Electrostatic latent image developing toner, electrostatic latent image developing toner manufacturing method, toner cartridge, image forming method, and image forming apparatus

1. An electrostatic latent image developing toner comprising:

a binder resin;

a colorant; and

a complex comprising europium and bismuth;

wherein a content A of europium in the toner measured by fluorescent X-ray analysis is in a range of from about 0.7% by weight to about 1.5% by weight, and a content B of bismuth in the toner measured by fluorescent X-ray analysis is in a range of from about 0.04% by weight to about 0.7% by weight.

2. The electrostatic latent image developing toner according to claim 1 , satisfying the following equation:

3 ≦A/B≦ 20

wherein A is the content (% by weight) of europium in the toner measured by fluorescent X-ray analysis, and B is the content (% by weight) of bismuth in the toner measured by fluorescent X-ray analysis.

3. The electrostatic latent image developing toner according to claim 1 , wherein the binder resin contains a polyester resin.

4. The electrostatic latent image developing toner according to claim 1 , further comprising at least one of tin and titanium.

5. The electrostatic latent image developing toner according to claim 4 , satisfying the following equation:

3 ≦A/C≦ 20

wherein A is the content (% by weight) of europium in the toner measured by fluorescent X-ray analysis, and C is the content (% by weight) of at least one of the tin and the titanium in a cross-section of the toner measured by transmission electron microscope energy dispersive X-ray analysis.

6. The electrostatic latent image developing toner according to claim 1 , containing at least one of a complex selected from the group consisting of YVO 4 :Eu,Bi complex, Y 2 O 3 :Eu,Bi complex and Y 2 O 2 S:Eu,Bi complex.

7. The electrostatic latent image developing toner according to claim 1 , wherein the colorant is a magenta colorant.

8. An electrostatic latent image developing toner manufacturing method comprising: kneading a toner forming material containing a binder resin, a colorant, and a compound containing europium and bismuth; cooling the kneaded material formed by kneading; pulverizing the kneaded material cooled by the cooling; and classifying the kneaded material pulverized by the pulverizing, to form the electrostatic latent image developing toner according to claim 1 .

9. A toner cartridge for an image forming apparatus comprising:

an accommodating portion that accommodates a toner,

wherein the toner is the electrostatic latent image developing toner according to claim 1 .

10. A toner cartridge for an image forming apparatus comprising:

an accommodating portion that accommodates a toner,

wherein the toner is the electrostatic latent image developing toner according to claim 2 .

11. An image forming method comprising:

charging a surface of an image holding member;

forming an electrostatic latent image on the surface of the image holding member;

developing the electrostatic latent image formed on the surface of the image holding member by a toner to form a toner image; and

transferring the developed toner image onto a transfer medium;

wherein the toner is the electrostatic latent image developing toner according to claim 1 .

12. The image forming method according to claim 11 , wherein the toner is an electrostatic latent image developing toner satisfying the following equation:

3 ≦A/B≦ 20,

wherein A is the content (% by weight) of europium in the toner measured by fluorescent X-ray analysis, and B is the content (% by weight) of bismuth in the toner measured by fluorescent X-ray analysis.