Claims
- 1. A developing agent, comprising:toner particles containing a binder resin and a colorant, said binder resin satisfying the conditions of: 2,000≦number average molecular weight Mn≦5,000; 8,000≦weight average molecular weight Mw≦70,000; and 1.6≦Mw/Mn≦35; and an additive mixed with said toner particles, wherein said developing agent satisfies the relationship y<0.057x+0.1748, where x represents the total amount of the additive, which is not smaller than 0.2, and y represents the content of the free component of the additive.
- 2. The developing agent according to claim 1, wherein said additive is a hydrophobic silica.
- 3. The developing agent according to claim 1, wherein said binder resin is a polyester resin.
- 4. The developing agent according to claim 1, further comprising a charge controlling agent consisting of a zirconia complex.
Priority Claims (1)
Number |
Date |
Country |
Kind |
11-269266 |
Sep 1999 |
JP |
|
Parent Case Info
This is a Divisional Application of application Ser. No. 09/658,381, filed Sep. 8, 2000, now U.S. Pat. No. 6,316,154.
Non-Patent Literature Citations (1)
Entry |
Abstract of JP410019811A, Jan. 1998. |