- Before using the knife for the first time, it must be washed thoroughly under running water and with plenty of washing-up liquid. - The FK2 is a hand-forged knife made of carbon steel and therefore not rustproof! - The blade (especially the polished edge) gets a patina with use and becomes dark gray over time. So please don't worry, especially at the beginning, if the blade discolours - that's not a mistake! The manufacturing process of your FK2 knife is only really complete when the patina is"finished"after frequent use. - Wash the knife with water and washing-up liquid after the work is done, do not put it in the dishwasher. Store it as dry as possible. A drop of oil also cares for the blade and the handle wonderfully and preserves it until the next use. - Oil the handle regularly to prevent the handle from"shrinking". If the fit is already a bit loose, put a drop of oil on it as well.