Solutions to the 9 major problems of flexo UV glazing (1)


UV glazing plays an important role in flexo printing and is generally used online. The UV curing unit consists of two UV tubes and a reflecting device. Water-based inks can be printed with UV varnish after printing, which can protect water-based inks. Some faults often occur during UV glazing.
Yellow coating
The main reason for the yellowing of UV varnish after curing is twofold: UV varnish is left for too long, especially the yellowing of inferior varnish is more serious; UV irradiation is excessive, and UV varnish is excessively cured. Solution: If it is the quality problem of UV varnish itself, you must replace the UV varnish; if it is caused by overexposure, reduce the power of the UV source or increase the glazing speed.