Description 1500 micron Solid Core Black Conservation Mount Board. 800x1200mm. Sold in packs of 5 sheets. Board • 100% bleached cellulose • without the usage of recycling fibres • free of wooden fibres • Kappa level 1 – 2 = lignin-free • pH approx. 8.0 = acid-free (in accordance with ISO 6588-1:2020) • alkaline buffer > 3% natural calcium carbonate (GCC) • light-fastness approx. 7 – 8 (= extremely good) in accordance with the wool scale (EN ISO 105-B02) • Photographic Activity Test (PAT) passed in accordance with ISO 18916:2007 • without optical brightening agents Glue used for lamination • dispersion glue free of solvents and plasticizers (softening agents) • pH approx. 7.0 • Photographic Activity Test (PAT) passed in accordance with ISO 18916:2007 This quality corresponds to the technological basis of the following standards: DIN EN ISO 9706 Information and documentation – Paper for documents – Requirements for permanence ANSI/ NISO Z.39.48 American National Standard for Permanence of Paper for Publications and Documents in Libraries and Archives DIN 6738:2007 Highest level of permanency LDK 24-85
