Ink and ink-jet recording method using the same
US7169217B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2004 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Dec 9, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink containing water, a water-soluble organic solvent and a colorant, wherein the ink exhibits a (γ cos θ)1/2 value of 4 to 6, and satisfies Formula (I): 0.3≦((γ′ cos θ′)1/2/(γ cos θ)1/2)≦0.85, wherein γ represents a surface tension (mN/m) of the ink upon initial exposure to atmospheric conditions, θ represents an initial contact angle of the ink with respect to plain paper upon initial exposure to atmospheric conditions; and γ′ represents a surface tension (mN/m) of the ink after standing for one hour at 40° C. and relative humidity of 2 percent, and θ′ represents an initial contact angle of the ink with respect to plain paper after standing for one hour at 40° C. and relative humidity of 2 percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.