Why Do Book Pages Go Brown
If you love books and try diligently to take care of them, it can be distressing to find that the pages of some of your classic collectibles no longer look pristine. You find you are downgrading their condition from good to fair, just because of the brown spots (also called foxing), yellowing, or browning over the pages. Foxing Heavy foxing on the title page of an 1832 textbook Foxing is an age-related process of deterioration that causes spots and browning on paper documents such as books, postage stamps, old paper money and certificates, and on textiles like clothing and artists' canvasses.
I just opened some old (3-4years) books that i hadn't even touched for a few years and am devastated to see that they've all become yellowed and have brown and dark yellow spots all over the pages, some covers and pages have these brown/black dots on them, looks like if you'd stab a page with the tip of your pen, where'd this come from? Book leaves that are more brown and brittle along the edges than in the center clearly illustrate this absorption of pollutants from the air. Research by the Library of Congress has demonstrated that cellulose itself generates acids as it ages, including formic, acetic, lactic, and oxalic acids. Imagine pulling a book from the shelf and noticing the pages have yellowed since it was purchased.
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You open the book, only to see brown spots all over the title page. Confused, you close the book, and flakes of leather fall to the floor. "What happened to my book?" you wonder.
But books may be exposed to moisture or environmental air pollutants that interact with the parts of the books. Archivists have long dealt with the problem of deteriorating books and papers. While processes developed in the 1930s and standardized in the 1980s make this issue less of a problem for newer volumes, the browning of pages in older books will continue to be both part of the charm and challenge of book collecting.
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Discover what foxing in books is, its causes, and how to prevent it in your collection to maintain their value and quality. Foxing Foxing is an age-related process of deterioration that causes spots and browning on old paper documents such as books, postage stamps, old paper money and certificates. The name may derive from the fox-like reddish-brown color of the stains, or the rust chemical ferric oxide which may be involved.
Paper so affected is said to be "foxed". But newspaper - which is made cheaply - has more lignin in it than a typical textbook page, so it turns a yellow-brown color faster than other types of paper, she said. Why do the pages of a book turn brown? This process yields chemicals called o-quinones that then produce brown-colored melanin - the dark pigment present in our skin, eyes and hair.
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Typically, paper manufacturers try to remove as much lignin as possible by using a bleaching process, according to Richardson.
