I have to mark very very small (0.001 mm) permanent dot on steel specimen as a reference point.
Hi!
One possibility is to use micro hardness indents with a indentation force adjusted to the hardness of your sample!
Good luck!
Have you considered using a laser to etch the surface?
No sir, You mean laser engraving?
Yes, you could call the technique laser engraving. But I understand you only want a micron size dot.
Thanks sir. I want micron size dot only as a reference for measurement.
Thank you sir. I will see.
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