microglyph codes are well suitable for plastic surfaces, also material that shows little contrast after the marking process. Even delicate and hardly visible marks create robust and durable microglyph codes.
Many plastics show a color change when they are treated by a Nd:YAG Laser (laser-annealing). Other materials are better marked with shorter wavelengths, as for instance offered by frequency-multiplied solid-state Lasers. CO2 Lasers are used in general to create engraved marks, whereby no coloring effect is obtained.
Another commen method for microglyph marking on plastics is Inkjet printing, but also Dot-Peening is used.