Abstract
Laser marking is a widely-used in industry owing to its process flexibility. Color laser marking is an
interesting and smart material treatment method for producing permanent surface marking. It can
contribute to increasing marked information, against counterfeiting, and so on. It originated by structural
colors induced by formation of metal oxide layer with controlled thickness. This method is mainly
applied to stainless steel or titanium. In addition to this, the method based on the formation of laserinduced
periodic surface structure has been developed. Combination with other functionality such as
super hydrophobicity are in progress.
