Paper products are widely used in archival material, literature, artifacts, pictures, stamps, photos and various important bills, filter paper, such as paper strip. Wooden products, silk products, leather products widely used in all aspects of life and works of art and antiques. They contain a great amount of cellulose, Moisturized mold can be regarded as glycogen and thus vulnerable to fungal attack. Chemical test paper also by the ingredients change and lead to the normal instructions. Be stored in 40% relative humidity environment to ensure safety.