This invention provides an inkjet ink comprising: an α,β-unsaturated ether monomer in which the only radiation-curable functional groups present in the monomer are α,β-unsaturated ether groups;a low- viscosity difunctional (meth)acrylate monomer in which the only radiation-curable functional groups present in the monomer are acrylate groups, wherein the low-viscosity difunctional (meth)acrylate monomer has a viscosity of 0.5 to 6.5 mPas at 25°C; and a colouring agent;wherein the ink contains less than 5% by weight of water and volatile organic solvents in total, and less than 10% by weight of mono-and difunctional monomers in total, other than the α,β-unsaturated ether monomer and the low-viscosity difunctional (meth)acrylate monomer, where the amounts by weight are based on the total weight of the ink, and wherein the ink has a viscosity of less than 30 mPas at 25º C.