Avecia Limited

Zeneca Limited

Aidan Joseph Lavery

Janette Watkinson

John Parker Meyers

Ronald W Kenyon

Prahalad Manibhai Mistry

Paul Wight

Mark Holbrook

Mark Robert James

Tom Annable

Mark Kenworthy

Kathryn Carr

John E Presgrave

Colin Dick Robertson

Paul Francis Mahon

Bachaspati Roy

Janet Gunn

Composition containing two different disazodyestuffs useful for ink jet recording

An ink-jet printing process comprising the steps (a) and (b) in any order or simultaneously: (a) applying by means of an ink jet printer an ink to a substrate in a localised manner to form an image on the substrate; and (b) applying to the substrate a composition comprising a binder and a polymeric biguanide which has a repeat unit of Formula (1) or a salt thereof: wherein X and Y are the same or different and represent divalent organic linking groups.

Ink-jet printing process using polymeric biguanides

Disazodyes for ink jet printing

The use of lithium as a cation for an anionic dye to enhance the light-fastness of the dye. Also claimed are the lithium salts of certain anionic dyes as defined in the description; mixed lithium/sodium salts of an anionic dye wherein the molar ratio of lithium to sodium is from 1:4 to 99:1 and at least 20 mole % of the total counter ions in the dye are lithium cations; inks containing the dyes; a method of ink jet printing using the inks; a substrate printed with the inks; an ink jet printer cartridge containing the ink and a ink jet printer containing the ink jet printer cartridge.

Use of lithium salts of anionic dyes to enhance their light-fastness

Ink composition

Ink additives

Disclosed are compositions useful in inks suitable for ink jet printing. The compositions comprising a black dye of specified formula and a dye of the formula (A) or salt thereof:

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High Wycombe, United Kingdom

Aidan Joseph Lavery