Period 5 element other metal is not easily oxidized in air and is used to coat other metals to prevent corrosion. The firstalloy, used in large scale since 3000 BC, was bronze, an alloy of tin and copper. After 600 BC pure metallic tin was produced. Pewter, which is an alloy of 85–90% tin with the remainder commonly consisting of copper, antimony and lead, was used for tableware from the Bronze Age until the 20th century. In modern times tin is used in many alloys, most notably tin/lead soft solders, typically containing 60% or more of tin. Another large application for tin is
Main Administration for Affairs of Prisoners of War and Internees was that GUPVI was a major source of recruitment of future communist activists for communist states, such as GDR and People's Republic of Poland, as well as various "democratic committees" of Japanese, Austrians, etc. Significant efforts were channelled into " ideological reforging" ("идеологическая перековка") of the laborers, and numerous clubs, libraries, local radio stations were created. In total, during the whole period of the existence of GUPVI there were over 500 POW camps (within the Soviet Union and abroad) which imprisoned over 4,000,000 POW. Main Administration for Affairs of Prisoners of War and Internees The Main Administration for Affairs of