Full-color image-forming method, and two-component developer kit for forming full-color images

A full-color image-forming method comprising:

• a charging step of charging an electrostatic-image-bearing member electrostatically;
• a latent-image-forming step of forming an electrostatic latent image on the electrostatic-image-bearing member having been charged;
• a developing step of developing the electrostatic latent image by the use of a developer held in a developing assembly, to form a toner image;
• a transfer step of transferring to a transfer material the toner image having been formed;
• and
• a fixing step of fixing the toner image to the transfer material,
• said developer used in said developing step comprising a plurality of color developers and a black developer,
• said color developers being each a two-component developer for full-color image formation which has i) a color toner having color toner particles containing at least a binder resin, a colorant and a wax and ii) a carrier for the color developer,
• said black developer being a two-component developer for full-color image formation which has i) a black toner having black toner particles containing at least a binder resin, carbon black and a wax and ii) a carrier for the black developer,
• each of said color toners and said black toner are charged with the same polarity in said developing step, and
• said carrier for the black developer having a larger absolute value of charge quantity when the same toner is used, than the respective carriers for the color developers.