Unbuffered acidfree tissue is perfect for storing photographs and clothing that is sensitive to a higher pH level. Just layer this archival quality 8"x10" interleaving tissue between your photos or digital images to protect them from acid migration and abrasion. Note: Unbuffered tissue is pH neutral, and works well for storing most items including photographs and documents. Buffered tissue has an alkaline composition achieved by adding calcium carbonate. Buffered tissue will also work for photos but if you are preserving textiles, it is better to use buffered tissue for natural plant derived fibers and un-buffered tissue for animal fibers.