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AssigneeFuji Xerox Co., Ltd.
InventorsHiroyoshi Okuno, Akira Matsumoto, Tsutomu Kubo, Teigen Lee, Yuusaku Shibuya, Yutaka Sugizaki
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A toner for developing an electronic latent image, including toner particles containing a binder resin and a colorant, and an external additive, is provided. The external additive contains silica formed by a sol-gel method of which the surface is subjected to hydrophobic treatment and which has an average primary particle size of 80 to 300 nm, a water content of 3 to 15% and a volume resistivity of 1×1013 Ωcm or more. The invention further provides an image forming method and an image forming apparatus using the same. The toner for developing an electrostatic latent image is good in transferability over a long period of time and gives a high image quality without causing an image defect.
A toner for developing an electrostatic latent image, comprising a toner particle containing a binder resin, a colorant and an external additive, the external additive containing a silica formed by a sol-gel method, whose surface is treated to be hydrophobic and which has an average primary particle size of 80 to 300 nm, and which has a water content of 3 to 15% and a volume resistivity of 1×1013 Ωcm or more.
Dependencies are inferred from the claim text.