PHOTOLUMINESCENT TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD

• Main Authors: TAKAHASHI MASARU, HIRAI SAKIKO, NAKAMURA YUKIAKI, TAKAHASHI SHOTARO
• Format: Patent
• Language: English; Japanese
• Published: 04.08.2016
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a photoluminescent toner that can form an image having suppressed unevenness in luminosity.SOLUTION: There is provided a photoluminescent toner comprising toner particles including a flat photoluminescent pigment having an area average particle diameter of 5 μm or more and 15 μm or less, a volume average particle diameter distribution index GSDV, U obtained from the following formula (1) of 1.25 or more and 1.70 or less, and a volume average particle diameter distribution index GSDv, D obtained from the following formula (2) of 1.10 or more and 1.40 or less. The formula (1): GSDv, U=(D84v/D50v); the formula (2): GSDv, D=(D50v/D16v). In the formulas (1) and (2), D84v represents a particle diameter at an accumulation of 84% from a small diameter side in a cumulative distribution based on volume of the photoluminescent pigment; D50v represent a particle diameter at an accumulation of 50% from the small diameter side in the cumulative distribution; D16v represent a particle diameter at an accumulation of 16% from the small particle side in the cumulative distribution.SELECTED DRAWING: None 【課題】光輝感のムラが抑制された画像を形成しうる光輝性トナーを提供すること。【解決手段】面積平均粒径が５μｍ以上１５μｍ以下で、下記式（１）から求めた体積平均粒度分布指標ＧＳＤｖ，Ｕが１．２５以上１．７０以下であり、且つ、下記式（２）から求めた体積平均粒度分布指標ＧＳＤｖ，Ｄが１．１０以上１．４０以下である扁平状の光輝性顔料を含むトナー粒子、を有する光輝性トナー。式（１） ＧＳＤｖ，Ｕ＝（Ｄ８４ｖ／Ｄ５０ｖ）１／２式（２） ＧＳＤｖ，Ｄ＝（Ｄ５０ｖ／Ｄ１６ｖ）１／２〔式（１）及び式（２）中、Ｄ８４ｖは、光輝性顔料の体積基準の累積分布において小径側から累積８４％となる粒径を表し、Ｄ５０ｖは、前記累積分布において小径側から累積５０％となる粒径を表し、Ｄ１６ｖは、前記累積分布において小径側から累積１６％となる粒径を表す。〕【選択図】なし