Patent ID: 9715185
Date: 2017-07-25
CPC Classifications: G03G

Claim:
1. An electrostatic-image developing toner comprising: a toner particle including a polyester resin and a styrene-(meth)acrylic resin; and an external additive including a poly[alkyl (meth)acrylate] particle, an amount of the poly[alkyl (meth)acrylate] particles being about 0.05 parts by mass or more and about 1.0 parts by mass or less relative to 100 parts by mass of the toner particle, a ratio D50 a proportion of the styrene-(meth)acrylic resin in a resin component deposited on a surface of the toner particle being about 5 atom % or more and about 30 atom % or less as determined by X-ray photoelectron spectroscopy (XPS), and a ratio of a packed bulk density of the toner after storage to a packed bulk density of the toner before storage, that is, packed bulk density after storage/packed bulk density before storage, is about 1.03 or less, wherein packed bulk density is measured as follows: wherein the packed bulk density after storage is determined using toner that has been stored in a toner cartridge at 40° C. for 20 hours.