BORTTAGNING AV TRYCKKÄNSLIG TEJP PÅ PAPPER En studie över användningen av hydrogeler

Abstract

The purpose of this thesis is to examine hydrogels practical efficiency in the removal of pressure-sensitive tapes on paper. The organic agar gel and synthetically produced Nanorestore Gel® PG5 Peggy Gel and Nanorestore Gel® High Water Retention are used in an experimental process upon removing three common pressure-sensitive tapes (PTSs) on paper. The aim is to provide a broader knowledge on how to practically use these specific hydrogels using organic solvents. Upon the results of these experiments, a case study is carried out on a paper object with a decomposed tape strip, deeply integrated into the paper. The pressure-sensitive tape is carefully removed with Nanorestore Gel® High Water using ethyl acetate as solvent upon the removal of the carrier. The results of the study show the effectiveness of using synthetically produced hydrogels in the removal of pressure-sensitive tapes on paper and discuss the benefits it generates as a favorable option (for conservators who encounter similar problems in their profession). The study found that working with hydrogels as conservation treatment in removing pressure-sensitive tapes on paper is an effective and successful tool. Depending on the quality of the paper and specific type of PST, using hydrogels prepared with organic solvent removes the PST efficiently. The Nanorestore Gels® stood out in comparison with the agar gel, with less time consuming application and advantageous absorption capacity.