For the 3-level highlight color imaging, a 1-pass process with combinations of charged and discharged area developments is used. It has an advantage for excellent gradation images between black and color because of perfect color registration. Otherwise, there are some unique problems of fringe images, blur, white spots in the 2nd color images, etc. Employing very low resistance developer gives a solution for these problems. However, this method causes developing instability due to a charge leakage instead.The highly stable 3-level process without the problems, employing the higher resistance developer without the charge leakage and applying newly developed edge effect control technology and the 1st color developing station with dual rotation rollers, are proposed in this study.Finally a stable process and an excellent highlight color image can be provided.