Acid-free paper is a type of paper that is manufactured without the use of acids, making it more durable and less prone to deterioration over time. This quality helps prevent yellowing and brittleness, which are common issues with regular paper. Acid-free paper is often used for important documents, archival materials, and artwork to ensure longevity. The pH level of acid-free paper is typically neutral or slightly alkaline, which contributes to its stability. Many artists and historians prefer using acid-free paper for drawings, photographs, and books to preserve their work and maintain its quality for future generations.