2006-08-11 05:41:38 · 8 answers · asked by Divya S 1 in Science & Mathematics ➔ Chemistry
Most paper is made from pulp that has a high acid content. Over time the acid in the paper makes the fibers yellow. It is possible to buy paper that is low in acid in order to preserve documents over longer periods of time.
2006-08-11 05:46:33 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Paper yellows primarily due to the pressence of acidic chemicals left behind in the pulp. The process of yellowing is accelerated by heat and humidity.
2006-08-11 12:48:17 · answer #2 · answered by Tom M 2 · 0⤊ 0⤋
pH paper between 7 to 1
2006-08-11 13:48:32 · answer #3 · answered by Joeng 3 · 0⤊ 0⤋
Various chemicals used in the preparation of paper slowly react with the cellulose which make up the papers bulk, dehydrating it and thus rendering it yellow and also making it brittle. Certain species of fungi are also known to accelerate the process and give old books their characteristic musty smell.
2006-08-11 12:52:21 · answer #4 · answered by ag_iitkgp 7 · 0⤊ 0⤋
Acid used in paper production causes the yellowing.
The cheaper the paper the more acid that's used. That's why cheaper paper, such as newsprint, yellows so quickly.
2006-08-11 12:48:14 · answer #5 · answered by Oh Boy! 5 · 0⤊ 0⤋
acid in the paper
2006-08-11 12:46:30 · answer #6 · answered by DesignR 5 · 0⤊ 0⤋
because of the chemical change
2006-08-11 12:54:28 · answer #7 · answered by Anonymous · 0⤊ 0⤋
may be it gets oxidized..
2006-08-11 12:49:52 · answer #8 · answered by wish_not 1 · 0⤊ 0⤋