Text and picture labels may be printed on the surface of the PCB using screen printing. Screen print is also known as the silkscreen.
For saving the PCB production setup fee and fabrication fee and shipping fee, White SilkScreen is the most economic selection, and the other colors will cost more.
For the silkscreen words printed clearly on the PCBs, the minimum word height should be at least 27.6mil (0.7mm).