Standard Sizes, Brightest Core, Acid And Lignin Free
"Standard" with a difference. Besides the beautiful white core, Tru-White™ core mats are not only acid free-they are lignin free. Why does that matter? Acid is the natural property of paper mats. It causes the core to change color and degrades the image. Lignin is the ingredient in paper that causes the acid. If you don't take it out, an "acid-free" mat turns acidic in a relatively short time. Mats are approximately .050 thick and mat windows, unless specifically noted are centered so they can be used with a landscape image (horizontal) or a portrait image (vertical). All mats are buffered with calcium carbonate to resist acidity from the environment and other materials.
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Due to color variations of different monitors, colors shown are approximate only.