Microchamber Interleaving Paper is very thin, nearly transparent and contains proprietary SPZ zeolite which gives it the power to absorb acid from paper. This paper is a thin, pure white exceptionally uniform 100% cotton paper. It is approximately one half the thickness of a sheet of bond paper. It can be used with all collections whether paper based or photographic items are involved. Comic book paper is made from tree pulp. A tree's cellulose material, LIGNIN, turns the paper into ACID over time. Most people know that a bag will help protect a comic but don't know why. Exposure to open air greatly accelerates acid decomposition, but even with the best bags money can buy (mylars), your comics will still turn yellow then brown and eventually crumble into tiny brittle shards that disintegrate into the wind. It's a tragic love story. Acid loves your comics so much that it destroys them so no one else can have them. You can prolong the life and current condition of your comics by absorbing acid and and prevent acid migration by using Microchamber Paper. Place one sheet between the first page and front cover, one sheet between the back cover and last page and one sheet in the middle of the book.