| 摘要 |
PURPOSE:To print a black color whose density is high and whose wavelength characteristic of light absorption is flat by using cyan toner, magenta toner, yellow toner and black toner which transmits infrared light and absorbs visible light and performing exposure with red light, green light, blue light and the infrared light. CONSTITUTION:The surface of an electrophotographic photosensitive body 1 is electrostatically charged, and the cyan toner C which transmits the blue light and the green light and absorbs the red light, the magenta toner M which transmits the blue light and the red light and absorbs the green light, the yellow toner Y which transmits the green light and the red light and absorbs the blue light, and the black toner BL which transmits the infrared light and absorbs the visible light (red light, green light and blue light) are uniformly stuck to the surface to become one layer every color. Then the exposure is performed with the red light, the green light, the blue light and the infrared light. Thus, the excellent black color whose density is high and whose wavelength characteristic of the light absorption is flat is printed. |
