Proper storage environments can help ward off structural, chemical and environmental changes which affects the long-term preservation of parchment. Storage factors must take into account the factors of the particular parchment object, including its condition, age, storage history and plans for use. Illuminated manuscripts and composite parchment objects, which may include seals and ribbons, may have additional storage needs. A consistent storage environment is crucial for the long-term stability of parchment, which is especially vulnerable to changes in humidity, temperature and other environmental factors.