A free radical radiation curable inkjet ink having a viscosity smaller than 30 mPa·s at 40° C. and at a shear rate of 1,000 s−1 includes a polymeric or polymerizable photoinitiator; a thiol compound; and a vitrification control monomer. The vitrification control monomer includes a (meth)acrylate group and an ethylenically unsaturated functional group selected from the group consisting of a vinyl ether group, an allyl ether group, and an allyl ester group, and the thiol compound includes no more than six thiol groups.