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Black and white hinged portfolio box with textured cover and flat-open lid

Archival Methods

Archival Methods Onyx 9x12x2" Portfolio Box Black/White

SKU CH-KP6S-QCNGM

A hinged portfolio box stores 9 × 12 inch artwork flat, using acid-free board and PAT-tested buckram to protect prints while presenting them on a clean white interior

  • Acid- and lignin-free 80 lb lining protects artwork
  • PAT tested for long-term archival safety
  • Moisture-resistant F-Grade Buckram cover shields contents
  • Reinforced hinge and close-tolerance build keep out dust
  • Hinged lid folds flat for instant access and presentation

Archival Onyx Portfolio Box

The Archival Methods Onyx portfolio box is built for artists, photographers and archivists who need to present prints and photographs regularly while keeping them safely housed between viewings. Its hinged design lets the lid fold flat for instant access and smooth transfer of work from one side to the other, turning secure storage into a professional display stage.

Conservation Materials and Seal

The box core uses Kappa binder's board measuring .1 inch with no glue between layers, lined with 80 lb acid- and lignin-free paper that has passed PAT testing. A library-quality F-Grade Buckram cover with a 100% aqueous acrylic coating resists moisture, while the pH-balanced adhesive contains less than .0008% sulfur and the close-tolerance construction keeps dust out.

Upgrade from Basic Sleeves

This portfolio box replaces loose sleeves, simple folders or open trays that leave work exposed to dust, light and handling damage when items are moved for review. The reinforced hinge and rigid construction make the step up worthwhile whenever presentation quality and long-term preservation matter equally for a working collection.

How it compares

Measured against everything we stock in Calculators & Classroom Supplies, at today’s prices. Recalculated every night.

Price $41.99
Pricier than about 67% of the 1,255 comparable items (median $25.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I assemble the reinforced hinge on the 9x12x2" box so the lid lies flat?

The box ships fully assembled; the reinforced hinge is already built in. Simply lift the lid until it clicks open and it will rest flat on the table.

Will the 80 lb acid-free lining or the F-Grade Buckram cover need replacing over time?

Both materials are archival-grade and designed for long-term use. The lining resists acid migration and the Buckram coating resists moisture, so neither requires scheduled replacement.

At what point does the Kappa binder's board core start to flex under a full load of prints?

The 0.1-inch Kappa board core is rigid for its thickness. Noticeable flex only appears when the box is overfilled beyond the 2-inch depth, stressing the close-tolerance edges.

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