我想問紙，如簿，書，要加熱到幾多度才燒著？是不是愈厚所需溫度愈高？ 如果是字典，要幾多度才燒著？謝謝！?

The ignition temperature (also refers as auto-ignition temperature) for paper is commonly taken as 233 degrees Centigrade (or 451' F). Since there are different kinds of paper with various material composition, volume, density and shape, the ignition temperature may varies from around 218'C to 246'C.

Reference: http://hypertextbook.com/facts/2003/LewisChung.shtml

It takes a few minutes for a sheet of paper to burst into flames when it is put at its ignition temperature, but it would take much longer than that for a thick book. The dense material in the center of a book shunts heat away from the outside edges, preventing them from reaching the auto-ignition temperature.