Silver is a precious metal and reacts with sulphur compounds in the air – it turns black when it tarnishes. This can even happen if the instrument is stored in a case for a long time. In the same way as for silver cutlery, treatment with silver polish also helps for instruments. But please ensure that you do not use too much polish in areas that are difficult to access so that no residue is deposited. We can make these parts shine again in our workshop.