One component developer which features that

摘要

PROBLEM TO BE SOLVED: To provide a single-component developer, which will not deposit or fix and further to a blade or a fixing member which is made oilless and which will not cause deterioration in image quality for long-term printing. SOLUTION: The single-component developer consists of 100 pts.wt. of toner particles containing a binder, coloring agent and as necessary, staticization controll agent and release agent and 0.1 to 3 pts.wt. of coated metal oxide fine particles prepared by coating metal oxide fine particles, having 50 to 300 m2/g specific surface area with at least one kind of lubricant selected from among a group of higher fatty acids, higher fatty acid amides, higher fatty acid esters and higher fatty acid metal salts.