Most UV curable contains two wavelengths that work at the same time (if you include IR,3). Short wavelengths work on the surface, long wavelengths work in ink or coatings. The theorem is that short wavelengths are absorbed on the surface and cannot reach deep results. Shortage of short wave exposure can lead to sticky surface.Long wave energy deficiency can lead to adhesion. Each recipe and thickness of film will benefit from an appropriate short wavelength energy rate. The most basic mercury lamp emits energy within these two ranges, but it is particularly suitable for coatings and thin ink layers when it is strongly launched in short wavelengths. Highly absorbent materials, such as adhesives and screen inks, are more suitable for long wave curing using long wave light triggers. The tubes used to solidify these materials contain additives and mercury, which emit more UV rays in long wave UV.These long wave tubes also radiate some short wave energy, which is sufficient to cope with the surface solidification.

Many special applications, such as a large amount of additives containing titanium oxide this type of material for curing, curing or need through the plastic or glass, must be long curing, because the material is almost completely prevented the shortwave.