If you are not familiar with Intercept Technology, pls check out our website; http://www.coinarmour.com Intercept is used for the preservation of silver, gold, copper, and bronze coins. It utilizes technology for the prevention of corrosion of coins. The Intercept lining of the bag neutralizes gases in the air which can cause coins to spot, discolor, and tarnish. Our bags are specifically designed to hold PCGS or NGC slabs. If you want a free sample, pls send me an email thru the website. Email is after the research papers. http://www.coinarmour.com/Research_Contact_Us.php Or you can simply browse our store. http://shop.coinarmour.com/ thanks, Chris
