POLYCHROMATIC RECORDING DEVICE

PURPOSE:To form a clear image without color mixture all the time by mixing particulares for mixed toner polarity inversion with a developer after the 2nd developing device and separating and removing mixed toner. CONSTITUTION:The 1st carrier 41 and red toner 43 are used in the 1st developing device 4 of the dichroic recording device and the 2nd carrier 42 and black toner 44 are used in the 2nd developing device 7. Then, several - tens of % of particulates 45 for mixed toner polarity nversion which have a frictional electrostatic charging sequence between the red toner 43 and black toner 44 are mixed in the 2nd develoing device 7. Therefore, even if the plus red toner 43 from a precedent stage enters the 2nd developing device 7, it is charged and changed to the negative polarity by charged electrostatically by friction against particulates 45 and removed from a magnetic roller surface by combining with the black toner 44. Consequently, clear images having no color mixture are obtained all the time.