MAGENTA COMPOUNDS AND INKS AND THEIR USE IN INK-JET PRINTING

摘要

A metal chelate compound obtainable from contacting a transition metal salt with a compound of the Formula (1): wherein: X represents plural atoms required to form at least one optionally substituted 5- to 7-membered heterocyclic ring; and Ar is an optionally substituted stilbene, acenaphthylene, phenanthrene or anthracene group carrying a hydroxy, amino or carboxy group adjacent to the -N=N- group shown in Formula (1) or 6-hydroxyquinoline where the hydroxy group is adjacent to the -N=N- group shown in Formula (1); provided that when the compound of Formula (1) is of Formula: that, p, the level of sulfonation, is not in the range 1 to 2. Also compositions, inks, printed substrates and ink-jet cartridges.