Ink set with expanded color gamut and process for using same

Details Ink set with expanded color gamut and process for using same Ink set with expanded color gamut and process for using same

2006-10-31

2006-10-31

Shah, Manish S. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

C347S095000, C106S031130, C106S031270

Reexamination Certificate

active

07128411

ABSTRACT:
A four-color ink set capable of printing an expanded color gamut has a cyan ink that prints on a reference substrate with CIELAB colorimetric aim values of L*=54, a*=−41, and b*=−45, within a ΔE*ab≦8; a magenta ink that prints on the reference substrate with CIELAB colorimetric aim values of L*=52, a*=79, and b*=−9, within a ΔE*ab≦8; a yellow ink that prints on the reference substrate with CIELAB colorimetric aim values of L*=90, a*=−7, and b*=102, within a ΔE*ab≦10; and a black ink. Obtaining a profile for the expanded gamut ink set, for example an International Color Consortium (ICC) profile, that relates tone values for the ink set to colorimetric values for the printed ink allows the printer to obtain the maximum benefit of the expanded color gamut. The profile for the ink set is applied in a color separation process prior to printing the image on press.

REFERENCES:
patent: 5656331 (1997-08-01), Kline
patent: 6610131 (2003-08-01), Harris et al.
patent: 6712449 (2004-03-01), Smith
patent: 2003/0116055 (2003-06-01), Kubota et al.
patent: 2003/0200887 (2003-10-01), Harris et al.
Mitsuo Kaji et al., “Colorimetric Characteristics of Process Color Prints Produced Under the Japan Color Conditions,” Recent Progress in Color Management and Communications, Online 1998, pp. 62-68, XP002306034, IST.
David McDowell, “Printing Aims,” IPA Bulletin Online 2002, pp. 40-44, XP002306035, IPA Standards Committee.

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