A protective coating of colloidal silver is painted on the inside and outside of the filter to kill bacteria.
VOA: special.2009.06.22
Its mirror-finish black steel skin reflects every passing cloud, giving the building a mysterious totemlike quality, while inside unfinished ceilings are painted deep blue and almost every space can be used flexibly, whether for exhibiting, performances or local events.
Told from here, from this hard bench that is both bed and chair, table and couch, inside walls and bars painted a dark gray like a grim parody of jail, the story has a different ring than it would if I could tell it from the desk in my office.