Bi-Corr Cross Direction Perma Dur Corrugated Board

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For ultimate strength and rigidity in archival board, we offer Bir-corr Cross Direction Perma/Dur Corrugated board. As the name suggests, we laminate two layers of our very best corrugated board together so the corrugation of each runs perpendicular to the other. The result is a light weight board of exceptional strength which resists bending, folding, or curling. This blue/grey board, with its 6mm thickness, is exceptional for picture frame backing, but is equally effective as a sturdy display construction material. In fact, it excels in any application which requires a strong but lightweight acid-free material. A 3% calcium carbonate buffer offers additional protection from atmospheric pollutants. Like both our single and double wall corrugated boards shown above, this board is made of bleached cellulose fibres and is acid-free and lignin-free. pH 8.5.