Heritage Newspaper Boxes are constructed from our exclusive B-flute Heritage Corrugated Board. It's strength and rigidity makes this box ideal for storing precious materials and documents.
*100% bleached alpha cellulose
*Without the use of recycled or wooden fibers
*No optical brighteners
*Kappa level: 1 â€“ 2 = lignin-free (TAPPI T 236 om-99)
*pH cold extraction: 8.0 â€“ 9.5 (TAPPI T 509 om-02)
*Alkaline reserve (buffer) > 3% calcium carbonate
*Adhesive: Potato starch, ph 7.0, moisture proof.
ANSI IT 9.16 / ISO 14523-1999 (PAT test)
ISO 9706 - Permanency requirements for paper
ANSI / NISO Z.39.48-1992 Permanence for paper in Library and Archives