Copper sheets and strips go through a carefully controlled pre-oxidization and pre-patination process to immediately provide the same brown oxidized and green or blue patinated surface that would ...

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...

The hall’s copper-plated roof is now green from rust, but new evidence shows that the plates were originally painted black. Prefectural government officials said that when the Edo Period copper ...