When talking about offset machines, today’s high capacity requirements oblige to achieve the drying of inks and traditional lacquers on the machines.
The ink drying process implies two main equally important aspects.
The first main issue is the evaporation of the dilution products, the second one is the chemical reaction, which takes place as an oxidation of the pigments.
The choice of the dryer is determined by the composition of the inks and of the lacquers to be used.
Products not containing any water can be simply dried by an infrared dryer, while water-borne inks need some hot air in addition to the IR irradiation.
The short wave infrared dryer fast dry is equipped with an automatic switching on device for the lamps, which are activated by the sheets passing through. The system can also be partially switched on in case smaller formats are processed.
In this case the side lamps are switched off according to the paper sheet format, thus achieving a relevant energy saving.
The hot air dryer Fastdry is equipped with a heating coil, which feeds the air blades.
Both the air temperature and the air speed are adjustable to avoid turbulences and over-heating especially in case of very light sheets.
Both dryers are controlled by a user friendly touch panel.
Advantages:
• high capacity and elimination of the counter-print effect.
• possibility of building a high pile at the out-feed with a powder saving of more than 60%.
• higher brilliance in the printing result and cleaner working environment thanks to a minimum use of powder.
• reduced maintenance
Technical data:
HOT AIR DRYER
Format necessary Kw.
35x50 15
50x70 20
70x100 25
100x140 30
120x160 35
INFRARED DRYER
Format necessary Kw.
35x50 18
50x70 24
70x100 36
100x140 48
120x160 54
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