Opaque Envelopes – L-style

Envelope enclosures with a L-style opening, open on two adjacent sides. The envelopes are made from buffered museum paper, 120 gsm, light white in colour, without optical brightening agents (OBA-free). The envelope is gummed on the shorter, interior side. Both, paper and glue have passed the Photographic Activity Test (PAT) in accordance with ISO 18916.

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