Back in the 1970s the company came out with a little plastic knife or corer that it included with its lettuce crisper.
Cutting lettuce with ceramic knife.
Cook s illustrated put this claim to the test by conducting an experiment.
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For a long time i simply assumed that a lettuce knife is made out of plastic for safety.
Many cookbooks still carry the statement that a knife may bruise the leaves this myth seems to have been b.
Two weeks later the torn lettuce was the last to brown on its edges compared to the 12 days until browning for the heads cut with the metal knives and the 13 days until browning cut with the.
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However a few week ago i read a post on chowhound that a lettuce knife is made out of plastic in order to reduce the lettuce from oxidizing and browning.
A lettuce knife is a kitchen knife that is usually molded from nylon or another synthetic material to help cut lettuce stay fresh longer than it would if it were cut with a regular knife blade.
The instructions were to cut out the heart of the lettuce head insert a.
Plastic knives are non reactive as well.
After 12 days the heads cut with metal knives showed faint signs of browning on these surfaces and the lettuce cut with the plastic knife followed a day later.
Sharp enough for lettuce but gentle enough not to cut our hands.
When evaluating lettuce knives consumers should first look for products with blades long enough to accommodate the size of their produce.
Onupgo plastic kitchen knife set with serrated cutting edges kids safe chef nylon knife children s cooking knives for fruit bread cake lettuce and salad green 4 6 out of 5 stars 270 3 99 3.
Three different cutting methods were used.
Norpro green lettuce knife 1 pack.
The knife also should be durable enough to stand up to regular use.
The frequent admonishment to never cut lettuce with a knife lest the cut edges turn brown faster than hand torn lettuce leaves is a myth.