Two-component developer, replenishing developer, and image-forming method
US8114562B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2010 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Jul 17, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A two-component developer containing a yellow toner and a magnetic carrier, wherein the yellow toner has the characteristics: (i) when the concentration of the yellow toner in a solution of the yellow toner in chloroform is represented by Cy (mg/ml) and the absorbance of the solution at a wavelength of 422 nm is represented by A422, a relationship between Cy and A422 satisfies the relationship of 6.00<A422/Cy<14.40; (ii) the lightness L* and chroma C* of the yellow toner determined in a powder state satisfy the relationships of 85.0≦L*≦95.0 and 100.0≦C*≦115.0; and (iii) the absolute value for the triboelectric charge quantity of the yellow toner measured by a two-component method using the yellow toner and the magnetic carrier is 50 mC/kg or more and 120 mC/kg or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.