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What is Improved Black Powder Composition about?

This patent from 1932 describes an improved black powder composition that slows the rate of combustion. Specifically, it incorporates a small percentage (0.1-5%) of a water-soluble or water-emulsifiable oil as an ingredient. This allows the oil to be directly emulsified with water without additional emulsifying agents. When tested, a black powder composition containing 0.5% of a water-emulsifiable oil burned 57 seconds for one foot, compared to 42 seconds for an identical composition without the oil. The wa

Author

erwer

Language

EN