Abstract: A water-soluble dye of the Formula (1): D1-L-D2 ??Formula (1) wherein D1 and D2 each independently is an anthrapyridone, anthrapyrazole, anthrapyrimidine or anthrapyrimidone group; and L is a single covalent bond or a linking group which permits at least partial delocalisation of electrons between D1 and D2, compositions and inks containing the dye, and printing processes, printed material and ink-jet printer cartridges based on use of the dye.

Abstract: A water-soluble dye of the Formula (1): D1-L-D2 ??Formula (1) wherein: D1 and D2 each independently is an anthrapyridone, anthrapyrazole, anthrapyrimidine or anthrapyrimidone group; and L is a single covalent bond or a linking group which permits at least partial delocalisation of electrons between D1 and D2. Also, compositions and inks, printing processes, printed material and ink-jet printer cartridges.

Abstract: A metal chelate compound of Formula (1) or a salt thereof: [A-N?N—B]M??Formula (1) wherein: A is an optionally substituted pyridyl ring; and B is of the Formula (2): wherein: X and W are substituents other than H; M is a metal chelated to A-N?N—B; and n is 0 to 4, also claimed are compositions and inks containing a compound of Formula (1), a process for ink jet printing using the inks and an ink jet printer cartridge containing the ink.

Abstract: A metal chelate compound of Formula (1) or a salt thereof: [A-N=N—B] M ??Formula (1) wherein: A is an optionally substituted pyridyl ring; and B is of the Formula (2): wherein: X and W are substituents other than H; M is a metal chelated to A-N=N—B; and n is 0 to 4, also claimed are compositions and inks containing a compound of Formula (1), a process for ink jet printing using the inks and an ink jet printer cartridge containing the ink.

Abstract: An ink comprising water, a water-dissipatable polymer and one or more dyes of Formula (1): wherein: R1 is H or a substituent; R2 and R3 are each independently optionally substituted alkyl, aryl or aralkyl, or R2 and R3 together with the carbon atom to which they are attached form an optionally substituted ring; R4 is H or optionally substituted alkyl, aryl or aralkyl; and D is an optionally substituted arylene group. Also claimed are the dyes of Formula (1), ink jet printing processes and cartridges containing the inks.

Abstract: Compounds and ink compositions. An ink composition comprising a compound of Formula (1) and salts thereof: ##STR1## wherein Ch represents an arrangement of atoms which causes the compound to absorb electromagnetic radiation;R.sup.a and R.sup.b each independently is a spacer group;Y is an interactive functional group;w and x each independently is 0 or an integer equal to or greater than 1; andm and n each independently is an integer equal to or greater than 1, provided that w and x are not both equal to zero and when one of w or x is 0 at least one of m and n is equal to or greater than 2. For use in ink jet printing and electrophotography.

Abstract: A thermal transfer sheet comprising a substrate having a coating comprising a dye which carries an ##STR1## wherein R.sup.1 is an optionally substituted branched chain alkyl group; andR.sup.2 is an optionally substituted alkyl group or an optionally substituted aryl group provided that the dye is not a monoazo dye or that the dye is not 3-(2,3-dihydroindol-1-yl)-2-?4-(isopropylpropylamino)-2-methylphenylimino! -3-oxo-N-(2,4,5-trichlorophenyl)propionamide.