Definition of acid-free
: not containing acid : having a neutral or alkaline pH
acid-free paper Every evening, trained volunteers will place any personal items or memorabilia left at the replica wall in archival folders or acid-free boxes.— Brian Burnes, Kansas City Star, 22 Sept. 2010
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“Acid-free.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acid-free. Accessed 2 Jul. 2022.
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Time Traveler for acid-free
The first known use of acid-free was in 1885
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