From the gas phase the contaminants permeated through the functional barrier into the
food. This permeation process has a kinetic part that can be described by the diffusion of a contaminant and a thermodynamic
sorption/desorption part that can be described e.g. by the solubility of a contaminant in a packaging material or food. The gas phase
migration process requires an evaporation of the mineral oil components with subsequent re-condensation onto packaging
materials or food.