Patent ID: 7282164
Filing Date: 2007-10-16
Classification: G06F,G06K,G06Q,H04N

Abstract:
1. A stabilized ink composition comprising an IR-absorbing metal-ditholene dye and a singlet oxygen quencher, wherein the metal-dithiolene dye is of formula (II): wherein: M is selected from Ni, Pd or Pt; j is selected from 0, 1, 2, 3 or 4; k is selected from 0, 1, 2, 3 or 4; n is selected from 0, 1, 2 or 3; W is a hydrophilic group selected from the group comprising: a substituent comprising an ammonium group; a substituent comprising an acid group, including salts thereof; and a substituent comprising a sulfonamide group; up to three —(CH up to three —CH— groups in the carbocycle may be optionally replaced by —N—; up to four H atoms in the carbocycle may be optionally replaced by a group independently selected from C provided that at least one of j or k is greater than 0.