Patent ID: 8241826

Claim:
A full-color image forming method comprising the step of: forming a full-color image employing at least a yellow toner, a magenta toner and a cyan toner, wherein lightness L* Y is in the range of 80-90 when a first toner image formed with only the yellow toner exhibits a maximum chroma; lightness L* M is in the range of 35-51 when a second toner image formed with only the magenta toner exhibits a maximum chroma; and lightness L* C is in the range of 53-70 when a third toner image formed with only the cyan toner exhibits a maximum chroma; and wherein the yellow toner contains yellow colorants selected from each of the following Group X and Group Y, and a weight ratio of the yellow colorant selected from Group X to the other yellow colorant selected from the Group Y is 65:35-95:5; Group X: C.I. pigment yellow 3, C.I. pigment yellow 3, C.I. pigment yellow 35, C.I. pigment yellow 65, C.I. pigment yellow 74, C.I. pigment yellow 98 and C.I. pigment yellow 11; Group Y: C.I. pigment yellow 9, C.I. pigment yellow 36, C.I. pigment yellow 83, C.I. pigment yellow 110, C.I. pigment yellow 139, C.I. pigment yellow 181 and C.I. pigment yellow 153.