The professional conservator Dolors Velasco is in charge of the restoration of the fragments at the Historical Archive of Girona. The restoration and conservation of the fragments follow the principle of minimal intervention and the use of inoffensive high quality products with reversible effect. In general, the documents are difficult to retrieve, dirty and weakened by humidity and rodents.
Conservation itself begins with the separation of the bindings from the volumes. The outer parchment layer of the binding is humidified to enable the extraction of the inner layers. This inner filling of the bindings is made of paper leaves of reused documents stuck together with glue of animal origin (bones or skin) and contains an admixture of dust, dirt, sand, grease, etc. The glued paper leaves are immediately inserted into distillated water to dilute the old adhesive and separate the pages. The individual pages are then dried and the remaining traces of adhesives are again washed away. The dry paper leaves are subsequently solidified with cellulose-based adhesives. Finally, inserted into individual melinex protective wrappers and numbered, the fragments are put at the disposal of scholars and researchers.