Open Top Storage Boxes are designed for storing books, newspapers, brochures, magazines and collections of loose and unbound documents.
All our archival grade boxes are made out of paperboard with below assured quality parameters:
- 100 % bleached cellulose without the usage of recycling fibers
- 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
- Sizing: neutral/synthetic (without alum additive)
- Sizing according to Cobb 60 < 25
- Without optical brightening agents
- 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
