Gaylord Archival Specifications & The PAT Logo
|
Understanding Our Archival Specifications |
|
| We list the specifications for our archival products right with the product, so you know exactly what you're getting. |
| | Specifications:
Acid-free; lignin-free
pH 8.0–9.0
60-pt. Barrier board
Blue/grey with white liner
3% Calcium carbonate buffer
Passed PAT |
|
|
| Acid-Free—Having a pH of 7.0 or greater at the time of manufacture; 7 is neutral; 0 to 6.9 is acidic, 7.1 to 14 is alkaline. |
| pH—The pH of the paper material at time of manufacture; plastics are not described by pH. |
| Construction—The thickness and type of material; pt. and mil are both terms that indicate 1/1000 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. |
|
 |
| The Photographic Activity Test (PAT) 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. Some, like Melinex® polyester, polypropylene or polyethylene enclosures, have not been submitted because they are inherently stable. We don't sell anything which is known to have failed the PAT. |
