Quote:
Originally Posted by leebase
Your library dusts it's books? Fancy 
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Necessary for the old libraries which can have books a hundred or more years old. One guide was to run a cleaning cycle for the entire collection every 5 to 8 years.
Now days, we have easier ways to prevent dust and mildew..
First a clean filtered air supply. (The real change in the last 50 years.)
Floors totally cleaned every day so as not to have dirt and dust to kick around. Mats at the entrances to catch the dirt.
Vacuuming floors, shelves and books.
Many of the older books, at least, are copied to digital media.
I remember librarians, usually young interns, dusting each shelf with a feather duster or nowadays it would be microfiber perhaps.
See Amazon:
https://www.amazon.com/Handmade-Wash.../dp/B07PN4QJD4