Using ordinary fiber laser marking machine can mark white words, but also need to distinguish materials, many pvc, pp materials, and metal materials, are all possible.
Stainless steel material
Modify the parameters in the marking software ezcad, set the marking power to 50 and the speed to 1500. If the effect is not obvious, you can reduce the speed appropriately.
The speed can be set to 600 and the power is 10, so that white text can be marked on the plastic material.
This can be set at will, without too much adjustment, you can use laser marker for white text.
If you want to mark color on stainless steel, you can use mopa laser marking machine.