Image forming apparatus, toner, and process cartridge

An image forming apparatus, comprising:

• an image bearing member configured to bear a latent image;
• a charging device configured to charge a surface of the image bearing member;
• an irradiating device configured to write an electrostatic latent image on the charged surface of the image bearing member;
• a developing device configured to develop the electrostatic latent image formed on the surface of the image bearing member with a developer comprising a toner;
• a transfer device configured to transfer the toner image onto at least one of a transfer member and a recording medium;
• a cleaning device configured to remove residual toner particles remaining on the surface of the image bearing member;
• and
• a fixing device configured to fix the toner image on the recording medium, comprising:
• a heat roller;
• and
• an oil applicator configured to apply a silicone oil to the heat roller,
• wherein the image forming apparatus has a system speed of from 500 to 1700 mm/sec, and
• wherein said developing device comprises a developer comprising a toner comprising mother toner particles comprising:
• a binder resin comprising a crystalline polyester resin and an amorphous polyester resin;
• a fatty acid amide compound;
• and
• a colorant,
• wherein a ratio (W/R) of a height (W) of a peak at a wavenumber of 1638 cm−1, specific to the fatty acid amide compound, to a height (R) of a peak at a wavenumber of 829 cm−1, specific to the amorphous polyester resin, is from 0.010 to 0.040 in an absorption spectrum obtained by an ATR method (total reflectance method) using a Fourier transform infrared (FT-IR) spectrophotometer.