Latent electrostatic image developing toner

摘要

A toner including: a core particle containing at least a binder resin, a colorant and a releasing agent; and a shell on a surface of the core particle, wherein the toner gives a supernatant having a transmittance of 50% to 95% with respect to light having a wavelength of 800 nm, where the supernatant is formed after 3 g of the toner is added to 40 g of ion-exchange water containing 0.5% by mass of sodium dodecyl sulfate, followed by stirring for 90 min and by irradiating with ultrasonic waves of 20 kHz and 80 W for 5 min, and a liquid containing the toner dispersed therein is centrifugated at 3,000 rpm for 5 min.

主权项

1. A toner, comprising:
a core particle comprising a binder resin, a colorant and a releasing agent; and a shell on a surface of the core particle, wherein a supernatant of the toner has a transmittance of 50% to 95% with respect to light having a wavelength of 800 nm, where the supernatant is obtained by adding 3 g of the toner to 40 g of ion-exchange water comprising 0.5% by mass of sodium dodecyl sulfate to form a mixture, stirring the mixture for 90 min, irradiating the mixture with ultrasonic waves of 20 kHz and 80 W for 5 min, and then centrifuging the mixture at 3,000 rpm for 5 min.