In the past, UV light source were widely in the printing industry, such as high pressure mercury lamps and metal halide lamps. Due to the large size lighting and power equipment, users are concerned about high power consumption and heat resulting in damage to the printing press and substrate and ozone and other problems during use. With the emergence of UV curing technology, UV LED has received more and more attention due to its environmental characteristics, less environmental pollution than solvent type, low operating cost and solvent type. According to the survey results, UV LED flat printer market share reached 11.7%, while the market share of solvent based wide inkjet printers has dropped to 33.6%. UV curing technology is a green industry, a new technology, has become the “5E” feature of the north American radiation therapy committee’s industrial technology, which fully demonstrate the characteristics of the technology, namely high efficiency, energy saving, environmental protection and extensive adaptability. At present, the commonly used UV curing lamp in the market is generally mercury arc lamp, called mercury lamp. Ultraviolet mercury lamp life is limited, and energy consumption is very large, the effective use of energy is not high. In addition, although ultraviolet mercury lamp is relative to solvent ink, because there is no UV LED emissions and environmental, environmental characteristics, ultraviolet mercury lamp has some hidden pollution, such as easy to produce ozone, the health impact is greater.

UV LED curing technology made its debut, drawing wide attention from the industry, and many publishers and ink manufacturers have demonstrated their own technology. UV LED curing is the most attractive technology in the field of energy curing. The technology is widely used in energy saving, high efficiency, economy, environmental protection, wide adaptability of ultraviolet and non-infrared radiation sources. Nowadays, the market demand for UV LED technology is very strong, and digital printing has become the largest market for this technology, including the innovative fields of inkjet technology, while the advantages of ultraviolet LED are only to meet the needs of this field.