“…Podczas spalania powierzchnia ziarna nadal malała, lecz w miarę zbliżania się do niezflegmatyzowanego rdzenia ziarna rosła ży-wiołowość spalania się kolejnych warstw prochu, a co salts. Currently, chemical examination of diverse gunshot residues (known as chemical GSR, rarely performed unlike examination of metal micro traces) has become extremely useful (and very difficult, too), because apart from the aforementioned substances a number of other materials can sometimes be detected, such as hydrazine, silicates, dinitrohydroxydiazobenzene, nitroaminotetrazole, styphnate, dinitrobenzofuran, tetracene, tetrazine, diazodinitrophenol, dinitrobenzofuroxane, peroxides, sulphates, nitrocellulose, nitroglycerin, PETN, TNT, polyvinyl alcohol, polyvinyl acetate, guar, gum arabic, Prussian blue, glass, boron glass, hypophosphite, gelatin, thymol, cyanides, as well as ammonium, barium, calcium, strontium, zinc, zirconium, titanium, nickel, copper, bismuth, iron and aluminum ions [4,14,15].…”