The collection we store, consists mainly of  paper-based material. We know that paper deteriorates and is subject to natural aging. Using optimal storage conditions and care in handling, the deterioration process can be slowed down. However signs of damage may appear in the documents, such as: grime, folds, cracks, stains, discolouration, mould, foxing, adhesive staining, demanding that the document needs to be restored and thus create  considerable costs for the archive.
Before Restoration
After Restoration