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AssigneeRicoh Company, Ltd.
InventorsChiaki Tanaka, Naohiro Watanabe, Masahiro Ohki, Masahide Yamada, Akinori Saitoh, Sonoh Matsuoka, Ryota Inoue, Shigeru Emoto
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An object of the present invention is to provide a toner having small-sized and potato-shaped particles created from multiple coherent spherical particles for excellent cleaning ability and high image quality, an image-forming method that realizes high image quality using the toner, and the like. To this end, there is provided a toner, which is produced by granulating toner materials as an organic phase comprising at least a binder resin and a colorant in an aqueous medium and has potato-shaped particles created from multiple coherent primary oil droplets of the organic phase in the aqueous medium.
A toner, which is produced by a process comprising:
A toner, which is produced by granulating in an aqueous medium comprising at least a binder resin and a colorant, wherein the toner contains 10% by number or less of cracked or disintegrated toner particles per 1000 toner particles in electronic microscopic observation after 50 g of a developer consisting of 2.5 g of the toner and 47.5 g of a carrier is stirred in a 100 ml jar at 50 Hz for 30 minutes using a paint conditioner.
Dependencies are inferred from the claim text.