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Browning of paper in old books is caused by

This question belongs to General Knowledge Chemistry
Chemistry
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Browning of paper in old books is caused by

Answer & Solution
Correct Answer: Option D
Foxing is a term describing the age-related spots and browning seen on vintage paper documents such as books, postage stamps, certificates, and so forth. It results from localized accelerated oxidation of cellulose or the effect on certain papers of the oxidation of iron, copper, etc.
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