Having passed the Photographic Activity Test, or PAT, PB811 Archival Copy Paper from Print File is a suitable choice for making copies for preservation. The paper uses a combination of 75% alpha cellulose and 25% cotton rag in its base to create a white 20 lb bond matte media. Also, it has a visible watermark for identification and is acid and lignin free for longevity.
This paper is available here as a 500-pack of 8.5 x 11" sheets.
UPC: 029368940506