What are the characteristics of Nobel's improved smokeless powder?

1879, Nobel started the research of smokeless powder in Sevrain-Livry laboratory on the outskirts of Paris. After eight years of experimental research, Nobel finally determined the formula: the same amount of nitroglycerin and soluble nitrocellulose, plus 10% camphor. Nobel named this new explosive: mixed smokeless powder, also known as "Nobel explosive", or "C.89". This smokeless explosive was patented in France for the first time. Nobel's last invention in the field of explosives, the so-called improved smokeless powder.