Pina Zangaro Polypropylene Sheet Protectors are welded and have become an industry standard for the preservation of both art and print work. The weld parallel to the binding edge acts as a hinge, allowing the sheets to lie perfectly flat, making these sheets ideal for use in screwpost books.
- Lined with 10 pt. black acid-free and lignen-free paper
- Pass the Photographic Activity Test (PAT) and meet all ANSI requirements for archival storage