Why do newspapers turn yellow over time?

Question

Just interested!

Answer 1

Paper is made from wood, which is made up mainly of white cellulose. Wood also has a lot of a dark substance in it called lignin, which ends up in the paper, too, along with the cellulose. The exposure of lignin to air and sunlight is what turns paper yellow.

Answer 2

Newsprint has a higher sulfur content than more refined white paper; it's cheaper that way.

Answer 3

because there old  

Answer 4

Paper is made from wood, which contains a substance called lignin. The exposure of lignin to air and sunlight is what turns paper yellow due to

oxidation.

If newsprint were kept completely out of sunlight and air, it would remain white. After only a few hours of sunlight and oxygen, however, it will start to change color.

Answer 5

they get yellow because they must have gotten wet one time, that or they are really, really old!