Use our solid white unbuffered file folders to store materials such as leather, silk, vellum, textiles, blueprints and cyanotype prints that are sensitive to alkaline buffering agents. Made of a solid white 10 pt. virgin alpha cellulose, folders are acid and lignin-free (pH 7.0-7.5). Flush fold design with square corners provides complete coverage of filed materials. Passed P.A.T.
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