On: Cooking with black plastic is particularly crucial...

[moe_sc]

What else is? Certainly neither glass nor metal, since they dull knives way to fast.

[dotancohen → moe_sc]

The lignin in wood is also extremely effective at dulling knives.

[kazinator → dotancohen]

The cutting bits of woodworking tools pass through more wood in a minute than a knife does over its entire lifetime.