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UV curing

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UV curing (In French séchage sous UV) application of the short-wave invisible range of optical radiation for drying printing inks, inkjet inks and varnishes (hardening of the layers); UV-C (280 to 100 nm) starts the radically or cationically induced crosslinking reaction by splitting up the photoinitiators, UV-B (315 to 280 nm) maintains the radical polymerization, UV-A (380 to 315 nm) penetrates thick layers. UV inks are preferably printed on smooth, non-absorbing surfaces (plastics, metalized substrates) and are available for all printing processes, especially in the printing of packaging (folding boxes, foils), labels (self-adhesive, in-mold labels), plastic cards and so on.