The black powder is produced with using saltpeter, and that saltpeter is a reason for smoke to appear in barrel after discharging projectile. Nowadays the black powder is produced like grain-likes and those grains are of irregular shape.
There are some characteristics that determine a knife or other stuff like the cold steel. First of all it is important for blade of knife to be no less than 90mm. The thickness of blade has to be no less than 2,5mm.
It is another stage of development of weapon. People invented weapon that is of such destructive potential that will strike great number of living creatures with one hit. What is the most dangerous feature of mass destruction weapon is that destructive components of it are of such kind that will result into long-lasting destruction after the hit.
The modern countries have a number of different mass destruction weapons that are adopted. According to their nature and functions there are four types of mass destruction weapons. There are chemical mass destruction weapons, biological, nuclear and combusting mass destructive weapons. Those kinds are of different functions, destructive potential and useful life.
The destructive potential of chemical mass destructive weapons is based on toxic components of poisoning nature. Scientists invent certain chemical components and base manufacturing of chemical weapon on it. it will be right to say than among all other kinds of mass destruction weapons this kind is one of the longest useful life time.
Though, there are also bioweapon of mass destruction and its useful life is also great. The destructive potential of bioweapon depends on biological stuff that injuries health of human beings. This weapon may be represented as some kind of vaccine or else. It is also possible that water is being infected with some virus that penetrates to humans' organism with that water and kills them slowly.