How UV Works On Metal Medal Printing | Axis Enterprises ~ 88721-88721

Описание: Learn more about UV metal Medal printing processes and UV metal UV printers on http://uvprinterindia.com. Watch Complete Video For Metal Printing Process with UV Ink.

Printing UV Inks on Metal

The most successful inks currently used for coated-metal decorating are solvent based. Increasingly, UV inks are being used, but they are just a small part of the market. Why is this so? To answer this question, Please Read Below

UV printing has one system, cationic, that exhibits very little shrinkage, but is slow curing and based on cycloaliphatic epoxies. The inks are susceptible to blocking if not cured properly. Since little shrinkage is involved, the cationic ink system tends to adhere better to the thermoses-coated metals than the free-radical systems. Cat-ionic inks continue to cure over long periods of time, however, and care must be taken to prevent inter coat adhesion problems.


A free-radical UV ink, on the other hand, reacts rapidly during the curing cycle, cools quickly, and shrinks on a surface that is hard and non shrinking, such as thermoses-coated metal. This could cause a loss of adhesion The reason is that free-radical UV inks are cured in a UV-curing unit in seconds. The metal and coating are not affected--they don't heat up so they neither expand nor shrink, and the substrate surface remains hard. The UV ink deposit, however, shrinks very rapidly. This puts stress on the adhesion of the ink to the substrate, to the point that the ink film may pop off the coated metal.

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