Lightfast ink-jet dye set having color gamut of silver halide prints

US6682589B2 · kind B2 · utility

Assignee

• HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. · US

Inventors

• Peter C. Morris · El Cajon, US
• Stephen W. Bauer · San Diego, US
• Shirley Lee · Poway, US
• Keshava A. Prasad · San Marcos, US
• Jeffrey H. Barr · San Diego, US

Key dates

• Filing date: Oct 30, 2001
• Grant date: Jan 27, 2004
• Expiry date: Mar 19, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D11/40
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A specific dye set for formulating yellow, cyan, magenta, and black inks comprises Direct Yellow 132, at least one other yellow dye, Direct Blue 199, a magenta dye comprising a dye having the structure and, optionally, Pacified Reactive Black 31, respectively. The dye set provides excellent ink-jet prints having excellent lightfastness when exposed to office light, excellent imaging onto glossy inkjet media, and large color gamut which substantially encompasses the color space for a silver halide reference print. The aqueous inks each comprise from about 0.1 to about 5 wt % of at least one dye with the black ink comprising from about 0.5 to about 5 wt % of at least one colorant; from about 5 to about 20 wt % of at least one organic solvent; 0 to about 1.5 wt % of at least one component independently selected from the group consisting of surfactants, buffers, biocides, and metal chelators; and the balance water.