If you have a specific medal in mind, tell me its , approximate age , and where it is currently stored . I can give you a more tailored care plan. Share public link
Store your collection in a climate-controlled room. Aim for a stable relative humidity for base metals, and keep temperatures steady around 65°F to 70°F (18°C to 21°C) . Use silica gel packets in storage containers to absorb ambient moisture. Use Archival-Safe Materials medal crack