The first of the modern printing methods is flat-bed screen printing. In the textile industry, this process is an automated version of the older hand operated silk screen printing. For garments such as t-shirts, sweatshirts, sweatpants, and caps, the hand-operated process is often used. For each color in the print design, a separate screen must be constructed or engraved. If the design has four colors, then four separate screens must be engraved. The modern flat-bed screen printing machine consists of an in-feed device, a glue trough, a rotating continuous flat rubber blanket, flat-bed print table harnesses to lift and lower the flat screens, and a double-blade squeegee trough.