The relationship between the pressure of pyrotechnic agents and the density of charges is the basic performance parameters for the research and design of charge density, charge amount and detonation characteristics of pyrotechnics. In this experiment, the relationship between the pressure pressure and the charge density of Lead styphnate and carboxymethyl cellulose barium styphnate with two charge diameters of 3.4mm and 4.7mm was studied by volumetric method, and the fitting formulas and relationship curves between the pressure pressure and the charge density were obtained, and the relationship between the porosity of the two charges and the pressure was obtained. 

Lead Stephenate, Carboxymethylcellulose, Barium Stephenate, Charge Density, Pressure