Lithographic printing plate precursor

A lithographic printing plate precursor including on a support a coating comprising a photopolymerisable layer including a polymerisable compound, a photoinitiator, and an infrared absorbing dye of Formula I:

• wherein
• Z and Z′ each independently represent —S—, —CRaRb—, or —CH═CH—, wherein Ra and Rb each independently represent an alkyl, aralkyl, or aryl group;
• A represents a halogen, an optionally substituted aliphatic hydrocarbon group, an optionally substituted (hetero) aryl group, or —NR1R2, wherein R1 and R2 each independently represent hydrogen, an optionally substituted aliphatic hydrocarbon group, an optionally substituted (hetero) aryl group, or combinations thereof;
• Q represents the necessary atoms to form a ring;
• T and T′ each independently represent hydrogen, alkyl, halogen, alkoxy, cyano, —CO2Rn, —CONRkRm, —SO2Rn, —SO2NRoRp, or an optionally substituted annulated benzene ring, wherein Rk and Rm each independently represent hydrogen or an optionally substituted alkyl or aryl group, Rn represents an optionally substituted alkyl or aryl group, and Ro and Rp each independently represent hydrogen or an optionally substituted alkyl or aryl group;
• W− represents a counterion in order to obtain an electrically neutral compound;
• and
• Rz and Rz′ each independently represent an optionally substituted alkyl group, characterized in that Rz and Rz′ are different.