How to Hack an Inkjet to Print Custom-Colored Makeup

After graduating from Harvard, Grace Choi decided that she wanted to target the makeup industry with a low-cost device that would actually let consumers simply print their own. And while she's working on perfecting (and raising the needed funding) to put her Mink printer into production, she's created a tutorial on … » 9/22/14 5:30pm 9/22/14 5:30pm