Patent ID: 8980517
Filing Date: 2015-03-17
Classification: G03G

Abstract:
1. A toner comprising: toner particles each including a surface layer that contains an organic silicon polymer, the organic silicon polymer including a unit represented by formula (1) or (2) below: (In formula (2), L represents a methylene group, an ethylene group, or a phenylene group), wherein, an average thickness Dav. of the surface layers measured by observation of cross sections of the toner particles with a transmission electron microscope is 5.0 nm or more and 150.0 nm or less, a silicon concentration determined by electron spectroscopy for chemical analysis performed on surfaces of the toner particles is 2.5 atomic % or more, the toner has a shape factor SF-2 of 140 or more and 260 or less, and the toner has an average circularity of 0.970 or more and 0.990 or less.