Electrostatic charge image developing toner, electrostatic charge image developer, and toner cartridge

1. An electrostatic charge image developing toner comprising:

kneaded and pulverized toner particles that contain a binder resin and a release agent, the release agent being partially exposed; and

an external additive that contains silica particles having a compression aggregation degree of from 60% to 95% and a particle compression ratio of from 0.20 to 0.40.

2. The electrostatic charge image developing toner according to claim 1 , wherein an average equivalent circle diameter of the silica particles is from 40 nm to 200 nm.

3. The electrostatic charge image developing toner according to claim 1 , wherein a particle dispersion degree of the silica particles is from 90% to 100%.

4. The electrostatic charge image developing toner according to claim 1 , wherein an average circularity of the silica particles is from 0.85 to 0.98.

5. The electrostatic charge image developing toner according to claim 1 , wherein the silica particles are sol-gel silica particles.

6. The electrostatic charge image developing toner according to claim 1 , wherein the binder resin is polyester resin.

7. The electrostatic charge image developing toner according to claim 1 , wherein the silica particles are silica particles that are surface-treated with a siloxane compound having a viscosity of from 1,000 cSt to 50,000 cSt, and a surface attachment amount of the siloxane compound is from 0.01% by weight to 5% by weight.

8. The electrostatic charge image developing toner according to claim 7 , wherein the siloxane compound is silicone oil.

9. An electrostatic charge image developer comprising:

the electrostatic charge image developing toner according to claim 1 .

10. A toner cartridge comprising:

a container that contains the electrostatic charge image developing toner according to claim 1 ,

wherein the toner cartridge is detachable from an image forming apparatus.