I want to distinguish between preserving and protecting the card. The card will be put in a safety deposit box so protecting is not a huge concern. Most important is preventing the card stock from deteriorating. The card I want to preserve is from 2007.
I have read the best way to preserve something made of paper is using Mylar/polyester sleeve. The Library of Congress uses Mylar to protect paper documents.
Another option is a PSA holder. Does anyone know if a PSA holder preserve a card better than a polyester sleeve?
Does anyone have any Mylar trading card sleeves I can buy? I don't believe they are made any more.
http://www.the2buds.com/sumytrcd.htm