Laser-Induced Color Marking of Titanium: A Modeling Study of the Interference Effect and the Impact of Protective Coating

Figure 6

The 2D spaces of the color difference depending on the oxide thickness and the thickness of the protective layer with reference to six (a–e) examined colors. The white regions indicate the value below 7 for the corresponding, mirrored color maps in each (a–e) case.

(a) (nm), yellow  

(b) (nm), orange  

(c) (nm), red  

(d) (nm), purple  

(e) (nm), blue  

(f) (nm), I. blue