| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for development in which good printing quality can be maintained for a long time and print with white voids is not caused at high temperature and high humidity or fog is extremely little. SOLUTION: The developing roller has a surface layer 30 to come into contact with a nonmagnetic single component developer on a core metal 31. The surface layer 30 consists of organopolysiloxane expressed by average composition formula (RnSiO) (in the form of spherical silicone elastomer particles having 1 to 30μm average particle size) and a semiconducting silicone rubber composition containing a conductive material and hydrophobic silica having >=70% hydrophobicity degree. |
