Method for lacquering substrates, and lacquered substrates

A method of producing a printed product comprising the steps of:

• a) providing a print substrate, wherein the print substrate comprises a paper or paperboard, wherein a particulate coating comprising inorganic fillers in an organic binder is applied as a slip on at least one surface of the paper or paperboard,
• b) applying a formulation for production of a first layer as a sealing layer to at least one surface of the substrate, wherein the formulation for production of the first layer is applied on a top of the particulate coating, and wherein the formulation for production of the first layer comprises at least one monomer, oligomer or prepolymer having at least one crosslinkable functional group and the formulation for production of the first layer comprises coating materials from the group having the elements of isocyanate-crosslinking systems, polyurethanes, epoxy systems, acrylates, methacrylate, polyvinylethers, polyesters based on maleic acid and fumaric acid, styrene compounds and silicone acrylates,
• c) curing the first layer applied in step b), wherein the cured first layer has a layer thickness in the range from 1 to 10 μm, and
• d) applying a second layer to the surface of the first layer created in step c), wherein the second layer applied in step d) has a complete surface in printed regions.