Autumn Forests are Colorful…
…and laser markings can also be: Colored annealing marking is when an oxide layer is created on ferrous metal (iron, steel, stainless steel) or titanium through local heating.
The created color depends, among other things, on the temperature that is achieved on the lasered surface.
The surface remains even, because there is no material removal but a colorchange only. The created marks are highly resistant to friction.