A method of manufacturing decorative panels comprising the steps of: - selecting a paper with a paper weight between 50 g/m 2 and 130 g/m 2 and a porosity according to Gurley's method (DIN 53120) between 8 and 20 seconds; and - selecting a wood pattern (W 1..M, 1..N); and - generating a selection mask (M 1..M, 1..N), representing one or more wood nerves; one or more wood pores and/or one or more wood imperfections from said wood pattern (W 1..M, 1..N), by image-analysing said wood pattern (W 1..M, 1..N); and - supplying said wood pattern (W 1..M, 1..N) and said selection mask (M 1..M, 1..N) to an inkjet print head unit for forming a decorative layer; - impregnating said decorative layer with a thermosetting resin; and - heatpressing said impregnated decorative layer together with a core layer for forming a decorative panel; and wherein said inkjet print head unit comprises a plurality of nozzles for jetting a pigmented aqueous inkjet ink; and characterised in further comprising the steps of - determining a set of nozzles from said plurality of nozzles based on inactivity of a nozzle by calculating inactivity-duration for said nozzles and by comparing the calculated inactivity-duration to a threshold value (T 1); and wherein said decorative layer is formed by: - jetting droplets from said pigmented aqueous inkjet ink on said paper by said plurality of nozzles for forming said wood pattern; and - jetting droplets from said pigmented aqueous inkjet ink on said paper for preventing clogging of said determined set of nozzles by forming a part of or whole said selection mask (M 1..M, 1..N) with said determined set of nozzles. - selecting a paper with a paper weight between 50 g/m 2 and 130 g/m 2 and a porosity according to Gurley's method (DIN 53120) between 8 and 20 seconds; and - selecting a wood pattern (W 1..M, 1..N); and - generating a selection mask (M 1..M, 1..N), representing one or more wood nerves; one or more wood pores and/or one or more wood imperfections from said wood pattern (W 1..M, 1..N), by image-analysing said wood pattern (W 1..M, 1..N); and - supplying said wood pattern (W 1..M, 1..N) and said selection mask (M 1..M, 1..N) to an inkjet print head unit for forming a decorative layer; - impregnating said decorative layer with a thermosetting resin; and - heatpressing said impregnated decorative layer together with a core layer for forming a decorative panel; and wherein said inkjet print head unit comprises a plurality of nozzles for jetting a pigmented aqueous inkjet ink; and characterised in further comprising the steps of - determining a set of nozzles from said plurality of nozzles based on inactivity of a nozzle by calculating inactivity-duration for said nozzles and by comparing the calculated inactivity-duration to a threshold value (T 1); and wherein said decorative layer is formed by: - jetting droplets from said pigmented aqueous inkjet ink on said paper by said plurality of nozzles for forming said wood pattern; and - jetting droplets from said pigmented aqueous inkjet ink on said paper for preventing clogging of said determined set of nozzles by forming a part of or whole said selection mask (M 1..M, 1..N) with said determined set of nozzles. wherein said inkjet print head unit comprises a plurality of nozzles for jetting a pigmented aqueous inkjet ink; and characterised in further comprising the steps of - determining a set of nozzles from said plurality of nozzles based on inactivity of a nozzle by calculating inactivity-duration for said nozzles and by comparing the calculated inactivity-duration to a threshold value (T 1); and - determining a set of nozzles from said plurality of nozzles based on inactivity of a nozzle by calculating inactivity-duration for said nozzles and by comparing the calculated inactivity-duration to a threshold value (T 1); and wherein said decorative layer is formed by: - jetting droplets from said pigmented aqueous inkjet ink on said paper by said plurality of nozzles for forming said wood pattern; and - jetting droplets from said pigmented aqueous inkjet ink on said paper for preventing clogging of said determined set of nozzles by forming a part of or whole said selection mask (M 1..M, 1..N) with said determined set of nozzles. - jetting droplets from said pigmented aqueous inkjet ink on said paper by said plurality of nozzles for forming said wood pattern; and - jetting droplets from said pigmented aqueous inkjet ink on said paper for preventing clogging of said determined set of nozzles by forming a part of or whole said selection mask (M 1..M, 1..N) with said determined set of nozzles.