Toner set, electrostatic charge image developer set, toner cartridge set, process cartridge, image forming apparatus, and image forming method

1 . A toner set comprising:

a white toner; and

a color toner,

wherein in a case where Cw [mg/L] represents an amount of a cation on a surface of the white toner, measured by ion chromatography, and Cc [mg/L] represents an amount of a cation on a surface of the color toner, measured by ion chromatography, the toner set satisfies Conditions (1) and (2′),

0.3 mg/L≤ Cc≤ 1.2 mg/L  (1)

0.3≤( Cw/Cc )≤0.8.  (2′)

2 . The toner set according to claim 1 ,

wherein the toner set satisfies Condition (3),

0.1 mg/L≤ Cw≤ 0.6 mg/L.  (3)

3 . The toner set according to claim 1 ,

wherein in a case where Bw [m 2 /g] represents a BET specific surface area of the white toner, and Bc [m 2 /g] represents a BET specific surface area of the color toner, the toner set satisfies Condition (4),

( Cw/Bw )<( Cc/Bc ).  (4)

4 . The toner set according to claim 1 ,

wherein in a case where Dw [μm] represents a volume-average particle size of the white toner, the toner set satisfies Condition (5),

( Cw/Dw )≤0.05.  (5)

5 . The toner set according to claim 1 ,

wherein the white toner contains white toner particles and zinc stearate particles as an external additive, and

in a case where Zw [% by mass] represents an amount of the zinc stearate particles added to an exterior of the white toner particles, and Bw [m 2 /g] represents a BET specific surface area of the white toner, the toner set satisfies Condition (6),

0.05≤( Zw/Bw )≤0.15.  (6)

6 . The toner set according to claim 5 ,

wherein the toner set satisfies Condition (7),

0.7 m 2 /g≤ Bw≤ 1.2 m 2 /g.  (7)

7 . The toner set according to claim 1 ,

wherein the color toner contains color toner particles and zinc stearate particles as an external additive, and

in a case where Zc [% by mass] represents an amount of the zinc stearate particles added to an exterior of the color toner particles, and Bc [m 2 /g] represents a BET specific surface area of the color toner, the toner set satisfies Condition (8),

0.20≤( Zc/Bc )≤0.40.  (8)

8 . The toner set according to claim 7 ,

wherein the toner set satisfies Condition (9),

1.0 m 2 /g≤ Bc≤ 1.3 m 2 /g.  (9)

9 . The toner set according to claim 1 ,

wherein in a case where Sw [pop %] represents an amount of a small-particle-size component having a particle size of 3 μm or less in the white toner, Sc [pop %] represents an amount of a small-particle-size component having a particle size of 3 μm or less in the color toner, SFw represents a circularity of the small-particle-size component in the white toner, and SFc represents a circularity of the small-particle-size component in the color toner, the toner set satisfies Conditions (10) and (11),

Sw>Sc   (10)

SFw<SFc.   (11)

10 . The toner set according to claim 1 ,

wherein the cation on the surface of the white toner and the cation on the surface of the color toner, respectively is one or more kinds of cations selected from an alkali metal and an alkaline earth metal.

11 . The toner set according to claim 1 ,

wherein the cation on the surface of the white toner and the cation on the surface of the color toner, respectively is a sodium ion.

12 . An electrostatic charge image developer set comprising:

a first electrostatic charge image developer containing the white toner in the toner set according to claim 1 ; and

a second electrostatic charge image developer containing the color toner in the toner set according to claim 1 .

13 . An electrostatic charge image developer set comprising:

a first electrostatic charge image developer containing the white toner in the toner set according to claim 2 ; and

a second electrostatic charge image developer containing the color toner in the toner set according to claim 2 .

14 . An electrostatic charge image developer set comprising:

a first electrostatic charge image developer containing the white toner in the toner set according to claim 3 ; and

a second electrostatic charge image developer containing the color toner in the toner set according to claim 3 .

15 . A toner cartridge set comprising:

a first toner cartridge that has a container containing the white toner in the toner set according to claim 1 ; and

a second toner cartridge that has a container containing the color toner in the toner set according to claim 1 ,

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

16 . A process cartridge comprising:

a first developing unit that contains the first electrostatic charge image developer in the electrostatic charge image developer set according to claim 12 ; and

a second developing unit that contains the second electrostatic charge image developer in the electrostatic charge image developer set according to claim 12 ,

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

17 . An image forming apparatus comprising:

a first image forming unit that forms a first image by the white toner in the toner set according to claim 1 ;

a second image forming unit that forms a second image by the color toner in the toner set according to claim 1 ;

an intermediate transfer member to which the first image and the second image are transferred;

a primary transfer unit that transfers the first image and the second image to a surface of the intermediate transfer member;

a secondary transfer unit that transfers the first image and the second image transferred to the surface of the intermediate transfer member to a surface of a recording medium;

an intermediate transfer member-cleaning unit that has a blade coming into contact with the surface of the intermediate transfer member and cleans the surface of the intermediate transfer member by the blade; and

a fixing unit that fixes the first image and the second image to the surface of the recording medium.