Toner for developing electrostatic latent image and production method thereof

A method of producing a toner for developing an electrostatic latent image, the method comprising:

• dissolving a compound that reacts with a binder resin precursor through an elongation reaction or a cross-linking reaction in an oil phase, where the oil phase is prepared by dissolving the binder resin precursor, a release agent, and a colorant in an organic solvent;
• dispersing the oil phase in an aqueous medium in which resin particles are dispersed to form an emulsified dispersion liquid;
• allowing the binder resin precursor to react through an elongation reaction or a cross-linking reaction in the emulsified dispersion liquid to yield a reaction product;
• removing the organic solvent;
• and
• adding particles of a fluorosurfactant to the reaction product to produce a toner,
• wherein the toner includes:
• toner particles, each toner particle including:
• a binder resin derived from the binder resin precursor;
• the release agent;
• the colorant;
• and
• the particles of the fluorosurfactant,
• wherein the particles of the fluorosurfactant are metal particles, or halogen particles, or a combination of the metal particles and the halogen particles,
• where a metal constituting the metal particles may have a monovalent or higher ionic valence,
• wherein an abundance X of the particles of the fluorosurfactant is within a range represented by 3 μm2≤X μm2≤10 μm2, where X μm2 is the abundance X that is an area of the particles of the fluorosurfactant present in a surface portion of each of the toner particles measured by a scanning electron microscope-energy dispersive X-ray spectrometer (SEM-EDX) with setting a magnification to 40,000×, field of view to 100 μm2, and acceleration voltage to 1 kV, and
• wherein a declining rate of the particles of the fluorosurfactant represented by Formula (1) is from 80% through 100%,
• Declining rate of particles of the fluorosurfactant (%)=(X−Y)/X×100 Formula (1)
• where Y μm2 is an abundance Y of the particles of the fluorosurfactant that is an area of the particles of the fluorosurfactant present in a surface portion of each of the toner particles as measured by the SEM-EDX with setting a magnification to 40,000×, field of view to 100 μm2, and acceleration voltage to 3 kV;
• and
• wherein the binder resin contains a crystalline polyester resin.