Patent ID: 7177555

Claim:
An image forming apparatus comprising: a photoconductor; a latent electrostatic image forming unit for forming a latent electrostatic image on the photoconductor; a developer amount detection unit for detecting developer amount adhering to the photoconductor surface by a reflecting photosensor; a developing unit for developing the latent electrostatic image using a developer comprising a toner to form a visible image, and configured to have a developer stirring time per copy when one copy is made from an original which is 2 to 6 times the developer stirring time per copy when two or more copies are made from the original; a transfer unit for transferring the visible image to a recording medium; and a cleaning unit for removing the developer on the photoconductor surface, wherein the toner comprises a binder resin and a wax, the dynamic frictional coefficient of the toner is 0.15 to 0.45, and the wax peak intensity ratio expressed by the following Equation 1 on the toner surface is 0.12 to 0.4, Wax peak intensity ratio= W/R <Equation 1> wherein, “W” expresses the peak height of the characteristic spectrum of the wax calculated by the ATR method using FT-IR, and “R” is the peak height of the characteristic spectrum of the resin calculated by the ATR method using FT-IR.