A short while ago, I invested in a roll of the best quality adjustable fold mylar jacket protectors and began applying them to my favorite and/or most valuable books from my collection. What struck me was just how thick they were (robust polyester sheeting with paper backing). Even before I read this short piece from a Colorado Antiquarian Book Seminar attendee, I had concerns that, in the interest of preventing chips, tears, and overall shelfwear, I was actually malforming my jackets. It is curious that the biggest name in protectors, Brodart, applies paper backing to all of their archival safe covers, save one, their cheapest offering--the Econo-fold.
Now I'm not quite sure how I want to proceed. What do the long time collectors among my readers think? Please share.