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Randy Atkins: Solid colored bubbles were thought to be practically impossible.
Tim Kehoe: The bubble wall is so thin that most scientists will tell you that you can't get any visible color to show up.
Randy Atkins: But Tim Kehoe, a Minnesota inventor, tried anyway. At first his colors just formed a dot at the bubble's bottom. When he finally found a dye that worked, it stained. Then he found...
Tim Kehoe: ...something I'd spent eight years trying to make washable wasn't going to be good enough. They had to disappear.
Randy Atkins: So Kehoe finally hired a dye chemist who engineered brand new bubble-coloring chemicals that can vanish when they pop.
Tim Kehoe: And we have control over that. So they can fade in ten seconds or two hours.
Randy Atkins: Other potential applications range from timed toothbrushing to temporary spray paint. With the National Academy of Engineering, Randy Atkins, WTOP Radio.
Colored bubbles should be available in toy stores within a year. To find out more about this story, go to wtopnews.com and click on "Innovative Engineering" under "Quick Links" at the very bottom of the page.