|15.4.1 Demands made of packaging|
|The packaging used for highly perishable foodstuffs has to provide protection against external influences, such as atmospheric oxygen, water vapor, light, microbial attack, foreign odor, dust and contamination.
The packaging materials must not react with the goods (foodstuffs). The packaging must be readily stackable, resistant to compression, impact and breakage as well as providing protection against moisture, i.e. the cartons must be made from wet strength paperboard since moisture will otherwise make them bulge, especially in the lower layers (see Fig. 101).
Packaging also plays an ever greater promotional role, since chilled products are provided with attractive sales packaging, in which they are also transported. See-through packaging allows the purchaser to assess the contents to a certain degree. For example, the purchaser will be disturbed by drops of condensation water visible on the inside of the packaging. The current trend is towards transporting goods in the retail portions (foodtrays (small packages)) in which they will be offered for sale to the customer on the retailer's shelves.
Packaging must additionally be environmentally friendly and recyclable: packaging used for highly perishable goods cannot generally be reused for reasons of hygiene.
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