Heritage Archival Acid-Free Buffered Folder Stock Bristol Board

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DescriptionHeritage Bristol Board is an archival quality bristol board which sets the standard for the highest quality folder stock material. The surface has been engineered to be super smooth, hard, durable, and dirt and rub resistant. Perfect for making folders, phase boxes, pamphlets, dividers, lining drawers and any other application requiring a dense strong and durable cardstock material. Excellent cutting and folding characteristics6pt = 0.15mm / 130gsm10pt = 0.25mm / 240gsm20pt = 0.5mm / 450gsmThe material is free of optical brighteners and passes the Photographic Activity Test (PAT) in accordance with ISO 18916. The light gray color is dyed throughout, and the surface is manufactured to be dirt rand rub resistant.Specifications- 100% bleached alpha cellulose - Without the use of recycled or wooden fibers - No optical brighteners - Kappa level: <5 = lignin-free (ISO 6588-1:2012) - pH cold extraction: 7.5 - 10 (TAPPI T 509 om-02) - Alkaline reserve (buffer) > 3% calcium carbonate - Adhesive: Potato starch, ph 7.0, moisture proof. Certification ANSI IT 9.16 / ISO 14523-1999 (PAT test) ISO 9706 - Permanency requirements for paperANSI / NISO Z.39.48-1992 Permanence for paper in Library and Archives

Buffered tissue provides an effective, economical way to protect all types of art and artifacts. Archivists and conservators rely on it to protect