Toner, two-component developer, developing device, fixing device, and image forming apparatus

A fixing device where an unfixed toner image formed of a toner on a transfer material is irradiated with light from a light source, so that the toner is fused by light energy to be fixed on the transfer material, wherein:

• the light source comprises only laser light sources provided for respective colors of toners to be used;
• each of the laser light sources emits laser light having a wavelength in an absorption wavelength range of any particular color of the colors;
• and
• the toner has a two-layer structure where a coating layer is formed around a surface of a core particle serving as a toner matrix particle, and nb/na is in a range of 0.92 to 0.96 where nb/na is a ratio of a refractive index of a resin making up the coating layer (nb) to a refractive index of a resin making up the core particle (na).

An image forming apparatus comprising:

• (i) a developing device performing development using a developer that contains a toner wherein:
• the toner has a two-layer structure where a coating layer is formed around a surface of a core particle serving as a toner matrix particle;
• and nb/na is in a range of 0.92 to 0.96 where nb/na is a ratio of a refractive index of a resin making up the coating layer (nb) to a refractive index of a resin making up the core particle (na);
• and
• (ii) a fixing device where an unfixed toner image formed of the toner on a transfer material is irradiated with light from a light source, so that the toner is fused by light energy to be fixed on the transfer material, wherein the light source comprises only laser light sources provided for respective colors of toners to be used, and each of the laser light sources emits laser light having a wavelength in an absorption wavelength range of any particular color of the colors.