CPC G03G 9/08755 (2013.01) [C08G 63/16 (2013.01); C08G 63/195 (2013.01); G03G 9/083 (2013.01); G03G 9/0874 (2013.01)] | 6 Claims |
1. A positively chargeable magnetic toner comprising toner particles, wherein
the toner particles each include a toner mother particle including a polyester resin domain, a vinyl resin domain, and a magnetic powder,
a vinyl resin constituting the vinyl resin domain includes a repeating unit having a non-ring-opened oxazoline group,
a polyester resin constituting the polyester resin domain includes a repeating unit derived from tri- or higher-basic carboxylic acid,
the repeating unit derived from the tri- or higher-basic carboxylic acid has a content ratio to all repeating units derived from carboxylic acid in the polyester resin of at least 0.5% by mole and no greater than 1.5% by mole,
an area rate of an area in which the vinyl resin domain is exposed in a surface area of the toner mother particle is at least 0.02% and no greater than 1.00%, and
the magnetic toner is used as a one-component developer.
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