A theory is presented on the ignition of solid composi¬tions. The effect of certain physical, chemical and thermal properties of a solid composition on the ignition time and ignition energy is explained and supported by experimental evidence.nDifferent types of ignition systems are described. Problem areas of the normal ignition systems are discussed and a technique to overcome these problem areas is offered.nBy use of the developed ignition theory and a hot-bath immersion test apparatus, a technique of determining the true ignition temperature of a composition is described.
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