LIQUID DEVELOPER

• Main Authors: HIRASA TAKASHI, IDA HAYATO, NAKAJIMA MASAHITO, AKASHI YASUHISA, TAKENAKA KOJI, TSUCHIDA NAOHIKO, MATSUBARA AKIFUMI, OCHI KOICHIRO, TOKUNAGA YUZO, MIYAGAI TOMOYO, CHIMOTO YUYA
• Format: Patent
• Language: English; Japanese
• Published: 27.05.2021
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

To provide a liquid developer having good developability and transferability.SOLUTION: A liquid developer includes carrier liquid and toner particles. The toner particles include toner particles A with an equivalent circle diameter of 0.70 μm or more and 1.50 μm or less in an amount of 30% by volume or more and 70% by volume or less, and include toner particles B with an equivalent circle diameter of 0.20 μm or more and less than 0.60 μm in an amount of 30% by volume or more and 70% by volume or less. The liquid developer includes the toner particles A and the toner particles B in an amount of 80% by volume or more and 100% by volume or less. The toner particles A include toner particles a with a shape factor SF1 of 100 or more and 120 or less and a shape factor SF2 of 100 or more and 120 or less in an amount of 85% by number or more and 100% by number or less. The toner particles B include toner particles b with a shape factor SF1 of 130 or more and 200 or less and a shape factor SF2 of 130 or more and 160 or less in an amount of 30% by number or more and 100% by number or less.SELECTED DRAWING: None 【課題】 現像性および転写性が良好である液体現像剤を提供する。【解決手段】 キャリア液およびトナー粒子を含有する液体現像剤であって、トナー粒子は、円相当径が０．７０μｍ以上１．５０μｍ以下のトナー粒子Ａを３０体積％以上７０体積％以下含み、円相当径が０．２０μｍ以上０．６０μｍ未満のトナー粒子Ｂを３０体積％以上７０体積％以下含み、トナー粒子Ａおよびトナー粒子Ｂを８０体積％以上１００体積％以下含み、トナー粒子Ａは、形状係数ＳＦ１が１００以上１２０以下かつ形状係数ＳＦ２が１００以上１２０以下のトナー粒子ａを８５個数％以上１００個数％以下含み、トナー粒子Ｂは、形状係数ＳＦ１が１３０以上２００以下かつ形状係数ＳＦ２が１３０以上１６０以下のトナー粒子ｂを３０個数％以上１００個数％以下含む。【選択図】 なし