Heritage Clamshell MAX

  • 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-Max

Pricing

QuantityPrice
$98.95 to $199.50

Description

Maximum Strength. Archival First.


The Heritage Clamshell Max is our most robust clamshell enclosure to date — engineered for collections that demand superior structural protection without compromising archival integrity.


Built on the foundation of our trusted Heritage Clamshell Box, the Max version incorporates additional layers of B-flute corrugated board concealed within the upright walls and the floors of both the base and lid. This reinforced internal structure dramatically increases compression resistance, rigidity, and long-term durability, making it ideal for housing heavier, oversized, or high-value materials.


Designed as a practical alternative to a traditional Solander Case, the Heritage Clamshell Max prioritizes archival performance first and presentation second. While it offers a clean, professional appearance, its true purpose is protection — safeguarding books, prints, documents, portfolios, and artifacts from environmental stress, impact, and handling wear.


Key Features

  • Reinforced walls with concealed Heritage B-flute layers for exceptional strength.
  • Enhanced base and lid floors for improved load-bearing support.
  • Archival-quality materials throughout; down to the adhesives.
  • Acid-free and designed for long-term preservation and storage.
  • Durable clamshell construction for secure, repeated access.


The result is a box that delivers the protective integrity of a high-end case, while maintaining the archival standards professionals rely on.


All boxes are 2-½" in depth and have an additional ½" margin on each dimension to allow for comfortable storage of standard size materials. For example the 11"x14" box has inside dimensions of 11-½" x 14-½" x 2-½"

Technical Information

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.

Certification
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