The Nail Polish Adhesion Rig and method have been developed by Stable Micro Systems to provide the solution to this assessment requirement.
During the polish drying time test, a channel 20cm long is filled with polish to a depth of 0.5 mm and wiped level using a glass rod.
At this point a timer within the Exponent software test sequence is started. This depth is representative of a typical coat of polish on a fingernail; a depth of 0.5mm dries to approximately 0.2mm. This channel is seated on top of the Adhesive Indexing System that has ten detents and so ten test sites are available by simply sliding the platform along.