Abstract:
A printing apparatus for printing on a substrate comprises a first support to support a substrate support, and a second support that supports a print head, a ultraviolet (UV) source of UV radiation, and a gas dispenser. The second support is moveable relative to a substrate supported by the first support. The print head deposits printing fluid on the substrate and the UV source cures the deposited printing fluid. The gas dispenser is arranged to provide a layer of gas, which is at least depleted of oxygen, between the UV source and the substrate.