Patent ID: 7160664
Filing Date: 2007-01-09
Classification: B41M,C09B,G03C

Abstract:
1. A magenta dye combination comprising at least a first magenta dye of the following structure I: wherein X is a NR 3 R 4 group or a hydroxyl group, wherein R 3 and R 4 may be same or different and are independently selected from an alkyl, alkenyl, aryl, aralkyl, or cycloalkyl group; Y 1 and Y 2 each independently are selected from a carbon atom or a nitrogen atom, provided that one of Y 1 and Y 2 is a nitrogen atom; Z is an atomic group necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring which may be condensed with another ring; and R 1 and R 2 are each independently selected from a hydrogen atom, halogen atom, alkyl, alkenyl, alkoxy, alkylamino, acetamido, sulfonamide, aryl, aralkyl, or cycloalkyl group; and a second magenta dye of the structure II: wherein: R R R R Z represents hydrogen or the atoms necessary to complete a 5- or 6-membered ring.