Helklar polyesterfilm fastsydd med bomullstråd på syrfri board.
Specifikation på boarden: 100 % bleached cellulose. Without the usage of recycling fibres. Free of wooden fibres.
Kappa level 1 2 = lignin-free. pH 7.5 - 10.0 = acid-free (in accordance with ISO 6588-1:2012). Alkaline buffer > 3 % natural calcium carbonate (GCC). Sizing: neutral/synthetic (without alum additive). Without optical brightening agents. Photographic Activity Test (PAT) passed in accordance with ISO 18916:2007.