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How do they work?

UV curable acrylics are normally composed of monomers and polymers that contain similar vinyl groups, thus sharing an acrylate functionality. In addition to this, a photoinitiator is added, which remains stable until a predetermined frequency of UV light is introduced. On exposure, the light frequency causes the photoinitiator to decompose, which in turn produces free radicals which react with the carbon molecules of the acrylates, polymerize, and ultimately form a thermoset polymer.