You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Blackening around the entry wound of a firearm injury is due to? and explain in detail?
Smoke REF: Parikh 6th edition page 4.44 The soot or blackening is due to fine carbon paicles around the shot hole and can be readily wiped off the skin. The soot or blackening is due to smoke of black gunpowder and is comparatively less if smokeless powder is used. Note: Tattooing is due to both burnt and unburnt gunpowder