Archival board grey-blue

The gray-blue acid-free permanent archival cardboard in sheets is characterized by a refined surface that repels dirt and is resistant to wear. Thanks to the high proportion of long fibres, cardboard is excellent for making sleeves, folders or covers. This buffered cardboard does not contain lignin and can be used not only for the storage of valuable books, but also for the separation of works of art and photographs, as it has passed the PAT – photographic activity test . Does not contain optical brighteners.

• 100% bleached cellulose
• without recycled fibers
• without wood fibers
• kappa number< 5 (without lignin)
• pH 7.5 – 10.0, non-acidic according to ISO 6588-1:2021
• alkaline buffer> 3%, natural calcium carbonate
• sizing: neutral/synthetic without the addition of alum
• without optical brighteners
• light fastness approximately 7 – 8 (extremely good) according to the wool scale (EN ISO 105-B02)
• PAT ( Photographic Activity Test ) in accordance with ISO 18916:2025
• DIN EN ISO 9706:2026
• DIN ISO 16245:2023 – type A

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