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    Rights: The University of Waikato
    Published 3 November 2009 Referencing Hub media
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    This video compares the burning of a synthetic sofa with the burning of a sofa that has fire-retardant features - It has a woollen fabric covering and contains combustion-modified foam (foam with chemical fire retardants).

    Points of interest

    • At about 1 minute 20 seconds, what do you notice about the way the two fires are burning?
    • How long did it take the synthetic sofa to be completely engulfed in flames? Compare that to the other sofa.