Comic books require constant protection. They fade and disintegrate when exposed to sunlight. If you throw raw comic books into a long box, they will fade and disintegrate over time naturally. That is why products like the best comic book sleeves and boards were created.
Comic books are made from paper. Wood-pulped paper contains lignin. Lignin is an organic substance that causes paper to slowly disintegrate. When paper products experience exposure to the elements, like oxygen, sunlight, heat, or humidity, lignin causes the paper to discolor, become brittle, and disintegrate over time.
