Compounding burning behaviour

For a number of materials the burning behaviour can be improved by the addition of bromine- or antimony compounds, mostly, however, at the cost of some mechanical or electrical properties. 

Evidence of the organic nature of the substance may, be provided by the behaviour of the compound when heated on porcelain or platinum or other comparatively inert metal (e.g., nickel) the substance is inflammable, burns with a more or less smoky flame, chars and leaves a black residue consisting largely of carbon (compare Ignition Test above). 

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