Stratum.black Open reference

Glossary · Curation

Acid-free and archival

Paper and board made without lignin and with a neutral or alkaline pH, sometimes buffered with calcium carbonate; used for labels, trays and boxes so they do not degrade or emit acid.

Paper and board made without lignin and with a neutral or alkaline pH, sometimes buffered with calcium carbonate; used for labels, trays and boxes so they do not degrade or emit acid. Buffered board is right for shells and bone, unbuffered tissue for amber and some organics.

Sources

Cite this article

Stratum Strata. "Acid-free and archival" (Glossary). Stratum Strata pack 2026.09, as of 2026-09-16. https://stratum.black/strata/glossary/acid-free. Accessed 2026-09-21.

BibTeX · CSL-JSON

@misc{stratum-acid-free,
  title        = {Acid-free and archival},
  author       = {{Stratum Strata}},
  howpublished = {\url{https://stratum.black/strata/glossary/acid-free}},
  year         = {2026},
  note         = {Glossary article, Stratum Strata pack 2026.09, as of 2026-09-16; sources: stratum. Accessed 2026-09-21.}
}

Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.

Sources for this article: Stratum editorial (Stratum editorial). As of 2026-09-16; Strata pack 2026.09. Written by Stratum in our own words; the works cited are where the science lives, and none of their text is reproduced here.

Found an error? Write to drew@tyr.ac with the article id glossary:acid-free.

Stratum is the inventory, provenance and certificate system for fossil, mineral and shell collections. Strata is its open reference: every fact cites its source, and the credits page lists each one with its licence.

CreditsVerifySitemap