This MG Chemicals 500 series prototyping board is a translucent laminate for making printed circuit boards (PCB) by transferring artwork from a transparency using exposure to light followed by developing and etching. It has a fiberglass (FR4) substrate impregnated with epoxy resin for rigidity and resistance to flame with 1 ounce of copper per square foot (1.34 mm thick) for light to moderate current. The material blocks ultraviolet light for protection during automated optical inspection (AOI). It complies with Underwriters Laboratories (UL) #E214381 for materials used in the fabrication of printed wiring boards and is Restriction of Hazardous Substances (RoHS) compliant. This PCB laminate is suitable for prototypes small production runs and student training.MG Chemicals manufactures chemical products for the electronics industry. The company founded in 1955 and headquartered in Surrey BC Canada meets International Organization for Standardization (ISO) standard 9001.