LASER
TWO TONE©
The
Laser Two Tone has it´s fifteenth anniversary next month and
is marked by over
fifteen thousand roll installations world wide, which indicates the on
going
success of this unique cell structure.
BEL’S
laser methodology has opened up a new perspective for flexography. The
LTT
gives a predetermined volume of ink with double the number cells on the
Anilox
roller to the printing plate. The LTT therefore provides an even coat
weight of
ink with superior control for combination printing.
The
fundamental difference lies in the approach. The LTT rollers are laser
engraved
with a different cell formation to that of conventional methods. Two
different
cell sizes are engraved adjacent to each other with different depth and
surface
technology.
Within
this structure the ink transfer occurs unaided as a coating from the
cells. The
LTT laser engraving technique thereby makes use of the laws 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 engraving.
Two
Tone cells have a small and large cellular designed for consistent
beneficial
control of the ink flow to the plate. The roller has the ability to
carry
volume even when it is worn. Land around the cell doesn’t
increase as
dramatically than with the normal 60 degree cell engraving. As the
roller is
wearing, the unique structure carries on feeding the plate with ink
throughout
its life span, presenting generous superior qualities for longer.
As
the cell wall wears with a standard 60 degree angle engraving, the land
around
the cell gradually increases in size, making the cell smaller thus
reducing the
volume carried. Therefore the colour reduction may occur more quickly
than
expected resulting in modest amounts of density being applied to the
plate and
a significant reduction in print quality.
The
laser Two Tone is therefore, without doubt a far superior product
providing
advanced surface technology for combination printing.
-
Home
| Ceramic Rolls | Two Tone
| Sleeves and
Light Rollers
| Chrome Rolls | Glue and Doctor Rolls
| Nucleus Anilox
Roller | Bluebird Speed
Cleaning | NUCOAT | Laser Deposition | Contact |
|
