Question

Why do old books and newspaper turns yellow?​

Answer 1

Answer:

because in newspaper and books they used recycled paper so they turn yellow after some time

Answer 2

• Paper is made from wood, which is largely white also has a dark substance called lignin, which ends up in the paper..
• Lignin eventually turns paper kilo because of oxidation i.e. the lignin molecules, when exposed to oxygen being to change and become less stable.