Electrostatic image developing toner, developer, and image forming apparatus

A developer comprising:

• an electrostatic image developing toner which comprises:
• toner particles each comprising a binder resin and a colorant;
• and
• an external additive carried on the toner particles,
• wherein the toner particles each have protrusions on a surface thereof,
• wherein an average of lengths of long sides of the protrusions is 0.10 μm or more but less than 0.50 μm standard deviation of the lengths of the long sides of the protrusions is 0.20 or less, and a coverage rate of the protrusions on the surface of each toner particle is 30% to 90%,
• wherein the external additive comprises at least two different fine particles comprising external additive (A) and one or more external additives (B), and
• wherein the external additive (A) has a longest average primary particle diameter among the external additives and is charged to have the opposite polarity to that of the toner particles, and at least one of the one or more external additives (B) is charged to have the same polarity as that of the toner particles.

An image forming apparatus comprising:

• a latent image bearing member which bears a latent image thereon,
• a charging unit configured to uniformly charge a surface of the latent image bearing member,
• an exposing unit configured to expose the charged surface of the latent image bearing member to light based on image data to form a latent electrostatic image,
• a toner with which the latent image is visualized,
• a developing unit configured to supply the toner to the latent electrostatic image formed on the surface of the latent image bearing member to develop the latent electrostatic image, to thereby form a visible image on the surface of the latent image bearing member,
• a transfer unit configured to transfer, onto an image-receiving medium, the visible image on the surface of the latent image bearing member, and
• a fixing unit configured to fix the visible image on the image-receiving medium,
• wherein the toner comprises:
• toner particles each comprising a binder resin and a colorant;
• and
• an external additive carried on the toner particles,
• wherein the toner particles each have protrusions on a surface thereof,
• wherein an average of lengths of long sides of the protrusions is 0.10 μm or more but less than 0.50 μm, a standard deviation of the lengths of the long sides of the protrusions is 0.20 or less, and a coverage rate of the protrusions on the surface of each toner particle is 30% to 90%,
• wherein the external additive comprises at least two different fine particles comprising external additive (A) and one or more external additives (B), and
• wherein the external additive (A) has a longest average primary particle diameter among the external additives and is charged to have the opposite polarity to that of the toner particles, and at least one of the one or more external additives (B) is charged to have the same polarity as that of the toner particles.