UV LED technology in detail
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Inkjet printers work with two different printing technologies : While a continuous inkjet dispenses permanent ink drops , the printer applies color only when needed with the drop-on-demand technology . BLUEMARK ID printing systems communicate with numerous small ink nozzles via tiny electrical pulses . This method conserves resources , can be implemented with solvent-free fluid , and results in a high-quality print image .
The printing method
The print head creates individual drops of ink and propels them in the direction of the marking material . The drops of printing fluid are applied in lines below the print head through the movement of the marking material . In the same step , UV radiation cures the fluid without a heating effect .
( 1 ) Printing fluid ( 2 ) Marking material ( 3 ) UV LED radiation
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The light source
A UV LED generates UVA radiation in precisely the relevant wavelength for the printing process . The LED technology enables the emitted light to be generated in a significantly narrower range than with traditional , energy-intensive UV lamps . This creates significantly less scattered light . In addition , the process releases hardly any heat .
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200 nm 280 nm
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450 nm 500 nm
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750 nm
1400 nm 3 µ m
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UV
The printing fluid
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The BLUEMARK ID printing systems use a printing fluid . It contains an initiator that reacts with the binder of the fluid when exposed to UV radiation . This creates polymers ( molecular chains ) that surround the color pigments and thereby cure the fluid .
( 1 ) Printing fluid ( 2 ) UV radiation ( 3 ) Polymers ( 4 ) Color pigments
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