The plastic socket, from an automotive assembly, shown in the photo to the left produced an engraved mark with some contrast. The beam from a 10W Synrad laser was steered with an FH Series marking head and focused through a 200 mm FH lens (290 micron spot / 5mm depth of field). The 0.25"-high date code was marked at a speed of 10 inches per second in a cycle time of 0.33 seconds.
This plastic socket was marked with a simple date code using 10W.