TONER

A toner comprising: a toner particle including a binder resin; and an external additive, wherein the external additive includes an external additive A which is silica fine particles and an external additive B which is a fatty acid metal salt, the external additive A has a specific particle diameter,...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Fumita, Hidekazu, Otsuji, Satoshi, Matsunaga, Tomonori, Umeda, Noriyoshi
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A toner comprising: a toner particle including a binder resin; and an external additive, wherein the external additive includes an external additive A which is silica fine particles and an external additive B which is a fatty acid metal salt, the external additive A has a specific particle diameter, a coverage ratio of a surface of the toner particle with the external additive A is from 60% to 80%, and where an average theoretical surface area obtained from a number average particle diameter, a particle size distribution and a true density of the toner particle is denoted by C (m2/g), an amount of the external additive B is denoted by D (parts by mass) and a coverage ratio of the surface of the toner particle with the external additive B is denoted by E (%), following formulas are satisfied:0.05≤D/C≤2.00E/(D/C)≤50.0.