In a move at the limits of commercial technology, beauty business L’Oreal USA is pushing to 3-D print skin. The work has huge implications. Most obviously, it will enable L’Oreal to lab test the safety and performance of cosmetic products on 3-D bio printed skin. The result will be much more affordable, quickly and easily tested products, throughout the design process, instead of needing to assess their reaction with real bodies or hair before the final stages of testing. Problems with products in development that are beginning to cause failure will be identified earlier.