What is the effect of coating on UV printer printing? It can enhance the adhesion of the material during printing, make the UV ink more permeable, the printed pattern is scratch-resistant, waterproof, and the color is brighter and longer. So what are the requirements for the coating when the UV printer prints?
1. Adhesion: There are many methods for testing adhesion, such as the 100-grid method.
2. Leveling: Leveling is a common performance index in coatings. It refers to the automatic flow of brush marks and spraying mist particles on the coating film to become flat after the coating is brushed or sprayed on the surface of the object. Ability to smooth surfaces. UV printer coatings with poor leveling properties will affect the decorative effect of printed matter.
What’s more, if the brush marks on the coating surface will not disappear automatically, the uneven coating surface may rub against the nozzle of the UV inkjet printer, causing major losses. A good quality multifunctional uv printer coating should level off quickly after brushing or spraying.
3. Film-forming transparency: As a high-value-added decorative product, UV printed matter generally has high requirements for appearance. This requires the UV printer coating to be colorless and transparent. Now there are some two-component coatings based on epoxy resin on the market, which turn yellow in film formation, which affects the decorative effect, so pay attention to identifying and purchasing high-quality UV coatings.
4. Weather resistance: For UV printing products, especially signs and billboards used outdoors, the printed matter is required to be as bright as new for a long time without fading. Now some UV inkjet printer coatings will turn yellow under long-term light conditions, which is not very suitable for outdoor use. Even for UV printing products that are only used indoors, it is generally necessary to consider the use of weather-resistant UV printer coatings to ensure product quality.
5. Product safety: Product safety is also an issue that must be considered when choosing a UV printer coating. Solvent-based UV printer coatings not only smell bad, but also cause safety hazards when stored improperly, and transportation is inconvenient.
UV printers have certain requirements for coatings. The so-called coating-free is not absolute and needs to be treated differently according to the specific conditions of the product materials.
Post time: Feb-01-2023