PostMarked Greeting Card & Keepsake Infinity∞Sleeves™ are constructed from archival quality polypropylene. Not only are our patented Infinity∞Sleeves™ PVC and acid free, but they won’t lift inks from printed materials.
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For sturdy support that won’t interfere with the viewing and sharing of your mementos, each Infinity∞Sleeve has a thickness of 0.12 mm.
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Simply make sure to store your Infinity∞Sleeves in a cool, dry place away from sunlight when not in use, and they will shield your keepsakes from damage whether they’re stored in a PostMarked Greeting Card & Keepsake Archive Album™, a compatible 3-ring binder, or a weathered old shoe box.

 
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