Pad printing is a printing process that enables the precise decoration of a wide range of shapes, materials, and surface textures. The print image is etched as a fine depression into a plate known as the cliché. During the printing process, ink is applied to the cliché, filling the depressions of the image. Excess ink is removed using a ring-shaped or straight doctor blade, leaving ink only in the etched areas. A silicone rubber pad—giving the process its name—is then used to pick up the ink from the cliché. The pad moves to the object to be printed and transfers the ink accurately onto its surface. The key advantage of pad printing lies in the flexibility of the pad during the transfer process, which allows for reliable printing on uneven or complex surfaces. The process enables the reproduction of very fine details without the need for halftoning, as the exact color is applied directly. This results in excellent print quality, as required, for example, in the watchmaking industry—where pad printing originated. Further information can be found in our pad printing book.
Pad printing in medical technology is usually carried out under cleanroom conditions. In addition to plastic components such as syringes, device housings, fixators, and microtiter plates, flexible stoma bags and catheters are also printed.
The automotive industry places various demands on pad printing with parts such as Isofix, fuel filler caps, engine covers, wheel rims and backlit dashboards. Error prevention is essential here.
The watch industry is the original sector of pad printing. Watch parts such as dials, complications and glass backs are finished with it. Precise machines are essential to guarantee high quality.
The printing of plastic parts is the main application of pad printing. The trend is moving towards direct printing at the injection molding machine, with part handling directly managed by the unloading robot.