Printing system

A process for producing a coated, printed substrate comprising:

• (a) providing a printed substrate, wherein the substrate comprises a surface on which resides one or more areas of a layer of an ink, wherein the ink consists of
• (i) one or more olefin copolymers, and
• (ii) one or more appearance additive selected from one or more pigments, one or more dyes, and mixtures thereof, and
• (iii) one or more conductivity additives,
• (b) bringing together a component A and a component B to form a urethane coating composition,
• wherein component A comprises a polyisocyanate prepolymer A1, wherein the polyisocyanate prepolymer A1 is a reaction product of a polyisocyanate monomer Ala and an isocyanate-polyreactive compound A1b,
• wherein component B comprises one or more polyol B1,
• wherein the urethane coating composition has isocyanate index greater than 0.9, and
• (c) applying a layer of the urethane coating composition to the surface.