How is foam made?

Question

looking at foam on my comic releif red nose. I wanted to know how it was made.

Answer 1

Foam is made by mixing a number of chemicals and adding a "gassing agent" that makes bubbles that make the plastic cellular.

http://www.foamprops.com/about/facts.htm

http://www.madsci.org/posts/archives/2000-07/962663656.Ch.r.html

http://www.kreysler.com/projects/foam.htm

http://answers.google.com/answers/threadview?id=705840

Answer 2

it comes from a foam tree. Only found in sub sahara africa.

Answer 3

It's made of spong rubber.