Let’s test thermoplastic paint! Thermoplastic paint is used for lane markings and more on roads. But who decides if the paint is acceptable? ADOT’s Chem Lab tests every single batch of manufacturer thermoplastic paint to ensure it meets reflectivity standards and has a certain percentage of other ingredients, such as binder and pigment. For example, white paint must have at least 40% glass beads, 20% binder content and a yellowness index of less than 0.12. Yellow paint must have at least 20% bin