In Workshop, We have 2 Machines for watch dial printing. one is flat, we called it silk printing, it is done by film. 80% dial printing by this way. but we have some designs some positions which is not flat surface, then we can't use Silk printing for it. then second machine comes, it called PAD printing. which is done by steel PAD. not by film. yes, it is mainly made for watch parts Chapter ring or rehaut, which is slant for minuter markers or Tachymeter markers. or some special designs. you see clever people create the machines for any occasion. of course, we also use the PAD printer for other printing as well. such as inside Watch case and watch bezel.
Please see below video to check how to print it. of course, before start, we adjust it a while to a perfect position.