Suppose I have a pack of razor blades.
If they are to be stored for 10 years, does it matter whether they are stored in the sealed original packaging, or is it ok to remove them from the packaging?
How would them being opened, such that the thin sharp blades, are exposed to the atmosphere inside the home, the temperatures, humidity, etc. affect sharpness.
Which way, if either, would keep the blades as sharp today, as they would be in 10 years, and why.
Going beyond 10 years and using an example not related to razor blades, but rather an antique or vintage item.
Ex: World War I sharp knife that is exposed to the atmosphere for close to 100 years. Does the passing of time affect how sharp the blade is? (exclude outside forces, like rusting, or any contact with any substance that could affect the metal)