Heritage® Clamshell Box

  • Materials that have a pH of 7.0 or higher.
  • Need a different size or material? This item is customizable. Please inquire.
  • The Photo Activity Test (PAT) is an accelerated test that predicts the affects a material may have on photographic images.
  • This product has been made in our facility in Brooklyn, NY! We are proud to have been certified as a Brooklyn-Made Company by the Brooklyn Chamber of Commerce.
SKU: Heritage-Clamshell


1 - 9 (Boxes) $5.10 - $37.50
10 - 19 (Boxes) $4.75 - $34.75
20 - 49 (Boxes) $3.95 - $31.50
50 + (Boxes) $3.80 - $28.95
$5.10 to $37.50


Heritage®Clamshell Boxes are the finest archival storage boxes on the market and constructed from our exclusive Heritage® Corrugated Board. It's strength and rigidity makes this box ideal for storing precious materials and documents. All boxes are constructed from E-flute (1.6mm) with the exception of the 20"x24" boxes which are constructed from B-flute (3mm).

One piece construction, where the cover folds back and the box opens flat. These boxes ship flat and are easily assembled without requiring tape or adhesive. This allows bulk ordering without space limitations and reduces freight and damage in transit.

Dimensions above are inside dimensions, and are 1/2" larger in both dimensions.*
For example, a 4"x6" will have a interior size of 4.5"x6.5"

*The 10"x12" and 10"x15" have a ¼" margin.

Technical Information

Assembly Instructions
Heritage Corrugated Board is manufactured to the following specifications:
*100% bleached alpha cellulose
*Without the use of recycled or wooden fibers
*No optical brighteners
*Kappa level: 1 - 2 = lignin-free (TAPPI T 236 om-99)
*pH cold extraction: 8.0 - 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