Full-color recorder using potential split developing process

A full-color recorder comprising:

• a first potential split developing means having a first photoconductor, a first charger for charging a surface of said first photoconductor, a first exposure unit for forming image regions having potential levels of at least three different values including a first potential level, a second potential level being different from said first potential level and an intermediate potential level set between said first potential level and said second potential level on said first photoconductor by irradiating a light, a first developing unit for supplying a toner to said image region having said first potential level so as to form a toner image thereon, and a second developing unit for supplying a toner being different from said toner supplied to said image region having said first potential level to said image region having said second potential level so as to form a toner image thereon, wherein at least two kinds of toner images are formed on said first photoconductor;
• and
• a second potential split developing means having a second photoconductor, a second charger for charging a surface of said second photoconductor, a second exposure unit for forming image regions having potential levels of at least three different values including a first potential level, a second potential level being different from said first potential level and an intermediate potential level set between said first potential level and said second potential level on said second photoconductor by irradiating a light, a first developing unit for supplying a toner to said image region having said first potential level so as to form a toner image thereon, and a second developing unit for supplying a toner being different from said toner supplied to said image region having said first potential level to said image region having said second potential level so as to form a toner image thereon, wherein at least two kinds of toner images are formed on said second photoconductor;
• wherein said first potential split developing means and said second potential split developing means are arranged in series, two kinds of toners among toners of three primary colors of cyan, magenta and yellow are used in said first developing unit and said second developing unit provided in said first potential split developing means, and two kinds of toners among toners of said three primary colors including one toner which is not used in said first potential split developing means are used in said first developing unit and said second developing unit provided in said second potential split developing means.