Műtárgyvédelem, 2007 (Magyar Nemzeti Múzeum)
Válogatás az utóbbi évek magyar papír- és könyvrestaurálási munkáiból - Összefoglalók
poultices, where Klucel in distilled water was used to soften the proteinous adhesive, and Klucel in isopropanole was used for all remaining adhesives. The softened adhesive was carefully scraped off the original cover. Once the cover was free, conservation was completed by filling any losses with pigskin. The presentation will also include the results of research into the origin of the rennaisance cover. Laminating Vellum to Board: The Multiple Role of Priming of Vellum for Fine Bindings Manfred Mayer Priming of vellum plays different roles in the fabrication of stiff-vellum bindings. Besides turning the parchment opaque, priming acts mainly as a flexible link between the vellum and the board. More importantly however, it prevents humidification of the vellum when it is coated with glue and therefore reduces the risk of distortion in the boards. It is believed that this is a more-or-less forgotten practice, which is very valuable. Experiments have been carried out to reproduce the traditional methods. This paper describes the preparation of vellum and the primer including some advice on how to stretch the vellum and prepare the primer. Experiments for the Separation of Blocked Coated Papers Beatrix Kastaly, Veronika Szalai Under the influence of water and pressure, for example following a flood, the leaves of books and journals printed on coated paper tend to block in smaller or bigger sections. The strong adherence is caused either by the binding agent of the coating or that of the printing ink, perhaps by the two binding agents together. The separation of these leaves is generally not possible by mechanical means without damaging the printed surface. The professional literature has provided some information both on the type (natural or synthetic) and the solubility of binding agents of coatings applied during various periods of papermaking, as well as on the binding agents in the printing inks and their solvents. Experiments for separating the leaves have been performed on books and leaflets printed with black and/or colour printing inks on coated paper from the 1910s, 1930s and 1980s, respectively. These tests entailed the use of warm or hot water, enzymes, solvents and poultices. In the case of natural, water-soluble binding agents (proteins and starches) of coatings good results could be obtained with warm or hot water. This was also true for the cellulose-derivatives and polyvinyl-alcohol. The breakdown of water- soluble, natural binding agents was completed by specific enzymes. Separation of leaves was also successful using poultices made of methylcellulose or hydroxy- propyl-cellulose of medium viscosity, separating the leaves one by one. Certain synthetic binding agents were found to be soluble through mixtures of ethyl acetate and water. Ethyl acetate usually dissolves neither the binding agents of the printing inks nor the pigments themselves. However, if the binding media of the printing inks rather than the coatings causes the adherence, the application of a borax-solution or the mixture of borax and boric acid was found to be effective 254
