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
Rewari metal work the brass sheets, the basic shape of the product. Two dies are used for making the three basic pieces of tokni and dekchi; and one for making the only piece for parati. Heavy wood hammers are used in the initial stage and later on detailed finish is given by smaller metal hammers. Craftsmen wear hand and toe leather caps for protection. 2. Joining the joints: Borax powder, commonly known as suhaaga mixed in lukewarm water, for making a thick paste. The pieces to be joined are then placed edge to edge touching each other and this paste is applied on