How to choose UV ink
Release time:2021-11-12
The curing performance of ink is a key factor in determining the quality of UV printing products. Therefore, when choosing UV ink, the main consideration is whether the emission wavelength of the UV lamp used in our printing equipment matches the triggering wavelength of the photoinitiator in the ink. In addition, the key properties such as curing speed and adhesion of different types of UV ink provided by different manufacturers are also not the same. Generally speaking, as long as white ink and black ink can meet the requirements, other color schemes of ink will not have too many problems. Therefore, black ink and white ink should be carefully examined.
Performance characteristics of UV light source
The wavelength range of UV light is 200-600nm, but ozone is generated at a wavelength of 254nm, while heat is generated above a wavelength of 400nm. Ozone pollution pollutes the environment and damages the health of workers; Heat not only causes dimensional instability and even severe deformation of printed materials, but also leads to energy waste, both of which we do not want to occur in UV printing. At present, low-energy UV (HUV/LEC) lamps sold in the market emit wavelengths between 280-600nm. Although they avoid the ozone band, they still contain a significant amount of heat generation. Therefore, LED lamps have become a new development direction for UV light sources in recent years. The available wavelengths for single wavelength LED lights are 365nm, 385nm, and 395nm, avoiding the ozone and heat generation bands. Moreover, the light energy of single wavelength light sources is highly concentrated, resulting in high ink curing efficiency and safer use.
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