Highlights?Colored powders, used in events such as The Color Run, can ignite and explode.?Such fires easily lead to mass casualty events.?Ultrasonically dispersed colored water mists are a non-explosive substitute.?Known risks of colored powders and water mists are discussed.AbstractColored powders such as colored corn starch are used in events such as The Color Run to blanket the air and surroundings with decorative color. Their use, however, presents a risk of dust explosion. The fact that such powders are used at events drawing large crowds makes any fire or explosion likely to result in a mass casualty incident. For instance, the Formosa Fun Coast explosion on June 27, 2015, resulted in multiple deaths and injuries. Development of alternatives to flammable/explosive colored powders would eliminate this hazard. We demonstrate as a proof-of-concept that an ultrasonically driven water mist can produce effects similar to those created by colored powders. Food coloring was dissolved in water, and the colored water was subsequently dispersed from various ultrasonic devices and photographed. Colored clouds were formed from the colored water. Colored clouds were visible under various conditions, and color combinations were possible. Possible risks of colored corn starch and water mists are discussed. An ultrasonic misting system is capable of safely replacing colored powders with regard to appearance.展开▼
机译：突出显示 ？ 在诸如“ Color Run”之类的事件中使用的彩色粉末会着火并爆炸。 < ce：list-item id =“ lsti0010”> ？ 此类火灾很容易导致人员伤亡。 ？ 超声分散的彩色水雾是一种非爆炸性替代物。 ？ 有色粉末和水雾的已知风险讨论过。 摘要 在诸如The Color Run之类的活动中使用有色粉末（例如有色玉米淀粉）将装饰性色彩覆盖在空气和周围环境中。但是，使用它们存在粉尘爆炸的危险。在大量人群中使用此类粉末的事实使任何火灾或爆炸都可能导致人员伤亡事故。例如，2015年6月27日发生的福尔摩沙欢乐海岸爆炸案导致多人死亡和受伤。开发可燃/易爆有色粉末的替代品将消除这种危害。作为概念验证，我们证明了超声波驱动的水雾可以产生与有色粉末相似的效果。将食用色素溶解在水中，然后将有色水从各种超声波装置中分散并照相。由有色水形成有色云。在各种条件下都可以看到彩色的云，并且可以进行颜色组合。讨论了有色玉米淀粉和水雾的可能风险。超声波雾化系统能够安全地替换外观上的有色粉末。
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