The term 'black powder' can refer to a number of different things. It is mostly used to describe gunpowder, which is used in weapons, explosives and the like.
Charcoal and saltpeter (if you mean black powder)
Dixie's a powder. I'm sure you have heard the term "take a powder'
The term is a black POWDER gun- meaning it shoots back gunpowder, and not smokeless powder. Some were patented, some still are. Patent- not Patton.
The marking of the nickel steel barrel meant that the rifle could be fired with smokeless powder.This powder created more pressure than black powder.
the darkest black
Back when the round was powered by black powder, the "20" meant the amount in grains of the powder charge.
Answeryes, a muzzle loader and black powder are just two different names for the same thing.Black powder is a term that also includes a category of guns that fire black powder cartridges. So these guns were breech loaders and do not load from the muzzle. Also the early black powder revolvers were loaded by ramming the charge into the cylinders---not the muzzle. These could also be referred to as black powder pistols and not muzzle loaders.I just call them "smoke poles" myself.Also, the early Colt pistols fired black powder and a ball. These are called "black powder pistols" or "cap and ball pistols". If I was referring to shooting a Colt, I would say I shoot a black powder gun; I would not refer to it as a muzzle-loader.
Black powder absorbs moisture from the atmosphere
Manganese dioxide (MnO2) is a black powder.
Pour poudre vives means it was made for smokeless powder (not for black powder, in other words it was made after smokeless powder came into common use).
Black powder is much weaker than smokeless powder. Smokeless powder, for this reason, once invented(much after black powder), replaced black powder in guns. However, black powder is still used in fireworks because the extreme explosive power of smokeless powder would prove too dangerous in fireworks.
Powder coating is the most durable colouring process on the market and aids in resistance to rust and wather damage.