CROSS-REFERENCE TO RELATED APPLICATIONS

This patent application is based on and claims priority pursuant to 35 U.S.C. § 119(a) to Japanese Patent Application No. 2019-091192, filed on May 14, 2019, in the Japan Patent Office, the entire disclosure of which is hereby incorporated by reference herein.

BACKGROUND

Technical Field

The present disclosure relates to a toner, a toner stored container, a developer, a developing device, a process cartridge, and an image forming apparatus.

Description of the Related Art

An electrophotographic image forming method includes: a charging step of giving, through electric discharge, electric charges onto the surface of a photoconductor that is a latent image bearer; an exposing step of exposing the charged surface of the photoconductor to form an electrostatic latent image; a developing step of supplying a toner to develop the electrostatic latent image formed on the surface of the photoconductor; a transfer step of transferring a toner image from the surface of the photoconductor onto a recording medium; and a fixing step of fixing the toner image on the recording medium.

SUMMARY

According to one aspect of the present disclosure, a toner includes a strontium titanate powdery material as an external additive. The strontium titanate powdery material includes Si-containing particles on a surface of the strontium titanate powdery material. The Si-containing particles have a number average circle equivalent diameter of 5 nm or more but 15 nm or less.

