Abstract: A laminated packaging material is provided. The laminated packaging material comprises a bulk layer of paper or paperboard or other cellulose-based material comprising a plurality of longitudinally distributed holes extending through the bulk layer, one or more outside layers being laminated to the bulk layer, one or more inside layers being laminated to the bulk layer, wherein said inside and outside layers covering said holes on the bulk layer and so form the plurality of longitudinally distributed laminated holes, and a plurality of longitudinally distributed primary holes extending through the entire thickness of the of the associated laminated hole and wherein the each primary hole is surrounded by the edges of the laminated hole.

Abstract: An open dynamic flux chamber (10) comprising: a cylindrical box-like body having a bottom opening designed to be rested on an emitting surface; an inlet (15) for a vector gas, positioned on said box-like body; a hole (16) for taking measurements, positioned on said box-like body; at least one vent hole (17) positioned on said box like body to place the mixture of gas present in said box like body in contact with the outside environment; characterized in that said flux chamber (10) has an flat upper base (1) and comprises a tubular shaped windbreak (40) positioned above said upper base (11) to protect said at least one vent hole (17) and having a length greater than 30 cm and a width greater than 5 cm.