Pad Printing is the process where an inked image is transferred via a photo-etched plate to a thick, soft silicone pad.
The pad is then pressed against the object. The pad can wrap itself as much as 180° around a small object, and ink coverage is excellent. One colour is done at a time, but registration between colours is good enough to allow four-colour process printing.
Pad printing is mostly used for printing onto corporate gifts like pens, golf balls, mugs etc.