Digital printing of polymer-coated paper or board

The invention relates to a method for digitally printing a polymer-coated paper or board ( 1 ), to a paper or board suitable for the method and to the production of a product package equipped with digital prints. During digital printing, printing ink particles are applied in an electric field to the printing surface formed of a polymer coating at locations corresponding to the print, and the printing ink is adhered to the printing surface by fusion with the aid of infrared radiation.; In accordance with the invention, the paper or board ( 2 ) to be printed is equipped with an inner coating layer ( 3 ) containing electrically chargeable ethene acrylate copolymer, such as ethene methyl acrylate copolymer (EMA), and with a polyolefin-based outer shield layer ( 4 ) on top of this, which contains e.g. low-density polyethene (LDPE) and provides mechanical strength, forming the printing surface receiving the printing ink.