| 摘要 |
PROBLEM TO BE SOLVED: To obtain an image forming device constituted so that a sharp high- quality image can be obtained by preventing image flowing from occurring under a high temperature and high humidity environment and preventing fogging from occurring under a low temperature and low humidity environment. SOLUTION: This image forming device 100 is provided with at least a photoreceptor 1 being an image carrier carrying the image, an electrifying roller (electrification device) 2 electrifying the photoreceptor 1 by electrifying bias, a developing device 7 developing a latent image formed on the photoreceptor 1 by impressing developing bias on a developing sleeve (developer carrier) 10 supporting and carrying toner (developer) 8 and a transfer roller (transfer device) 13 transferring a toner image(developer image) formed on the photoreceptor 1 to a transfer material by transfer bias. Then, two or more kinds of toner 8 whose content of grains electrified to have the reverse polarity to the toner 8 are different can be used. Besides, the device 100 is provided with a control means changing at least one of the electrifying bias, the developing bias and the transfer bias according to the kind of toner 8 which is used. |
