Grace Choi is the founder of Mink, a 3D makeup printing company that wants to teach the world how to stop buying cosmetics and start printing their own in any color. Choi created a how-to video and ...

In May, Grace Choi presented a startup at New York technology conference, TechCrunch Disrupt. Her idea seemed too good to be true. Her product, Mink, promised to help anyone easily 3D print their own ...