蜡烛燃烧时,用真空泵吸走周围的空气,令黑色的炭物质——即燃烧产物——与其余空气分开.接下来,黑灰聚焦到一个小隔间,加入酒精——此例中用伏特加——和一滴橄榄油.
Lastly, the newly formed liquid can be injected into an ordinary ink cartridge for everyday use.
最后,混合而成的液体就能放到普通墨盒中每日使用了.
Sharma admits the black could still be blacker. Since it was designed as a research project, Kaala would also need to hold up against formal toxicity standards before it can hit the market.
夏尔马承认墨水还可以更黑.但这只是个研究项目,投入市场前,Kaala也得满足正式的无毒标准.
"With a little bit of research," he says, "it can become as good as the printing ink HP sells to you."
他说："只需再研究研究,它就能跟惠普（HP）卖的打印墨一样好了."
Sharma estimates a 4-year-old diesel engine could produce enough carbon to fill an HP cartridge within 60 minutes. A chimney would take only 10 minutes approximately.
夏尔马估计一个使用了四年的柴油内燃机60分钟内产生的炭能填满一个惠普墨盒.一个烟囱大约只需要10分钟.
Recreating that ink wouldn't take much effort.
制造这种墨并不费事.
"Usually, people don't know about this, but the ink you're buying is nothing," he says. "It's just carbon black mixed with a few chemicals, and that's all. If you're making your own ink, the cost would definitely be much, much lower."
"一般来说,人们不了解这点,不过大家买的墨真没什么特殊的,"他说,"炭黑掺些化学品就制出来了,就这些.如果自己制墨,成本绝对非常非常低."
Sharma hopes that his handheld device could scale to a size that sits on par with leading carbon-capture systems: huge walls of fans that trap carbon lurking in the air.
夏尔马希望他的手持装置再大点,能用到主流炭捕集系统上：比如捕集空气中隐藏的炭的巨型风扇墙.
