ブックタイトルConservation and Restoration of Western Paper

概要

Conservation and Restoration of Western Paper

Photo 22 After treatmentPhoto 23 After treatmentavoided for repairing ink areas in fear ofdiffusing the iron ions in the iron gall ink,and HPC diluted in ethanol was chieflyused instead.2 Deacidification treatment for oxidizedand acidic papersSeverely deteriorated newspapers withlittle paper strength were judged in need ofdeacidification treatment but future expectedconditions were taken into consideration fordecision making. For instance, in the future,the lining paper would be replaced with newJapanese paper and during the procedure,the object will undergo aquarious treatment.Such object will avoid the use of nonaqueousmagnesium oxide in deacidificationsince magnesium oxide is known to reducethe brightness when in contact with water. 18Therefore, the object was washed with ionexchanged water, then deacidified in anaqueous calcium hydroxide bath. After thepH was 7.3 (on average), it was lined with avery thin kozo paper.On the other hand, acidic notebooksstill had paper strength and were stable.Assuming that they will be stored in anenvironment where acid hydrolysis will bemitigated, the decision made with expertswas minimal intervention.Photo 24 Storage3 Support of the ink areasThe iron gall inks did not present the needfor chelating treatments 19 , instead, affectedareas were washed followed with locallinings using a very thin kozo paper.4 Treatment of cellophane tapes andstaplesCellophane tapes had hardened, discoloredand feared adhesive migration. They wereremoved with preservation pencils andthe remaining adhesives were removedwith solvents depending upon the object’scondition. Rusted staples were removed toprevent further spread of damage.5 Repair of covers and sewing threadsFor the repair of the case binding covers,safe materials were prepared with kozo paperlined cotton fabric using shin-nori insteadof commercial mending tapes. The adhesivewas selected through comparative study40