How do they make a ping pong ball?

Ping pong balls are made of celluloid, which is the same material from which photographic film is made. No, it is not considered a true plastic. Celluloid is a composition of nitrocellulose and camphor. A flat sheet of celluloid is soaked in hot alcohol until soft. read more

Start by poking a hole in one side of a ping pong ball. Keep working at the hole until it's large enough to insert the pencil into it. Put the pencil in the ping pong ball. read more

Ping pong balls are filled with air. But because of the alcohol-based adhesives, and the materials of which the ball is made, if you were to pop a ping pong ball and breathe that air [NOTE THAT I DO NOT RECOMMEND THIS] it would smell of chemicals (think of the smell of photographic film, combined with model glue). read more