There are many ways to measure adhesion, such as the hundred grid method. If the quality requirements of the printed product are high, you can also test whether the printed product is immersed in water or whether the painted surface of the printed product falls off. Adhesion is the key to measure the quality of UV flatbed printer coating. A good coating should pass the 100 grid test and will not fall off after being soaked or boiled.
Leveling is a common performance index in coatings, which refers to the ability of the coating to automatically flow into a flat and smooth surface after brushing or spraying on the surface of the object, the brush marks and spray fog particles appearing in the coating film. UV flatbed printer coatings with poor leveling will affect the decorative effect of printed products. More importantly, if the brush marks on the coating surface will not disappear automatically, the uneven coating surface may rub the nozzle of the UV flatbed printer and cause major losses. A good coating should be well formulated and level off quickly after brushing or spraying.
3, weather resistance
For UV flatbed printer printing products, especially signs, billboards, and printed materials used outdoors must be bright as new for a long time without fading. Specifically, this requires UV flatbed printer coatings to resist ultraviolet rays. Some coatings now turn yellow under long-term light conditions and are not suitable for outdoor use. Even UV printing products that are only used indoors, generally need to consider the use of weather-resistant UV flatbed printer coatings to ensure product quality.
4. Product safety
Product safety is also an issue to be considered when choosing the coating for UV flatbed printers. The solvent-based UV flatbed printer coating not only has a strong smell, but also causes safety hazards when improperly stored, and is inconvenient to transport.
5, film transparency
As a high value-added decorative product, UV flatbed printer prints generally have very high requirements for appearance. This requires UV flatbed printer coating to be colorless and transparent. At present, there are some two-component coatings based on epoxy resin on the market that form yellowish films, which affect the decorative effect.
6, the ease of use
The UV flatbed printers currently on the market have two-component or multi-component coatings, which need to be configured according to the ratio specified by the UV flatbed printer manufacturer before use, which is inconvenient. Compared with multi-component products, the single-component UV flatbed inkjet printer coating without configuration has a greater advantage in use.