Packaging cut lettuce and other fresh produce in semipermeable plastic films extends shelf life via a technique called "modified-atmosphere packaging". Romaine and "crisphead" (such as iceberg ...

Packaging cut lettuce and other fresh produce in semipermeable plastic films extends shelf life via a technique called "modified-atmosphere packaging". The success of modified-atmosphere (MA ...

The process, called "modified atmosphere packaging," is done naturally using ... Many food contamination scares come from pre-cut bagged lettuce. Torn leaves are more likely to contain bacteria ...

Lettuce definitely does give off gas after it's bagged, but it's also put into a plastic bag designed to modify the atmosphere within it. That packaging is aptly called modified atmosphere ...