TONER

A toner including a toner particle and an external additive, wherein the external additive contains an inorganic fine particle A and a silica fine particle; in a surface of the toner observed using a scanning electron microscope, a number-average particle diameter of primary particle of the silica f...

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Bibliographische Detailangaben
Hauptverfasser: Terauchi, Kazuo, Hotta, Yojiro, Sato, Kazuyuki, Furui, Takaaki, Yoshida, Yu, Kosaki, Yusuke, Nishikawa, Koji, Nagata, Ryo, Tanaka, Keisuke, Fujimoto, Masami
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A toner including a toner particle and an external additive, wherein the external additive contains an inorganic fine particle A and a silica fine particle; in a surface of the toner observed using a scanning electron microscope, a number-average particle diameter of primary particle of the silica fine particle is from 5 nm to 50 nm, a number-average particle diameter of primary particle of the inorganic fine particle A is at least 10 nm and less than 60 nm, a coverage ratio X1 of the toner surface covered by the silica fine particle is from 60 area % to 95 area %, the inorganic fine particle A is a fine particle of a titanate having a Group 2 element, and a coverage ratio X2 of the toner surface covered by the inorganic fine particle A is from 5 area % to 40 area %.