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Pack of fifty white 13 by 19 inch acid-free card stock sheets 148gsm

Archival Methods

Archival Methods 13x19" Acid-Free Card Stock 148gsm 50/Pack White framing supply

SKU CH-WT8D-2MWYY

Acid-free 13x19" card stock protects photos from yellowing and passes the Photographic Activity Test ISO 18916

  • Protects photos long-term with archival quality card stock
  • Prevents yellowing using acid-free alkaline buffered material
  • Meets PAT ISO 18916 certification for photographic safety
  • Sturdy 148gsm alpha-cellulose pulp gives reliable backing
  • 13x19 inch white sheets enhance presentation in 50-pack

Archival Card Stock for Photos

Archival Methods 13x19" Acid-Free Card Stock supplies photographers, artists and archivists with a professional-grade mounting material. The 148gsm alpha-cellulose pulp board comes in a 50-sheet pack, providing a sturdy, neutral-white backing that enhances prints without introducing harmful acids or lignin.

PAT-Certified Acid-Free Protection

Buffered with calcium carbonate for a 2-3% alkaline reserve, the card stock maintains a pH of 9 (+/- .5) to prevent yellowing and embrittlement over time. It passes the Photographic Activity Test ISO 18916, guaranteeing safe long-term contact with photographic materials and documents.

Replaces Standard Mounting Board

This stock upgrades from standard mat or mounting boards that lack PAT certification or alkaline buffering, which can allow acid migration and deterioration. The jump is worth it when preserving valuable photographs, artwork or documents requires verified archival stability for generations.

How it compares

Measured against everything we stock in Picture Frames & Mats, at today’s prices. Recalculated every night.

Price $30.99
Pricier than about 66% of the 97 comparable items (median $22.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 13x19 inch acid-free card stock as a backing board, and what step do people often skip?

Cut the sheet to the exact frame opening using a straight edge, then place the buffered side facing the artwork; the step most often missed is confirming the pH 9 alkaline surface contacts the print to activate the calcium carbonate reserve.

What maintenance or replacement will the 148gsm card stock need over time?

The alkaline reserve of 2 to 3 percent calcium carbonate slowly neutralises environmental acids; once exhausted the board can no longer protect the artwork, so plan to swap it during the next reframing cycle.

What limit appears first when the card stock is under sustained display conditions?

The Photographic Activity Test ISO 18916 certification covers long-term contact safety, but the finite 2 to 3 percent alkaline buffer is the first limit reached, after which acid migration can resume.

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