A 37-year veteran of the nail industry, Lin Halpern may not be someone whose name you know, but surely you’ve run across at least one of the products she’s had a direct hand in developing. An inventor’s daughter, Halpern became an outside consultant to NSI in 1989. For the past 10 years she has worked with a group of chemist, melding their chemical knowledge with her technical know-how to invent and co-develop professional nail products. From heat-activated polish sealers to French manicure drill bits, from NSI’s Simplicite French Fin Tip to Line-Out, Halpern’s hand is apparent.