Full-color toner kit, process cartridge, and image forming method

An image forming method, comprising:

• forming a latent image on an image bearing member;
• providing a full-color toner kit including,
• a yellow toner including a benzimidazolone colorant, resins (A) and (B) each of which including a polyester skeleton and a wax, and a resin (C) including a polyester skeleton and no wax,
• a magenta toner including a naphthol colorant and the resins (A), (B), and (C), and
• a cyan toner including a copper phthalocyanine colorant, the resins (A), (B), and (C), wherein each of the yellow, magenta, and cyan toners has a softening point of from 125° C. to 135° C.,
• wherein the following relationships are satisfied:
• Ts(A)<Ts(B)
• Ay+5≦Am≦Ay+15
• Ac+5≦Am≦Ac+15
• wherein Ts(A) and Ts(B) (° C.) each represent softening points of the resin (A) and (B), respectively;
• and Ay, Am, and Ac each represent ratios (% by weight) of an amount of the resin (A) to total amount of the resins (A) and (B) in the yellow, magenta, cyan toners, respectively;
• supplying a toner contained in the full-color toner kit to a toner bearing member;
• and
• forming a thin layer of the toner on the toner bearing member to develop the latent image with the toner.