Yep. Metallic ink is used in your green(/blue/red)backs. http://www.dailymail.co.uk/news/article-2120883/A-step-spyware-Metal-detectors-tell-cash-pocket.html ht

Yep. Metallic ink is used in your green(/blue/red)backs. http://www.dailymail.co.uk/news/article-2120883/A-step-spyware-Metal-detectors-tell-cash-pocket.html http://www.dailymail.co.uk/news/article-2120883/A-step-spywa...