How do restaurants keep lettuce crisp?

Online Answer
Lettuce actually needs a good amount of airflow, in addition to a bit of moisture, in order to stay crisp. That's why restaurants store their lettuce in special perforated bins that allow for air circulation while it's held in the fridge.
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When produce such as cabbage or romaine lettuce is packed in vented packages, it deteriorates more quickly. ... botulinum is unable to produce toxin in shredded cabbage and cut romaine lettuce when stored at 4.4 or 12.7°C for up to 28 days. Toxin production is possible only under conditions of extreme temperature abuse.Mar 6, 1995.
Lettuce will usually last for about 2 hours before going bad. After 2 hours, the leaves of the lettuce will start to go soft and wilt..
A new Consumer Reports test of 284 samples of fresh greens—such as lettuce, spinach, and kale—found six samples tainted with Listeria monocytogenes, a potentially deadly bacteria.
You can use any type of green leafy lettuce for lettuce wraps, but popular types of lettuce include Boston bib lettuce and romaine hearts. The great thing about lettuce wraps is that they are easily modifiable when it comes to the filling and the wrapping. Cabbage leaves would also be a yummy substitute.
A-The brown spots on lettuce may be cosmetically undesirable, but they do not make the lettuce unsafe to eat. The spots may be the result of a high storage temperature. Lettuce should be stored at a fairly low temperature in an airtight container. Stored this way, some lettuce can be kept for as long as three weeks.May 27, 1991.