... as aging or can be said in photooxidation of cellulose occurred in the substrate (Schaeffer 2001, p. 56). These types of papers and paper-based collections were made from mechanical wood pulp and other ingredients that tend to compromise the intrinsic stability of cellulose due to a high amount of lignin remain in the pulp. Because lignin rejects water and resists bonding, it is often undesirable, ... to paper and paper-based collections. Discoloration Unlike the uniformly white color of a new sheet, aging or photochemical degradation usually leads to an overall yellowing from the reacti...

• Word Count: 1805
• Approx Pages: 7
• Has Bibliography
• Grade Level: Undergraduate