Patent ID: 8409780

Claim:
A heat-sensitive negative-working lithographic printing plate precursor comprising: (a) a support having a hydrophilic surface or which is provided with a hydrophilic layer; and (b) an image-recording layer comprising hydrophobic thermoplastic polymer particles, an infrared light absorbing dye and an additional dye according to Formula I: wherein Q represents an optionally substituted mono-, tri- or penta-methine chain; Z and Z′ independently represent O, NR′, S or CH═CH wherein R′ is an optionally substituted alkyl or (hetero)aryl group; X and X′ independently represent hydrogen, halogen, O—CH 3 , an optionally substituted alkyl or (hetero)aryl group, or a condensed benzene ring; L and L′ represent a linking group; and G and G′ represent an acid group or salt thereof; and wherein the additional dye according to Formula I has a most bathochromic light absorption peak at a wavelength between 451 and 750 nm.