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Gaylord Archival Specifications & the P.A.T. Logo

We list the specifications for our archival products right with the product, so you know exactly what you're getting.



  • Acid-free; lignin-free
  • pH 8.0–9.0
  • 60 pt. Barrier board
  • Blue/grey with white liner
  • 3% Calcium carbonate buffer
  • Passed P.A.T.

Acid-Free – Having a pH of 7.0 or greater at the time of manufacture.

Lignin-Free – Must test negative for lignin, a component of plant cells believed to aid chemical degradation.

pH – The pH of the paper material at the time of manufacture; 7 is neutral; 0 to 6.9 is acidic, 7.1 to 14 is alkaline. Papers and boards usually test within a pH range. Plastics are not described by pH.

Construction – The thickness and type of material; pt. and mil are both terms that indicate 1/1,000 of an inch.

Color – Our colors won't bleed.

Buffer – This line indicates whether or not an alkaline substance has been added to neutralize acids or counteract acids in the future; some items may be sensitive to alkalinity and require unbuffered materials.


What is the P.A.T.?


The Photographic Activity Test (P.A.T.) is a simulated aging test developed by the Image Permanence Institute to predict which storage materials will cause accelerated deterioration or staining in photos, a very sensitive medium. Most of our storage materials have been submitted and passed the test. The absence of the logo does not indicate that a product has failed the P.A.T., as some products have not yet been tested.