Intensity is the overall power of the lamp. Also known as power density, it is most often designated in watts and refers to total lamp output across the entire electromagnetic spectrum. The cure time of the chosen adhesive depends on the intensity and the wavelength of the UV light. Such a system can only be used with adhesive formulations in which a secondary cure mechanism has been incorporated. Secondary mechanisms include heat, moisture and activators.
Surface curing is especially important when using UV light.
If inadequate lamps are used, a tacky surface may remain after cure. To prevent this, the lamp should produce a high-intensity light in a wavelength below 300 nanometers. Adhesives cured by UV light tend to have high strength, a high gap-filling capacity, short curing times to handling strength and good environmental resistance. This simplifies material storage, handling and packaging. First, determine the photo-initiator system in the adhesive.