The plural charging devices are necessary to charge a photoconductor for a latent image formation in color laser printing systems. In this research, characteristics of the charging device for a liquid toner based color printing system have been investigated. To develop a mathematical model for the photoconductor charging characteristics, the charging current to the photoconductor can be determined by experimental investigations. The experimental set-up consists of the primary charging part and the secondary charging part, and this carries out to investigate the charging characteristics of the device. Once the mathematical model is developed, the parametric design of the charging device for the proposed system can be conducted through simulation runs and compared with experiments. The complete design is adapted and performed with Samsung's color printing system.