The opening and closing torque on lipsticks is tested using a Vortex-i PC-controlled torque testing system. The torque tester is fitted with custom designed adaptors to fit different sizes of lipsticks.  The Vortex-i is driven by Mecmesin's Emperor Torque software, which gives immediate indication of "Pass" or "Fail" for each type and size of lipstick.  Results can be seen in real-time and stored for future use.