Water-based ink, ink tank having the same, and ink-jet...

Details Water-based ink, ink tank having the same, and ink-jet... Water-based ink, ink tank having the same, and ink-jet...

2007-10-30

2007-10-30

Klemanski, Helene (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031510, C106S031520, C347S100000

Reexamination Certificate

active

11006625

ABSTRACT:
A water-based ink containing a water-soluble dimer coloring material having a molecular structure having two chromophores and being symmetrical via a decomposable linking group, a water-soluble monomer coloring material having the same structure as the molecular structure obtained by the decomposition of the linking group in the water-soluble dimer coloring material, and a first water-soluble organic solvent which is a triol compound being liquid at normal temperature and having less than 5 carbon atoms, capable of restraining the water-soluble dimer coloring material from being decomposed. The water-soluble monomer coloring material is from 1% or more to 12% or less in weight with respect to the weight of the water-soluble dimer coloring material. Also disclosed are an ink tank holding therein this ink, and an ink-jet recording process carried out using this ink.

REFERENCES:
patent: 5482545 (1996-01-01), Aoki et al.
patent: 2003/0070580 (2003-04-01), Blease et al.
patent: 2003/0095169 (2003-05-01), Ito et al.
patent: 2004/0080597 (2004-04-01), Yakushigawa et al.
patent: 2005/0087100 (2005-04-01), Blease et al.
patent: 2005/0115458 (2005-06-01), Oki et al.
patent: 2522325 (1996-05-01), None

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