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<p><big> Packaging materials </big></p>
<p>Flexible films are commonly used for products such as fresh produce, meats, fish and bread seeing as they provide suitable permeability for gases and <a href="page.php?w=water_vapor">water vapor</a> to reach the desired atmosphere. Pre-formed trays are formed and sent to the food packaging facility where they are filled. The package headspace then undergoes modification and sealing. Pre-formed trays are usually more flexible and allow for a broader range of sizes as opposed to <a href="page.php?w=thermoforming">thermoformed</a></p><p>
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