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