Browse Prior Art Database

Dyes, inks and their use in ink jet printing

IP.com Disclosure Number: IPCOM000030463D
Publication Date: 2004-Aug-16
Document File: 2 page(s) / 10K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present disclosure relates to aqueous inks comprising a Blue, Orange, Violet or Green dye. These inks are especially suitable for the printing of various recording materials with the ink jet printing method.

This text was extracted from a Microsoft Word document.
This is the abbreviated version, containing approximately 53% of the total text.

Dyes, inks and their use in ink jet printing

The present disclosure relates to aqueous inks comprising a Blue, Orange, Violet or Green dye. The inks underlying the present disclosure are especially suitable for the printing of various recording materials (such as paper, film, cloth) with the ink jet printing method. By the ink jet printing method, images and characters are usually printed by subtractive color mixing of inks of four colors, namely Yellow (Y), Magenta (M), Cyan (C) and Black (K). Printed inks are subject to high demands in terms of their optical density, color brilliance and fastness to humidity, light and atmospheric pollutants. In order to widen color gamut and improve color reproduction of the formed image, supplementary color inks, such as Orange, Green, Blue or Violet, are increasingly implemented in addition to CMYK inks.

It has now been found that certain dyes enable to formulate effectively aqueous ink jet inks of the above mentioned colors. The obtained inks can markedly improve color reproduction when used in combination with a CMYK ink set or with a CMYK ink set already complemented with additional color inks, such as Light Cyan, Light Magenta or Red inks. The dyes in question are denoted by the following Color Index (C.I.) numbers: C.I. Direct Orange 102:1, C.I. Direct Blue 290, C.I. Direct Blue 281, C.I. Direct Violet 9, C.I. Direct Violet 35. Further suitable dyes include PERGASOL Violet F-R and LANASET Green B from Ciba Specialty Chemicals, Basel, Switzerland.

Inks according to this disclosure typically comprise:

(i)            from 0.5 to 10 parts of a dye as describ...