Butvar® B-76-Coated Japanese Tissues for Non-Aqueous Lining of Paper Documents

In this study, an alternative method for non-aqueous and non-alcoholic lining of paper documents is proposed, with Japanese tissue paper pre-coated with polyvinyl butyral (Butvar® B-76) adhesive used as the lining material. The adhesive layer is activated with a solvent mixture of dimethyl carbonate and n -hexane. The findings of the conducted tests indicate that the proposed method is safe with regard to the tested writing and printing media. Furthermore, it does not alter the paper structure or cause any deformation of the folios. In order to evaluate the effectiveness of the lining and the ageing characteristics of the pre-coated tissue, the mechanical properties of the lined samples, their colour stability, the pH values of the aqueous extracts and the removability of the lining tissue were tested both before and after accelerated degradation. The results were considered satisfactory.