The 500 Series are copper clad laminates consisting of continuous woven glass cloth impregnated with epoxy resin. Compared to a 2 oz. copper clad board, 1oz. boards contain less copper making the etching process much quicker. They are made of FR4, which is a flame retardant version of G-10 material.These boards are ideal for prototyping and small production runs. They require only an anti-etching pcb pen and copper etchant. They can easily be used by PCB manufacturers, design engineers, hobbyists, and students.We also offer 0.5 oz./ft2 Copper Clad Board.