A liquid radiation curable composition for inkjet printing comprising a photoinitiating system consisting of one or more photoinitiators selected from the group consisting of non-polymeric di- or multifunctional initiators, oligomeric or polymeric initiators and polymerizable initiators and one or more polymerizable co-initiators wherein at least one of said polymerizable co-initiators is a co-initiator according to Formula: wherein, R 1 and R 2 are independently selected from the group consisting of an alkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an alkaryl group, an aryl group and a heteroaryl group; R 3 to R 6 are independently selected from the group consisting of hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an acyl group, a thioalkyl group, an alkoxy group, a halogen, an aralkyl group, an alkaryl group, an aryl group and a heteroaryl group; R 7 is selected from the group consisting of hydrogen, an aldehyde group, a ketone group, an ester group, an amide group, an acyl group, a thioalkyl group, an alkoxy group, a halogen, a nitrile group, a sulphonate group, a sulphonamide group, an alkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an alkaryl group, an aryl group and a heteroaryl group; R 1 and R 2, R 1 and R 3, R 2 and R 5, R 3 and R 4, R 4 and R 7, R 5 and R 6, and R 6 and R 7 may represent the necessary atoms to form a 5 to 8 membered ring; and with the proviso that the aromatic amine has at least one alfa hydrogen; and at least one of R 1 to R 7 comprises a polymerizable ethylenically unsatured functional group selected from the group consisting of acrylate, substituted acrylate, methacrylate, styrene, acrylamide, methacrylamide, allyl ester, allyl ether, vinyl ester, vinyl ether, fumarate, maleate, maleimide and vinyl nitrile characterised in that the liquid radiation curable composition includes a pigment and a polymerizable photoinitiator. R 1 and R 2 are independently selected from the group consisting of an alkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an alkaryl group, an aryl group and a heteroaryl group; R 3 to R 6 are independently selected from the group consisting of hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an acyl group, a thioalkyl group, an alkoxy group, a halogen, an aralkyl group, an alkaryl group, an aryl group and a heteroaryl group; R 7 is selected from the group consisting of hydrogen, an aldehyde group, a ketone group, an ester group, an amide group, an acyl group, a thioalkyl group, an alkoxy group, a halogen, a nitrile group, a sulphonate group, a sulphonamide group, an alkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an alkaryl group, an aryl group and a heteroaryl group; R 1 and R 2, R 1 and R 3, R 2 and R 5, R 3 and R 4, R 4 and R 7, R 5 and R 6, and R 6 and R 7 may represent the necessary atoms to form a 5 to 8 membered ring; and with the proviso that the aromatic amine has at least one alfa hydrogen; and at least one of R 1 to R 7 comprises a polymerizable ethylenically unsatured functional group selected from the group consisting of acrylate, substituted acrylate, methacrylate, styrene, acrylamide, methacrylamide, allyl ester, allyl ether, vinyl ester, vinyl ether, fumarate, maleate, maleimide and vinyl nitrile characterised in that the liquid radiation curable composition includes a pigment and a polymerizable photoinitiator.