Unbuffered Perma Dur® Negative Envelopes

Sturdy Perma/Dur® Unbuffered Negative Envelopes are ideal for storage of negatives and photographs. On the recommendation of several photographic archivists, we have changed the seam design and added a new style without a thumb cut. The new side seam construction allows even stacking and filing, and prevents marring of the negative or photo within due to too much weight or pressure. Manufactured from a 120gsm lignin-free ivory stock with a pH of approximately 7.0 and a high alpha cellulose content. Seams are fastened with a neutral pH adhesive. Passes Photographic Activity Test.