Books are made of different materials: paper, cloth, leather, paste and glue. These are vulnerable to conditions and changes in the environment and should not be exposed to changes or extreme temperatures and humidity since damp conditions will create mold growth. Therefore, a cool, dry, and stable environment is ideal. Setting the relative humidity at the right level (45-55%) in book rooms that are in regular use is the key. Bolaseca has a wide range of moisture absorbers that can help you keep humidity at bay in archives and libraries.