Pre-Installation Installation Training
A70622-D1
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Laser beam effects
For optimum results the Laser beam has to be absorbed in the top few microns of the
material surface, so that sufficient energy density is produced to modify the surface by one of
the following three processes:
Coating removal (Ablation)
The Laser is absorbed by the surface coating and
vaporizes it to reveal a contrasting substrate. The contrast
level is given by the contrast between the top layer and
the bottom layer (Inked paper, coated metals).
Etching (Engraving)
The Laser vaporizes material from the surface of the
substrate without producing any color change (this is the
process which occurs in the laser marking of PET). The
resulting mark looks similar to an embossed print. Most of
time the contrast level is poor, the laser beam doesn’t
create any color change (Most of plastics, glass)
Thermo chemical
The laser changes the material by heating it to a
sufficiently high temperature to break molecular bonds.
The new material formed by this process may have a
different color, thus producing a discernible mark.
The substrate reacts by generating a colored mark. The
contrast will depend on the color difference between the
generated mark and the raw material.
(PVC, pigmented or pearlized plastics)
Inked paper
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