Problems with UV Flexo Printing Technology

First, UV light source UV flexo printing Every color group needs to be equipped with a UV light source. Different colors of UV flexo inks have different ability to absorb purple lines, for example, yellow and magenta have low absorptivity, are easy to cure and dry, and blue and black have strong ability to absorb ultraviolet rays and are less likely to dry. The power of the UV lamp can be assigned according to different colors to ensure proper drying of various colors of UV ink, and it can also save energy. Pay attention to the aging of the UV light source and replace the UV lamp in time to prevent incomplete curing and adhesion.
Second, anilox roller. When UV flexo inks are used, the anilox roller preferably has a mesh angle of 30° or 60°.
Third, rubber roller. The rubber roller must be resistant to UV ink. The rubber roller usually used is usually made of EPDM rubber (EPDM rubber) or silicone rubber.
Fourth, the plate. Although flexographic printing plates currently used can basically be used for UV flexo printing inks, it is better to use plates with better UV ink resistance, such as DuPont's UVP-67 opening plate.
Fifth, the ink viscosity. UV flexo inks have a slightly higher viscosity than water-based inks or solvent-based flexo inks, and they have a wide range and can range from 200 to 500 cps.
Six, storage. UV flexo inks should be strictly protected from light and heat. Storage temperature should be controlled at 5 °C ~ 30 °C, storage shelf life is generally six months.
Seven, additives. There are three main types of auxiliaries commonly used in UV flexo inks:
1. UV reactive diluent;
2. UV curing accelerator;
3. UV ink cleaner.
Eighth, security protection: At present, there are two main precautions, one is the harm of UV radiation to the human body, and the other is the harm of UV ink to the human body.
UV flexo printing ink and its process technology are still continuously improving, new varieties and new equipment are emerging. All of these will promote more perfect UV flexo technology.