Ink set, ink jet recording method, ink cartridge, recording unit, ink jet recording method, and aqueous ink
US7988277B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2008 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Sep 15, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/40
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink set is provided which can suppress bleeding irrespective of the type of recording medium. The ink set includes a plurality of aqueous inks each containing a dye, and has at least a first aqueous ink containing a dye, wherein the difference between the dynamic surface tension of the first aqueous ink at a lifetime of 50 milliseconds and the dynamic surface tension of the first aqueous ink at a lifetime of 500 milliseconds is 7 mN/m or more; and, between the first aqueous ink and at least one type of aqueous ink except the first aqueous ink included in the ink set, dynamic surface tension γa (mN/m) of an ink A having relatively higher lightness at a lifetime of 500 milliseconds and dynamic surface tension γb (mN/m) of an ink B having relatively lower lightness at a lifetime of 500 milliseconds satisfy −5≦(γa−γb)≦3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.