A dustproof, finely constructed ready to use clamshell box especially designed for books and unbound loose objects. Totally smooth interior and exterior surfaces. Produced from board qualities with weights ranging from approximately 330 to 900 g/m2.
We confirm that our board and paper qualities and the products manufactured from them meet the following conditions:
100 % bleached cellulose (alpha cellulose)
without usage of recycled fibres
lignin-free ( free from wooden fibres)
acid-free; pH value 8,0 - 9,5 and in accordance with ISO 6588-1-2005 cold extract
Buffer sunbstance > 2 % natural calcium carbonate (GCC)
neutral / synthetic sizing (without alum additive)
with PAT certificate.
Herewith we guarantee that our board and paper qualities correspond to the technological basis of the ISO 9706 standard as well as to the DIN 6738 LDK 12-80 standard, which is the highest level of permanency.