Sides are recut for various reasons. Record stampers could only be used to make a limited number of copies before they became worn, and a new cut was required. As of the early 1980s, this was no longer true. Changes to master disc manufacturing methods, including the DMM or Direct Metal Mastering system, made it possible to make many copies of a master cut non-destructively, so a recut was no longer necessary when the plate used for pressing became worn. Stampers can also become damaged from handling. Recuts can also be made when there is a problem with the previous cut, for example, a technical fault or improper banding (the visual separation between songs). When a new cut is made, several copies called "test pressings" are made for technicians (and, for a new record, the producer and the recording artist) to review the cut, and determine if it should be accepted or rejected. If it is rejected, another cut must be made.