Flexo: UV inks (UV)

UV inks are particularly used in flexographic printing to plastics and metal complexes due to their characteristic of having becoming an instant drying the liquid into a solid inks, thus avoiding problems such as repainting and providing greater physical resistance and chemical.

COMPOSITION OF UV INKS
• pigments
• monomers
• oligomers
• photoinitiators (radicalic and cationic)
• additives

CLASSIFICATION OF UV INKS
Depending on the type of photoinitiator using, Water Based Flexo Ink in India can be divided into radicalic or cationic.
• Radicalic: the polymerization process continues even turning off the light until they solidify, are the most used.
• Cationic: need of UV light at different stages to dry or polymerize, the process ends when the fold of UV light.

To lower the intensity in these inks varnish is used.

PROCESS polymerization of UV inks ( Water Based Flexo Ink in India )

Oligomers combined with the monomers forming the binder or ink vehicle, ie tranport serve pigments. As we already know,UV inks are formed by the above components more photoinitiators and possible additives, when these photoinitiators react to UV light polymerization reaction, thus activates the binder (oligomers and monomers) harden forming a solid ink film and dried.