| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a toner achieving transfer property even on paper with a large roughness degree such as recycled paper, as well as having excellent low-temperature fixability, hot offset resistance and durability. <P>SOLUTION: The toner comprises toner particles containing at least a binder resin, a colorant, wax and silica particles A, wherein the silica particles A have a number average particle diameter of 60 nm or more and 300 nm or less of the primary particles thereof, and are firmly adhered to the surfaces of the toner particles by a treatment using a hot blast. When the theoretical coverage of the toner particle surface with the silica particles A, the coverage of the toner particle surface with the silica particles A calculated by X-ray photoelectron spectroscopy, and the number average particle diameter of the primary particles of the silica particles A are denoted by A (%), B (%) and D<SB POS="POST">A</SB>, respectively, an exposure height of the silica particle A defined by [D<SB POS="POST">A</SB>/2-D<SB POS="POST">A</SB>/2(1-B/A)<SP POS="POST">1/2</SP>] is 30 nm or more, and the coverage B is 5% or more and 45% or less. <P>COPYRIGHT: (C)2013,JPO&INPIT |
