Color image forming method and color image forming apparatus
US9110418B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2013 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Sep 3, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/6582
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color image forming method, including: forming electrostatic latent image on electrostatic latent image bearing member; developing the image to form visible image with at least two toners containing releasing agent and selected from black, magenta, cyan and yellow toners; transferring the visible image to recording medium; fixing the transferred image thereon with fixing member having no releasing agent on surface thereof; and forming overcoat layer on the fixed image by polymerizing overcoat composition, wherein when lightness—L1, chromaticity—a1 and chromaticity—b1 according to L*a*b* color system of the fixed image formed with the at least two toners and lightness—L2, chromaticity—a2 and chromaticity-b2 of the fixed image after the overcoat composition is dropped at 0.4 mg/cm2 from height of 10 mm above the fixed image and the overcoat composition is removed after 10 seconds have passed are applied to the following formula (1), color difference ΔE* is 3.0 to 30.0:ΔE*=[(a2−a1)2+(b2−b1)2+(L2−L1)2]1/2 (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.