JPS5458032A - Developing agent for zerography and dichroic image development - Google Patents

Abstract

PURPOSE: To reduce the cost for zerography and to make the cloration clear with the single chromatic exposure and a kind of developing agent by containing preset three coloring agents in a developing liquid using a magnetic roller.

CONSTITUTION: A photoconductive layer 9 is charged at a positive polarity and is subjected to image exposure with a white light 12 through a cyanogen filter 11 and an original 10. The electrostatic latent image corresponding to black and red portions is developed with a developing liquid 13 containing a sublime cyanogen dye. The toner image is transferred to a transfer material 14 by a transferring corona charger 15 and is thermally fixed by a fixing heat source 17. In this meanwhile, the cyanogen dye sublimes at 18, and the toner image 16 is turned into a red image by the actions of Magenta and yellow dyes. The layer 9 is charged again and then is subjected image exposure through a red filter 19 and the original 10. On the other hand, the electrostatic latent image corresponding to the black portions is developed with the liquid 13 and then is transfered to the material 14 by the charger 15. The resultant toner image 20 is fixed by a fixing heat source 17' in a manner that the cyanogen dye may not sublime

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