Printing Competence

15 Properties of UV curing: Time: The cross-linking that takes place in a split second allows immediate quality control and processing of the product. Energy and environment: UV cured coatings are usually 100% solvent-free systems which do not need a drying oven or VOC disposal. Quality: Due to chemical polymerization, high-quality coatings are created that are characterized by high chemical resis- tance and the best surface properties, such as exceptional scratch-resistance. Gloss: Extremely high degrees of gloss of up to 95 gloss units are typical for UV cured varnish systems. What can UV do? A brief summary of UV curing UV curing is the preferred drying technology for many printing and finishing areas. Conventional UV systems are based on medium-pressure lamps, which emit a significant spectrum with a high percentage in the UV range using high-voltage arc plasma.This radiation has the correct wavelength and energy to polymerize the photoinitiators and oligomers contained in the coatings into a three-dimensional network in a split second. The use of UV inks and varnishes has many advantages, the most obvious being the improved quality of the end product. Special effects, such as gloss (95 gloss units), matt, lenticular, changing, or holographic effects, together with a very high resistance to scratching, are achieved by the use of UV technology and finish the end product to a high standard.This applies not only to printed materials such as paper and cardboard,but also to sheets,aluminum coatings to mention a few. Further benefits for the printer: increased“pot life” of inks or varnishes, no spray powder – and the possibility to im- mediately process the product.This all makes UV printing efficient, low-maintenance, and guarantees the highest quality.

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