{"schemaVersion":"1.0","generatedAt":"2026-09-22","licence":{"status":"not-yet-granted","spdx":null,"statement":"No licence has yet been granted for SmellBook-created datasets. They are publicly readable; reuse beyond citation and quotation needs permission until a licence is published."},"node":{"entityType":"claim","urn":"smellbook:claim:old-book-paper-degradation-volatiles","key":"old-book-paper-degradation-volatiles","label":"Old-book aroma and paper degradation volatiles","description":"Research on historic paper has measured volatile organic compounds released during material degradation and linked those emissions to the characteristic smell of old books.","scope":"Supports the role of paper degradation volatiles; individual books and libraries can differ by materials, storage and environment.","evidenceClass":"scientific","canonicalUrl":"https://smellbook.com/evidence/claims/old-book-paper-degradation-volatiles","attribution":"SmellBook (https://smellbook.com)"},"outgoing":[{"relation":"cites-source","label":"cites source","entity":"smellbook:source:old-book-2009","entityLabel":"Material Degradomics: On the Smell of Old Books","record":"/data/graph/source/old-book-2009.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-OLDBOOK-001].sourceIds","evidenceClass":"editorial"}]},{"relation":"claim-about","label":"claim about","entity":"smellbook:smell:library","entityLabel":"Library","record":"/data/graph/smell/library.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-OLDBOOK-001].smellSlugs","evidenceClass":"editorial"}]},{"relation":"claim-about","label":"claim about","entity":"smellbook:smell:old-book","entityLabel":"Old Book","record":"/data/graph/smell/old-book.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-OLDBOOK-001].smellSlugs","evidenceClass":"editorial"}]}],"incoming":[],"corrections":[],"citation":null,"boundary":"Edges are typed and unweighted; none is a similarity, recommendation or personalization score. Browser-local Personal SmellBook data is never part of this export."}