Please note: Carbon steel.

Rust never sleeps: under no circumstances should carbon steel knives be put in the dishwasher - this would make them rust quickly and ruin the exquisite cherry wood handles. The steel will discolour for a short while upon being subjected to foodstuffs with high acid contents (citrus fruits, apples, fish), and these may assume a mildly metallic taste. However, this reaction is neither a concern for the stability of the knives nor for the health of those eating the food. Carbon steel knives require, and deserve, careful handling. To remove rust particles from your blades the Herder rust easer is the ideal solution. Simply rub it along the dry blade and the rust will diappear instantly. Exactly how this is done, we cannot say since Herder keep the material formula secret.