B.E.L’s established Anilox Alpha Laser
technology is the natural choice. High peak power and beam
quality, pulse widths in the range of a few tens of nanoseconds and
limited beam divergence. When laser engraving ceramics cells the Alpha
Range produces smooth walls, flat bottom and near zero taper allowing a
free flowing ink release from the Aniox Roller, for high quality flexo
printing.
Anilox LTT laser technology has
opened up a
new perspective for flexography. It gives a predetermined volume from
the Anilox Roller or Sleeve with double the number of cells to the
printing plate. Therefore providing an even coat
weight with superior control for combination printing.
The fundamental difference lies in the
approach. The Anilox LTT rollers are laser engraved with a different
cell
structure than in conventional methods. Two different size cells are
engraved adjacent to each other with different depth and surface
technology. In this formation the ink transfer occurs unaided as a
coating from the Anilox cells. The LTT laser engraving technique
thereby makes
use of the law of physics, which states that a large drop of ink has a
different surface tension to a smaller adjacent drop. This is where the
LTT strength lies. When the surface is covered evenly, the smaller ink
droplets flow more easily into the larger ones. This process does not
work as well when the droplets are the same size, as they are with the
regular 60 degree cell structure.
C02 LASER ENGRAVING as the name
suggests uses carbon dioxide, other gases, as in Helium (HE) and
Nitrogen (N2) are combined to generate the laser light or beam.
Specially made lenses to focus the beam, for the best engraving results
are essential, to maintain the geometric consistency of BEL’s
Laser Engraved Ceramic Anilox Rollers and Sleeves.
These
volumes can be achieved at 60, 45, and 30 degrees. All volumes shown
are maximum volumes but if required can be reduced by up to 50% with no
change in resolution.
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