These chambers are most essential for preservation of old documents, paintings and manuscripts. This is a proven method of destroying insects and fungies which are very difficult to kill.
These machines are needed for dry lamination of documents for the purpose of preservation and are distinct from wet lamination process where the process is irreversible and thus not acceptable for the purpose of preservation of valuable documents which are meant to last for hundreds of years.
Freeze Drying is a process for preservation and restoration of old documents, pictures etc. This is especially suitable for restoring water damaged documents.