Patent ID: 9625841
Date: 2017-04-18
CPC Classifications: G03G

Claim:
1. A toner comprising toner particles containing a binder resin comprising styrene resin, and release agent comprising at least one fatty acid ester compound having a melting point of 60° C. to 90° C. selected from the group consisting of a tetrafunctional fatty acid ester compound, a pentafunctional fatty acid ester compound and a hexafunctional fatty acid ester compound; and inorganic fine particles present on the surface of the toner particles, the inorganic fine particles comprising metal oxide fine particles, said metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica, titania and alumina fine particles, wherein when a coverage ratio A (%) is a coverage ratio of the toner particles' surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the toner particles' surface by the inorganic fine particles that are fixed on the toner particles' surface, the toner has a coverage ratio A of 45.0% to 70.0% and a coefficient of variation on the coverage ratio A of not more than 10.0%, B/A is 0.50 to 0.85, and a peak molecular weight (Mp) of a main peak is from 4000 to 8000 in a measurement using gel permeation chromatography of a tetrahydrofuran-soluble matter in the toner.