Various aqueous coating formulations are described. The compositions include one or more UV curable polyurethane dispersions, and optionally one or more of the following: non-UV curable acrylic polymers, a polyester dispersion, a non-UV curable polyurethane dispersion, and one or more additives. The compositions can be used to form top coats that exhibit good resistance to scratches and solvents, and improved ink adhesion and image quality.