35pt, acid-free, 3% buffered backing board. Genuine acid-free, cellular fiber. Meets strict U.S. Government standards for archival storage. 3% calcium carbonate buffer throughout, maintains a neutral pH. One side white. The highest quality backing board available anywhere. Sold in packages of 50.
Protect Your Collectibles from the Effects of Aging
Get Protection from a Variety of Hazards!
- Humidity
- Volatile Poly Bag Breakdown
- Acid Migration
- Oxygen Decomposition
- Insects
- Ultra-Violet Fading
- Mold & Mildew
- Oils & Greases
Sold in packs of 50 sleeves!
- Made from 2 mil thick Mylar D®.
- Dimensions are width x height plus flap.
- Flap can be folded over, tucked in, or taped closed.
- The 2 mil sleeves are twice the thickness and 4 times the protection of 1 mil thick bags.
- The most popular Mylar sleeve.
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