Why do UV inks and coatings have a strong odor after curing?

This is a stigma from the past. The post-cure odor of the past was associated with the photo-initiator used to effect the polymerization of the monomers and oligimers in the UV chemistry. Current photo-initiators used in UV chemistries have little to no post-cure odor.

Again, the post-cure odor is history and no longer present with newer photo-initiators. More.

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