bullet proof materials

[imperium2600]

can anyone explain the precess on how to make kevlar, or ceramic plate armor
even vectran , the knife resistant material would be helpful.

[berkeman]

This wikipedia article should get you started:

http://en.wikipedia.org/wiki/Bulletproof_vest

You can probably search for Kevlar at wikipedia too, if it's more the chemistry of the material that you're interested in.

[Cesium]

Off the top of my head, I believe boron carbide is used in bullet proof vests. It is very hard and used for other things like diamond cutters, etc.