Pad printing is a printing method that involves transferring a design to a 3-dimensional object using a silicone pad. The process involves etching the design onto a metal plate and coating it with ink. Then, the pad is compressed onto the plate to pick up the ink, and finally onto the object to transfer the design. Pad printing is commonly used for printing on curved, irregular, or uneven surfaces, such as golf balls, pens, toys, and electronic devices. It is a popular printing technique for industrial manufacturers and promotional product companies.