Mint-made errors are called "type-2 blanks (or planchets)" after an upending mill adds uniform, rounded rims. Type-2 blanks may also be considered striking errors as they are prepared correctly, but are released without having been struck. A misfeed can occur when the metal strip is fed through the blanking machine. The punches sometimes overlap the leading edge of the metal producing a straight clip. Sometimes, the punches strike an area of the strip which overlaps the hole left by the previous strike producing a curved clip. Sometimes punches strike the irregular trailing edge of the metal strip producing irregular clips. Coins are
Metal Couture Because of the size of the pieces, they are generally not made of precious metal as jewellery would be, as this would make them prohibitively expensive. Various types of Metal are used for making metal couture, including steel, stainless steel, copper, aluminium, but may include other materials. Metal couture was first featured in fashion shows in the early 2000s, in both mainstream, high-end couture and Alternative fashion/subcultural fashion shows. Some Metal Couture has featured in product promotional photography, stage shows, art installations and the catwa lk. Other items have featured in film stage and in the video clips of performers,