According to NPD Group, color is the main factor influencing nail purchases. • According to global information provider The NPD Group’s March 2013 Nail Care and Polish Consumer Report, more than half of women (age 18+) have purchased nail products for at-home use or professional nail services in the past year. Color is the main factor influencing purchases, with more than 60% of nail product/service buyers reporting that as long as they get the color they want, they do not pay attention to th...