EVALUATION OF NEW PHOTOFLASH FORMULATIONS.
PICATINNY ARSENAL DOVER N J PYROTECHNICS LAB
Pagination or Media Count:
Photoflash sysems containing hafnium and potassium perchlorate in stoichiometric 7228, fuel rich 7723, 8218, and calculated maximum efficiency 8713 proportions generally exhibit greater luminous efficiency on a volume basis candleseconds per cubic centimeter then the conventional 6040 potassium perchloratealuminum and Type 3, Class A photoflash formulations under either ambient conditions or reduced pressure conditions simulating an 80,000-foot altitude. With increased hafnium content, greater integral light and volumetric efficiency values are obtained under either ambient or high altitude conditions. Under reduced pressure conditions, the stoichiometric hafniumpotassium perchlorate system and a ternary blend of hafniumpotassium perchloratebarium nitrate 721414 gave superior peak light intensity values when compared with the above conventional formulations as well as the optimum high altitude flash system of 8020 calciumpotassium perchlorate. Author