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 dug in the ground to keep the water more cool. The basic raw materials used in the practicing of the craft are brass and copper sheets. Other than this to join the shaped pieces of various utensils soldering materials "suhaga" (it is a mixture of borax and water used to join metal pieces), brass, copper and zinc are used. Industries mainly copper & brass rolling mills are continuously producing best quality coils, strips, sheets, plates, and circles by the hot rolling and cold rolling methods. There are many manufacturers associated with copper and brass. Another process that involves washing of