“Verdi” four flap ennclosures are made from a single sheet of Duralong Cotton paper, adhesive free. Duralong Cotton is a 100% cotton, unbuffered, high-purity paper, containing no chemicals whatsoever. It`s produced with a "round machine"; with this type of processing the paper is not too pressed (un-calendered) very porous to allow maximum air flow and prevent any potentially harmful build up of gases.“Verdi” four flap ennclosures are fitted with a double crease (2 mm) to make folding easier, ideal for the storage of glass plate negatives. Photographic glass plates can be safely stored with no risk of pressure marks and can also be viewed, without being removed from their protective coating, by just unfolding the flaps and leaving the plate untouched, safely on a flat surface.

TECHNICAL SPECIFICATIONS

• 100% pure cotton fibre
• Unbuffered
• pH 6.7 - 7,0
• Uncalendered surface to allow maximum airflow