Toner for developing electrostatic charged images and developer for developing electrostatic charged images, and image forming method using the same
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United States of America Patent
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May 8, 2007
Grant Date -
Jul 28, 2005
app pub date -
Sep 8, 2004
filing date -
Jan 28, 2004
priority date (Note) -
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Abstract
The invention provides a toner for developing electrostatic charged images comprising toner mother particles containing a binder resin and a colorant, and an external additive, wherein: the average of shape factors SF1 of the toner mother particles represented by the following Formula (1) is 140 or less; the external additive contains higher alcohol particles having a volume-average particle diameter of 1 to 12 .mu.m; and the content of the higher alcohol particles having a diameter equal to or less than the volume-average particle diameter of the toner mother particles is in a range of 0.15 to 2.5 parts by weight with respect to 100 parts by weight of the toner mother particles. In addition, the invention provides a developer for developing electrostatic charged images comprising the toner. Further, the invention provides an image forming method using the toner.
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