Superior components of paper fibers contain greater amounts of cellulose and minimal lignin. Paper is formed by the chemical bonding of fibers. Cellulose has two characteristics which make this bonding possible. Cellulose is hydrophilic, which means it has a great affinity for water. Hydrogen bonding occurs between cellulose chains, which forms sheets of fibers when brought together in close proximity.
Acidic paper can be the result of acids in the coponents of paper or atmospheric conditions.
A pH of 7.0 is neutral. A pH of less than 7.0 is acidic. A pH of greater than 7.0 is alkaline. An acid is any substance that can donate a proton. Acids attack bonds that hold glucose rings, cellulose chains, microfibrils, bundles, and fibers together in paper.