Foxing is the brown spots that age brings to old paper. Look for foxing.
Nobody is entirely sure of the cause, though iron in the paper and damp both play a part. Foxing lowers the value of a book and does no real harm to the paper itself.
1nounfoxingThe brown spots that age brings to old paper.
“The foxing had reached every page by the 1970s.”
foxing is a mark.
Middle English
fox
English
fox
English, today
foxing
Built from
fox comes from Middle English fox. From Middle English fox, from Old English fox (“fox”), from Proto-West Germanic fuhs, from Proto-Germanic fuhsaz (“fox”), from Proto-Indo-European púḱsos (“the tailed one”), possibly from puḱ- (“tail”). 2
Etymology from Wiktionary, CC BY-SA
Practised in Libraries & Museums