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The amount of acid present in an object. Materials with pH below 7.0 on the pH scale are considered acidic. Objects closer to 0 on the scale have a higher acidity than objects closer to 7. The pH level of an object can be tested with pH strips, pH testing pens, or pH testing meters.

pH Scale

Related Terms


Synonyms in English



English acidity
French acidité
Spanish acidez
Portuguese acidez
Italian acidità
German Säure
Russian кислотность
Arabic حموضة


Testing and Instrumental Analysis


Anon. 2000. “Acidity.” Art and Architecture Thesaurus Online. Los Angeles, CA: J. Paul Getty Trust.

———. 2012. “Acidity.” CAMEO:Conservation and Art Material Encyclopedia Online. Boston: Museum of Fine Arts, Boston.

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