Janoschka magazine Linked_V8_2023
The customer magazine by Janoschka and Linked2Brands.
The customer magazine by Janoschka and Linked2Brands.
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82 t o t e l l t h e t r u t h<br />
issue #8 © l i n k e d 83<br />
Dot screen<br />
ONE BEAM PER CELL<br />
Masterscreen technology<br />
SEVEN BEAMS PER CELL<br />
During printing of the different colours,<br />
different screen angles prevent the moiré effect.<br />
DIRECT LASER<br />
IMAGING<br />
Cylinders for direct laser imaging have a copper or zinc coating.<br />
In the direct laser system, image data is transferred via a<br />
laser beam directly onto the copper or zinc layer.<br />
Up to 70,000 cells can be laser-engraved per second.<br />
LASER ETCHING<br />
This technique also begins with a copper-plated cylinder. A coating of etching resist is applied<br />
to the cylinder to a thickness between 4 and 10 μm (depending on the etching depth).<br />
The resist protects the cylinder surface during the subsequent etching process.<br />
The desired motif is transferred to the coated cylinder by the laser ablating the paint coating<br />
in the image area. After the laser process, the cylinder is etched with ferric chloride.<br />
This only affects the areas where the resist was removed. It deepens and widens these<br />
areas to form cells. The paint coating is then removed from the whole cylinder before it is<br />
finally chrome-plated.<br />
Human hair<br />
ø~100µm<br />
Laser<br />
ENGRAVING SPEED<br />
70,000 CELLS/ SEC.<br />
Laser Etching<br />
1 2<br />
IRON(III)-CHLORIDE<br />
(Fe C l 3<br />
)<br />
Copper layer<br />
4-10 µm<br />
Etching resist<br />
Copper layer<br />
Masterscreen<br />
ø~35 µm<br />
Direct laser<br />
ø~10µm<br />
The cell geometry is completely variable. Lasered cylinders transfer<br />
the colour better, above all on difficult substrates like aluminium<br />
foil and uncoated paper, and guarantee excellent printing quality.<br />
The cell geometry can only be varied in size during etching.<br />
Cell geometric shape: square<br />
Imaging only on coating layer.<br />
Screening range: normally from 70 to 120 screens<br />
Wide range of screen types, e.g. cushion, hexagon or special.<br />
3<br />
CHROME LAYER<br />
(Cr )<br />
Exposition laser<br />
ø~2µm