Laser marking article and laser marking method
First Claim
1. A laser marking article having a surface having two or more overlapping layers thereon, one of said at least two layers being an outermost layer with respect to said surface, wherein one of said at least two layers other than said outermost layer is a film made of a laser marking ground composition consisting essentially of a laser beam-absorbing whitish inorganic compound powder and a binder.
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Abstract
The present invention relates to a laser marking article having two or more layers of thin films on the surface thereof, wherein one of the layers other than the outermost layer is a thin film made of a laser marking ground composition containing a laser beam-absorbing whitish inorganic compound powder and a binder as essential ingredients, and to a laser marking method comprising irradiating said laser marking article with a laser beam.
According to the present invention, a vivid white-colored mark can be formed on the surface of an article even in case of low-energy laser irradiation or even in case of high-speed marking.
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8 Claims
- 1. A laser marking article having a surface having two or more overlapping layers thereon, one of said at least two layers being an outermost layer with respect to said surface, wherein one of said at least two layers other than said outermost layer is a film made of a laser marking ground composition consisting essentially of a laser beam-absorbing whitish inorganic compound powder and a binder.
Specification