In an interview with Tech Insider, Sharma estimates that a diesel vehicle engine would only take an hour to produce enough soot to fill an ink cartridge.
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"With a little bit of research," he said, "it can become as good as the printing ink HP sells to you."
Sharma writes on his website that his creation was inspired by life in his home country, India.
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While traveling in a stuffy taxi, Sharma noticed that his skin was turning black from all of the soot in the air that had collected on his sweaty skin.
This article originally appeared on Discovery's DSCOVRD blog.