Brilliant toner, electrostatic charge image developer, and toner cartridge
A brilliant toner includes release agent domains meeting conditions (1) a length of the release agent domain in a longitudinal axis direction is 300 nm to 1,500 nm, (2) a ratio between the length in the longitudinal axis direction and in a short axis direction of the release agent domain is 3.0 to 15.0, (3) an angle between (a) a tangent line passing through a contact point of (a1) a circumference of a circle that is centered at a centroid of the release agent domain and is inscribed in an outer edge of the toner particle and (a2) the outer edge and (b) a line passing through the centroid and extending in the longitudinal axis direction is 0° to 45°, and (4) a ratio of a distance between the centroid and the contact point to an equivalent circle diameter of the toner particle is 0.03 to 0.25.
1. A brilliant toner comprising:
toner particles that contain a brilliant pigment and a release agent,
wherein the release agent forms release agent domains that meet the following conditions (1) to (4);
Condition (1): a length of the release agent domain in a longitudinal axis direction is from 300 nm to 1,500 nm;
Condition (2): a ratio between the length in the longitudinal axis direction and the length in a short axis direction of the release agent domain (the length in the longitudinal axis direction/the length in the short axis direction) is from 3.0 to 15.0;
Condition (3): an angle θ between (a) a tangent line passing through a contact point of (a1) a circumference of a circle that is centered at a centroid of the release agent domain and is inscribed in an outer edge of the toner particle and (a2) the outer edge and (b) a line passing through the centroid of the release agent domain and extending in the longitudinal axis direction of the release agent domain is from 0° to 45° ; and
Condition (4): a ratio of a distance A between the centroid of the release agent domain and the contact point to an equivalent circle diameter of the toner particle (distance A/equivalent circle diameter) is from 0.03 to 0.25.
2. The brilliant toner according to claim 1 ,
wherein a rate of the toner particles with respect to the entire toner particles is equal to or greater than 30% by number.
3. The brilliant toner according to claim 1 ,
wherein the brilliant pigment contains aluminum.
4. The brilliant toner according to claim 1 ,
wherein an aspect ratio of the brilliant pigment is from 5 to 200.
5. The brilliant toner according to claim 1 ,
wherein a melting temperature of the release agent is from 50° C. to 110° C.,
the toner particles includes a polyester resin having a glass transition temperature of 50° C. to 80° C., and
a ratio (Tm/Tg) between a melting temperature (Tm) and a glass transition temperature (Tg) of the release agent is from 1.0 to 2.2.
6. The brilliant toner according to claim 1 ,
wherein the toner particles include a core particle, a first shell layer that covers the core particle, and a second shell layer that covers the first shell layer, and the release agent domains are included in the first shell layer.
7. An electrostatic charge image developer comprising:
the brilliant toner according to claim 1 .
8. A toner cartridge comprising:
a container that contains the brilliant toner according to claim 1 ,
wherein the toner cartridge is detachable from an image forming apparatus.
9. The brilliant toner according to claim 1 , wherein the toner that has a ratio (A/B) from 2 to 100 between the reflectance A at the light receiving angle of +30° and the reflectance B at the light receiving angle of −30°, measured in a case where a solid image is formed and the solid image is irradiated with incident light with an incident angle of −45° by a varied-angle photometer.