| CPC G03G 15/0808 (2013.01) [G03G 9/0804 (2013.01); G03G 9/0817 (2013.01); G03G 15/0812 (2013.01); G03G 15/0868 (2013.01); G03G 15/5004 (2013.01); G03G 21/0011 (2013.01); G03G 2215/0643 (2013.01)] | 17 Claims |
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1. A cartridge, comprising:
a toner;
a developing roller carrying on a surface thereof the toner;
a developer container rotatably supporting the developing roller;
a toner accommodating portion accommodating the toner;
a supply member abutting the surface of the developing roller and supplying the toner from the toner accommodating portion to the surface of the developing roller; and
a regulating member abutting the surface of the developing roller and regulating the toner carried on the surface of the developing roller, wherein
the cartridge comprises a first supply electrode to which a voltage is supplied from outside of the cartridge,
the supply member and the regulating member are electrically connected to the same first supply electrode,
the toner comprises a compound A having a structure represented by Formula (1) below,
—(CH2CH2O)— (1)
the compound A is eluted in methanol when elution treatment of the toner is carried out under an elution condition A below, and
in a case where a supernatant obtained by centrifuging an eluate of the compound A eluted in the methanol under a centrifugation condition A below is analyzed within a range of m/z=50 to 1500 by liquid chromatograph ESI/MS, a reference peak defied as follows is present, and an average m/z defined as follows is 300 to 1000:
Elution condition A: Methanol (a product equivalent to JIS K8891) in an amount of ten times that of the toner by mass is used, and a mixture thereof is stirred at 25° C. at a rotor rotation speed of 200 rpm for 10 hours with a stirring apparatus;
Centrifugation condition A: Rotation is performed with a rotation radius of 10.1 cm and a rotation speed of 3500 rpm at 25° C. for 30 minutes;
Reference peak: A relative abundance is obtained on the assumption that an abundance of a peak of a highest strength in a mass analysis spectrum obtained by liquid chromatograph ESI/MS of the supernatant is 100%; peaks are chosen in a descending order of relative abundance, and a m/z value of a peak top of the chosen peak is defined as P; and a chosen peak with a highest relative abundance is defined as the reference peak from among the chosen peaks including peaks with a relative abundance of not less than 10% and with m/z values of P +44 or P −44 at peak tops;
Average m/z: The m/z value at the peak top of the reference peak is defined as Ps, the m/z value at the peak top=Ps+44n (n is an integer), and an average value of m/z at peak tops of peaks with a relative abundance of not less than 30% is defined as an average m/z.
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