Lamination primers and inks for aqueous inkjet printing

A method for preparing digitally printed laminates via a single pass printing process, wherein the laminate comprises an aqueous coating composition and an aqueous pigmented inkjet printing ink, wherein said aqueous coating composition is applied to a substrate and said aqueous pigmented inkjet printing ink is printed onto the primed substrate, wherein the laminates have bond strengths in excess of 1.0 N/15 mm, as determined by a T-peel test, wherein said aqueous coating composition comprises:

• (a) a water-dispersible polymer and a multivalent metal salt, wherein the water-dispersible polymer is selected from the group consisting of non-ionic polyurethane dispersions, cationic polyurethane dispersions, non-ionic acrylic dispersions, cationic acrylic dispersions, amphoteric acrylic dispersions and combinations thereof;
• or
• (b) a water-soluble polymer selected from partially hydrolyzed poly (vinyl alcohol), copolymers containing vinyl alcohol and vinyl amine, poly (vinyl pyrrolidone), copolymers containing vinyl pyrrolidone and vinyl acetate, modified celluloses and water-soluble starches, wherein copolymers comprising vinyl alcohol and vinyl acetate comprise at least 5% vinyl acetate;
• a water-soluble aminated polymer comprising any blend of primary or secondary amines as part of its molecular structure;
• and a multivalent metal salt;
• and wherein said aqueous pigmented inkjet printing ink comprises an anionic polymeric dispersion or an anionic solution polymer.