Whatever the printing method used, UV inks are formulated from the following components:
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Component
|
Content
|
Principal functions
|
|
Oligomers
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40 - 50%
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Reactive substances that determine the principal properties of the ink (press stability, printability, resistance, etc)
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Pigments (organic or mineral)
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15 – 20%
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Colouring materials chosen as a function of the applications and fastenesses required.
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Monomers
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5 – 20%
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Reactive diluents enabling the viscosity to be adjusted. They influence the final properties of the ink film.
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|
Photoinitiators
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5 – 12%
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UV radiation sensitive constituents, which initiate the polymerisation reaction of the ink film.
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Additives
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1 – 8%
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Products that influence specific properties, such as the rheology, adhesion, rub resistance, etc.
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UV inks do not contain any volatile materials. Unlike conventional inks, 100% of the ink deposited on the substrate remains in the dry ink film.
Typical UV ink formulation
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