Offset printing is done using printing plates in Sata. Metal plates for printing are made of aluminum and they are thin and flexible. Polyester plates are also used for printing and they are cheaper and lighter in weight than the metal plates. In presses the plates are attached to the printing cylinder. Various kinds of disposable and longer capacity plates are available in the market. These plates are used to print newspapers, product packaging, magazines and advertisements on papers or other materials. These plates are available in different shapes and sizes depending on the purpose. The texture of the plates also varies.