Janoschka magazine Linked_V8_2023
The customer magazine by Janoschka and Linked2Brands.
The customer magazine by Janoschka and Linked2Brands.
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80<br />
t o t e l l t h e t r u t h<br />
issue #8 ©<br />
l i n k e d<br />
81<br />
GRAVURE<br />
CYLINDERS<br />
OF CELLS, SCREENS AND<br />
TONAL VALUES<br />
Gravure cylinders are printing tools onto which the printing image<br />
is engraved in the form of cells using a range of techniques.<br />
The cells hold the ink while the areas of the cylinder that are not<br />
engraved are wiped clean of ink by a doctor blade.<br />
2<br />
1<br />
1 Steel base<br />
2 Copper plating<br />
3 Chrome layer:<br />
improves the mechanical<br />
durability of the<br />
gravure cylinder<br />
3<br />
ELECTROMECHANICAL ENGRAVING<br />
A copper-plated cylinder base with a specially treated surface forms the<br />
basis for electromechanical engraving. Electromechanically engraved<br />
cylinders are used to produce large and always repeatable print runs.<br />
The copper layer is engraved with a diamond stylus. A digital repro file<br />
is converted into electrical pulses to control the diamond stylus.<br />
Diamond stylus<br />
IMAGING SPEED<br />
8000 CELLS/ SEC.<br />
5%<br />
5% 50% 100%<br />
LIGHTS<br />
Impression roller<br />
4 Cells = image areas<br />
5 Cell walls / non image areas<br />
Copper layer<br />
50%<br />
MID TONES<br />
Substrate<br />
Doctor blade<br />
Printing cylinder<br />
5 4<br />
Electromechanically engraved cells can have<br />
different sizes and depths.<br />
The deeper the engraving, the larger the cells<br />
and the darker the tonal value.<br />
100%<br />
FULL TONES<br />
Ink trough
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