3M’s anti-tarnish tabs help to protect the following metals: silver, nickel, copper, bronze, brass, pewter and plated metals. These are great not only for finished metal items, but also placed in bags of beads that may tarnish over time, such as silver-lined, silver- and copper-plated and galvanized.
The tabs work by absorbing moisture, which causes tarnish. Their potency lasts for 6 to 12 months, depending on how often they are exposed to air. For best results, the item to be protected should be in a reasonably airtight container (the more airtight, the better), such as a zip plastic bag, jewellery box, silverware chest or similar type of storage. Just put a tab in with your item. More than one tab may be needed for jewellery boxes and larger storage.
Bag of 20 (2.5cm x 2.5 cm) tabs. Tabs are non-toxic and should be stored in an airtight container. Can also be used for silver cutlery, trophies in display cases, musical instruments and so on.