laminate comprises as is apparent from fig3 and seen from the side which is intended to constitute the outside of a finished package a sealing layer 1 of for example pe an integrated information and core layer 2 of mineral filled thermoplastic with admixed magnetisable particles as well as an inner sealing layer 5 of for example pe this packaging laminate is adapted for refrigerated distribution the integrated core layer 2 is preferably of the same type as was described in connection with the first embodiment i e a mineral filled polyolefin layer as is apparent from fig4 the packaging laminate comprises according to a fourth embodiment the same layers as in the third embodiment as well as a lamination layer 6 of for example pe and a barrier layer 7 of for example aluminium foil between the core layer 2 and the innermost sealing layer 5 the lamination layer 6 is located between the barrier layer 7 and the core layer 2 this packaging laminate is adapted for non refrigerated distribution examples of metallic materials which may be employed for the magnetisable particles are chromium oxide iron oxide titanium manganese or mixtures thereof according to one example use is made of substantially spherical particles having a diameter of approximately 0 5 u03bcm experiments have proved that but limited quantities of magnetisable particles are needed it has also proved that the requisite admixing degree reduces with the thickness of the particle.