Thermal characterization of pyrotechnic flash compositions by DSC showed multiple exotherms around 170℃ and 350℃. The flash composition based upon potassium perchlorate/sulphur/aluminum and barium nitrate/sulphur/aluminum was found to be hazardous due to its secondary exothermic reaction with high energy release. The pyrotechnic flash compositions consisting of aluminum as a fuel showed a good cracking characteristics compared to other fuels like magnesium or charcoal. In all the compositions studied, the variation of sulphur concentration in a mixture showed a significant influence in inducing an exothermic reaction. Hence, proper care should be taken in use of sulphur concentration in a mixture during manufacturing.
fireworks, thermal hazards, DSC, flash composition, exothermic reaction.