2/18/2008 10:19:00 AM
About Bunsen Burner
A fuel-rich (cool) flame is yellow and sooty. An air-rich or fuel-lean (hot) flame is
much more desirable. This condition is indicated by a flame that has an inner pale blue
cone surrounded by an outer darker more translucent blue cone.
The hottest part of the flame is just above the top edge of the inner cone.
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