How does laser marking machine make black effect on stainless steel plate

We know that we can use fiber laser marking machine to mark LOGO and lettering on stainless steel, but is it possible to make black effect on stainless steel?
Today, our cllase-technology introduces you how to use fiber laser marking machine to make black effect on stainless steel:

1. The first thing to adjust is the focal length. Generally speaking, a machine with a power of 20W needs to reduce the focal length to 1-2mm lower than the normal value.
2. Adjust the software parameters, fill the content to be marked line by line, set the filling spacing to 0.01mm, increase the power as much as possible, and reduce the speed to about 100mm/s. Of course, if you want to be faster, you can, but the best Do not exceed 200mm/s, generally speaking, the faster the speed, the lighter the color
3. The frequency does not need to be changed, just keep the commonly used frequency value.
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