A slight discolouring of the blade is entirely normal and does not impair the knife's utility in any way. On the contrary, it gives the knife its individual character.

The complex manufacturing process guarantees the outstanding quality of Nesmuk knives when they are delivered to the customer. However, the long-term quality of a knife depends on how well you handle it. If you use your knife for its intended purpose and treat it with respect, it will continue to function perfectly for many years.