.0% or less, a content of the fatty acid metal salt particles is 0.02 part by mass or more and 0.50 part by mass or less with respect to 100 parts by mass of the toner particles, a Span value B of the fatty acid metal salt particles is 1.75 or less, where the Span value B is defined by the following equation (1): where D5s is the 5% accumulated diameter on a volume basis of the fatty acid metal salt, particles and D95s is the 95% accumulated diameter on a volume basis of the fatty acid metal salt particles, the toner has a ratio (Span value A/Span value B) of 0.25 or more and 0.75 or less where the Span value A is defined by the following equation (2): where D5t is the 5% accumulated diameter on a number basis of the toner, D50t is the 50% accumulated diameter on a number basis of the toner, and D95t is the 95% accumulated diameter on a number basis of the toner, and the fatty acid metal salt particles comprise a metal stearate.