> Archival paper is interesting but largely unproven tech. Archival paper is tested by artificially aging it (e.g. exposure to heat and moisture to simulated p

> Archival paper is interesting but largely unproven tech. Archival paper is tested by artificially aging it (e.g. exposure to heat and moisture to simulated passage of time.) Some long-term tests are underway to determine whether accelerated aging tests accurately simulate the natural aging process.[1] And there are associated standards, e.g. ISO 5630-3.[2] But you are correct, we really have no proof of how modern archival paper will perform over a multi-century timeline. [1]https://www.loc.gov/preservation/scientists/projects/100-yr_nat_aging.html https://www.loc.gov/preservation/scientists/projects/100-yr_... [2]http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=23402 http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_...