UV printing technology because of its diversity is to advertising printing material, coating, and other industries to bring a revolution quietly. On a lot of transparent material, such as glass and acrylic board, a common printing technology is after UV color printing, add a layer of white coating on, bright-colored to line out of the picture. Usually, the white back is painted by a special nozzle spray white UV ink on the printer. In the process of contact with the customer, we found that the print after a period of time, this layer of white ink appear to crack, the pattern of damage, the following figure.
The reason:
White ink cracking factors is mainly caused by the UV intensity is not high, white ink is more brittle, at the same time, because the ink layer and substrate thermal expansion coefficient is different, in the process of material heatsink layer by stretching. The UV curing technology is developed in recent 20 years, its main advantage is fast curing and environmental protection. Its shortcomings are obvious, because of the fast curing, internal stress is larger, the intensity is not high. The problem was more significant in white ink, usually white ink cover rate, in order to achieve certain usually contain a lot of titanium white kind of whitening packing, the existence of packing, will further reduce the toughness of the ink. Therefore, to avoid the crack caused by the white ink, should choose high toughness of the material.
The solution:
In order to solve the problem of cracking UV plate printing design, we recommend flat-panel printers white coating. The UV flat-panel printer is white coating using the advanced material technology of environmentally friendly coatings. It is through the nozzle spray, does not plug nozzle, can safely and effectively replace the UV white UV ink in the printer. And, more importantly, UV flat-panel printers white coating has excellent flexibility, not happen the problem of a craze in the long-term use, can successfully improve the durability of the product. Above is one of the customers in the use of our UV flat-panel printers white coating after successfully solved the problem of the craze. Has reached the requirement of customers.