Toner for developing electrostatic images and image forming method

An image forming method, comprising:

• forming an electrostatic image on an electrostatic image-bearing member,
• developing the electrostatic image with a toner to form a toner image on the electrostatic image-bearing member,
• transferring the toner image from the electrostatic image-bearing member to a transfer-receiving material directly or via an intermediate transfer member, and
• fixing the toner image onto the transfer-receiving material under application of heat and pressure,
• wherein said toner comprises at least a binder resin, a colorant and an ester wax;
• wherein
• said ester wax is contained in 3-40 wt. parts per 100 wt. parts of the binder resin,
• said ester wax comprises ester compounds represented by a formula of
• R.sub.1 --COO--R.sub.2,
• wherein R.sub.1 and R.sub.2 independently denote a hydrocarbon group of 15-45 carbon atoms, and
• said ester wax contains 50-95 wt. % thereof of ester compounds having an identical number of total carbon atoms.