Tirrell burner

When the alcohol has burned off, a very hot flame (Tirrell burner) is directed at the drop of water on the under side of the egg and.after sufficient heating a piece of the egg shell from 1 to 2 cm. in diameter snaps off. In some cases the vitelline membrane is broken at this point and the contents of the egg run out, so it is necessary to have a container ready for use. 

A strip of the test material is held vertically in air and ignited from the bottom with a Tirrell burner using a set procedure. 

The sample material is tested in air in the form of strips held with their longitudinal axis horizontal and their transverse axis at 45° to the horizontal. The sample is ignited at one end with a Tirrell burner and the rate and extent of burning is reported. 

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