Although the chemical properties of sheet molding compound (SMC) are similar to those of bulk molding compound (BMC), the manufacturing process is quite different. SMC is made into a sheet shape, so it is easier to be used in various fields, and its mechanical strength is much more prominent than its thermoset family counterparts. SMC usually contains 10-65% fiber-reinforced material, which is composed of strips of chopped glass fibers ranging in length from 1/2 to 2 inches (or 12.7 to 50.8 mm).