Original sentence: A Chinese book of 1044 AD (described in the section below) was the first to record saltpeter explosives including sulfur and charcoal, although many other ingredients were included in the mixture.Detonation - this stage is when the nitrate content of a gunpowder solution has reached the level of 'modern gunpowder', meaning the proportion of saltpetre, sulfur, and charcoal follow the ratio of 75:15:10 respectively, and are the sole ingredients of the formula.Such mixtures were created in China by the 12th century.This is the turning point from which proto-gunpowder turns into mixtures he calls "true gunpowder"
Edited sentence: A Chinese book of 1044 AD (described in the section below) was the first to record gunpowder solutions including the use of saltpetre, sulfur, and charcoal, although other ingredients were included in the mixture.As seen in the following sections, this mixture was created in China by the 12th century, and written of later by Roger Bacon in 1267.Detonation - this final stage is when the nitrate content of a gunpowder solution has reached the level of 'modern gunpowder', meaning the proportion of saltpetre, sulfur, and charcoal follow the ratio of 75:15:10 respectively, and are the sole ingredients of the formula.This is the turning point from which proto-gunpowder turns into true gunpowder, and finally possesses the propellant potential to launch rockets