The results for the simulation of acid conditions, shown in Fig. 5, reveal that the release of silver increases over the course of storage for both types of packaging; slightly higher amounts of silver migration occurring in the case of coated films, particularly in the case of certain food types; e.g. orange juice, cheese and apples. The difference in migration could result not only from the higher acidity, but also due to increased viscosity or the presence of greater amounts of carbohydrates in the case of orange juice samples. However, in general, the results obtained for both types of packaging are indicative of low silver concentration and suggest that more research is required to identify whether these limits remain within the acceptable range to ensure consumer safety (Schmidt et al., 2009).