 Typical pyrotechnic payloads of this type resemble whistling compositions and are often made up from potassium perchlorate and hydrogen lean organic fuels.Other spectrally balanced payloads are made up similarly as double base propellants and contain nitrocellulose (NC), and other esters of nitric acid  or nitro compounds as oxidizers such as e.g.hexanitroethane and nitro compounds and nitramines as high energy fuels.