Irish seemed to think of something, "I still couldn't understand why those papers burned themselves without any reason."
"It was due to a solution of polyether and methyl diisocyanate." Joseph told her, "Later, I saw the comburent in the study room, and there was a special solution on the papers. And it contained some elements with a characteristic of spontaneous combustion, such as polyether and methyl diisocyanate."
Actually, when Irish was in senior high school, she hated chemistry and physics the most. She felt more confused when Joseph said it. She knew his expertise in science, and it was just a little case for him.
However, she couldn't understand it.
