Fireworks Gunpowder History(Ⅱ)

The so-called "black powder a resplendent pearl, in chinese civilization to the three parts even known from the earliest times.
Charcoal was already used at the Bronze Age in China and recognized as fuel for the reduction of metal ores.
Sulfur was recorded in the 6th century BC and in other documents it was regarded as remarkable for its ability to dissolve metals like gold , silver ,copper and iron. It is also featured in medicine.
There is considerable evidence of the existence and knowledge of Saltpeter . Once again, its reactivity with metals its use in medicine in the elixir of life recipe established its importance in these times.
It has always been stated that the origins of black powder are Chinese and much of the evidence has been found in books printed in the west . We are happily in the position now to have more authentic evidence from a document forwarded by professor Fe n g Chang gen of the Beijing institute of the authors of the paper” The Origin and Development of Ancient Gunpowder” were Yang s h u o and Ding Jing(42).