Image forming method

An image forming method comprising:

• transferring a yellow toner image comprising a yellow toner, a magenta toner image comprising a magenta toner, a cyan toner image comprising a cyan toner and a black toner images comprising a black toner on an imaging support,
• wherein the yellow toner, the magenta toner, the cyan toner and the black toner satisfy a condition represented by Formulas 1 to 4,
• 0≦R1≦0.2 Formula 1
• wherein R1={(The maximum value of Ky, Km, Kc and Kb)−(The minimum value of Ky, Km, Kc and Kb)}/(The maximum value of Ky, Km, Kc and Kb)
• 0≦R2≦0.30 Formula 2
• wherein R2={(The maximum value of Kσy, Kσm, Kσc and Kσb)−(The minimum value of Kσy, Kσm, Kσc and Kσb)}/(The maximum value of Kσy, Kσm, Kσc and Kσb)
• 0≦R3≦0.15 Formula 3
• wherein R3={(The maximum value of Dy, Dm, Dc and Db)−(The minimum value of Dy, Dm, Dc and Db)}/(The maximum value of D, Dm, Dc and Db)
• 0≦R4≦0.30 Formula 4
• wherein R4={(The maximum value of Dσy, Dσm, Dσc and Dσb)−(The minimum value of Dσy, Dσm, Dσc and Dσb)}/(The maximum value of Dσy, Dσm, Dσc and Dσb),
• wherein a shape coefficient Ky, a variation coefficient of the shape coefficient Kσy, a number average of particle diameter Dy and a variation coefficient of the number of the particle size distribution Dσy of the yellow toner;
• a shape coefficient Km, a variation coefficient of the shape coefficient Kσm, a number average of particle diameter Dm and a variation coefficient of the number of the particle size distribution Dσm of the magenta toner;
• a shape coefficient Kc, a variation coefficient of the shape coefficient Kσc, a number average of particle diameter Dc and a variation coefficient of the number of the particle size distribution Dσc of the cyan toner;
• and
• a shape coefficient Kb, a variation coefficient of the shape coefficient Kσb, a number average of particle diameter Db and a variation coefficient of the number of the particle size distribution Dσb of the black toner are represented.