U-style envelopes used for archiving were made by cutting off the flap of letter envelopes. A major disadvantage was that the letter envelope material was not ageing-resistant. U-style envelopes for long-term storage are manufactured from ageing-resistant paper or polyester.
made from transparent paper
Photographic envelope enclosures in U-style, made from transparent archival paper without an alkaline buffer. The envelope opening is on the longer side. Suitable for archiving photographs, negatives and glass slides. Other sizes available upon request.» to the product
made from opaque paper
Premium-quality photographic archival envelopes with gumming on the exterior for storage of prints, negatives, microfiches and glass plates. The envelopes are made of ageing-resistant photographic archival paper with the opening located on the long side of the envelope. They are available buffered or unbuffered, and in white or natural white. Gumming on the envelope exteriors ensures smooth interior surfaces.» to the product
made from polyester
Transparent SECOL polyester pocket pages available in various formats and thickness 0.075 mm (75 micron). Photographic Activity Test (PAT) passed in accordance with the ISO 18916 norm.» to the product