a method for producing packaging material in web form comprising a carcass layer having through holes , openings or slits , a barrier layer on one side of the carcass layer , a plastic lining arranged outside the barrier layer , and a laminant thermoplast arranged between the carcass layer and barrier layer . the method involves bringing the barrier layer at the same time as the carcass layer to adhere to the plastic lining and / or to the laminant thermoplast film in a press nip . the press nip comprises an impression roller exhibiting a jacket surface faced with an inner facing layer of elastic material possessing a first hardness and a first thickness , and an outer facing layer of elastic material possessing a second hardness and a second thickness . the first hardness is greater than the second hardness and the first thickness is greater than the second thickness .