Do Unused Knives Get Dull?

The atoms will tend to migrate away from that organized edge. This is a very slow process. So, these two things mean that the answer to your question, "Do unused knives get dull?" is yes. Oxidation Logically this makes the most sence.

What causes a knife to become dull?

The steel the knife is made from is far harder than anything you would normally cut; therefore the dulling effect on the cutting edge of the knife is very low. The harder the material a knife comes in contact with the faster it will dull. Avoiding contact with hard materials is the key to preventing premature dulling.

Is it OK to use a dull knife?

A dull blade is actually more dangerous to use than one that is sharp. Here's why: A dull blade requires more pressure to cut, increasing the chance that the knife will slip with great force behind it. A sharp knife "bites" the surface more readily.