If the reflector is not installed, about 80% of the UV light cannot reach the surface of the printed matter due to diffusion. Therefore, the UV lamp must be installed with a lamp cover to make the UV light reflect and concentrate on the surface of the printed matter. At the same time, it is also necessary to clean and maintain the reflector at any time. If the paper powder or spray powder is attached to the reflector, it will affect the reflection efficiency of the UV lamp. If the UV lamp is not used for a long time, the UV lamp cover should also be closed to prevent dust from entering.

Offset printing machine is a kind of lithographic printing machine. When printing, the printed pictures and texts are printed from the printing plate to the rubber cylinder, and then transferred to the paper by the rubber cylinder.