Page 51 - Bresciani Paper Conservation

Corrugated board
BRESCIANI
Materiali ed Attrezzature
per il Restauro e la Conservazione
K021 –MW 1.8 mm
Corrugated board made from ageing resistant material, total thickness 1.8 mm, natural white in colour. Top ply laminated with light grey archival paper (048), 130 gsm, surface with special treatment: dirt-resistant, erasable and rub-proof (dry wiping). The individual plies are glued moisture-proof (wet-strengthened) and the board is ageing resistant in accordance with ISO 9706. This corrugated board quality is the base material used for making archival boxes, files, folders and is also ideal for conservation quality frame backings.
Base paper
• 100 % bleached cellulose
• Without the usage of recycling fibres
• Free of wooden fibres
• Kappa level 1 - 2 = lignin-free
• pH 7.5 - 10.0 = acid-free (in accordance with ISO 6588-1:2005)
• Alkaline buffer > 2 % natural calcium carbonate (GCC)
• Sizing: neutral/synthetic (without alum additive)
• Top surface sizing: Cobb60 in accordance with ISO 535 < 25
• Without optical brightening agents (OBA-free)
• Lightfastness approx. 5 - 6 (good - very good) in accordance with the wool scale (EN ISO 105-B02)
• No bleeding in accordance with DIN ISO 16245:2012
• Photographic Activity Test (PAT) passed in accordance with ISO 18916:2007
• Special surface strengthening (dirt-resistant and erasable)
Glue used for the corrugated board
• Starch-based adhesive • pH > 8.0
• Moisture-proof gumming
Glue used for lamination
• Dispersion glue free of solvents and plasticizers (softening agents) • pH approx. 7.0
• Photographic Activity Test (PAT) passed in accordance with ISO 18916:2007
DIN EN ISO 9706:2010 Information and documentation - Paper for documents - Requirements for permanence
DIN ISO 16245:2012 Information and documentation - Boxes, file covers and other enclosures, made from cellulosic
materials, for storage of paper and parchment documents.
ANSI/ NISO Z.39.48:1992 American National Standard for Permanence of Paper for Publications and Documents in Libraries and Archives
DIN 6738:2007 Highest level of permanency LDK 24-85
Basic board material used for making folders and storage boxes for archiving purposes as well as for conservation quality picture framing (mounts and backings).
Top surface with special surface treatment, dirt-resistant, erasable and rub-proof
(dry wiping). The board possesses excellent flatness, can be cut easily using
any commercial cutter.
Corrugated board MW 1.8 mm – long grain “LG“
Item K021-148
Top ply light grey ; base natural white
Outer ply 130 gsm 048 light grey Intermediate ply 190 gsm – natural white E-flute 135 gsm natural white
Outer ply 190 gsm natural white
BRESCIANI s.r.l. - via Breda 142 - 20126 Milano - tel. 02.27002121 r.a. - fax 02.2576184 www.brescianisrl.it - e-mail: info@brescianisrl.it Pag.50/97