What Are The 4 Bunsen Burner Flames?

The four(4) flame types of Bunsen burner is depending on flow through the throat holes (holes on the side of the Bunsen burner -- not to be confused with the needle valve for gas flow adjustment).

1) air hole closed (Safety flame used for when not in use or lighting).

2) air hole slightly open.

3) air hole half open.

4) air hole almost fully open (this is the roaring blue flame).