Three different cutting methods were used.
Cutting lettuce with ceramic knife.
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.
The instructions were to cut out the heart of the lettuce head insert a.
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.
Cook s illustrated put this claim to the test by conducting an experiment.
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.
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.
Plastic knives are non reactive as well.
Many cookbooks still carry the statement that a knife may bruise the leaves this myth seems to have been b.
Norpro green lettuce knife 1 pack.
Though all lettuce began showing some browning on the ribs after 10 days none showed any signs of browning on the cut or torn surfaces.
The knife also should be durable enough to stand up to regular use.
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Lettuce was cut by a plastic knife a stainless steel knife and by hand.
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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Back in the 1970s the company came out with a little plastic knife or corer that it included with its lettuce crisper.
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.
For a long time i simply assumed that a lettuce knife is made out of plastic for safety.