Spot UV coating refers to the application of UV varnish over a specific pattern on an existing black print. After the UV varnish is applied, the coated area appears more vibrant, glossy, and three-dimensional compared to the surrounding printed effects. The thickness of the screen printing ink creates a raised effect after curing, resembling embossing. Screen-printed UV coating is superior to offset printing in terms of height, leveling, and thickness, making it highly favored by international clients.
Screen-printed spot UV coating has resolved the adhesion issues encountered when laminating BOPP or PETPPOPP after black printing, and it can also produce a raised effect. Furthermore, it is scratch-resistant, fold-resistant, and low-odor, creating significant market potential. This technique can be applied in packaging, labels, books, and promotional materials, providing a striking finishing touch.
The equipment needed for screen-printed spot UV coating is relatively low-cost, and small-scale production does not lead to waste (the cost of making each plate ranges from 50 to 150 yuan and can be reused multiple times). The necessary equipment includes plate exposure, printing, and UV curing. The entire investment for this setup can be completed with just a few tens of thousands of yuan. If outsourcing plate-making is utilized, it can further reduce the investment in plate-making equipment. The electricity consumption is approximately 9 kW, requiring only a few operators, and the process is straightforward. With just a bit of guidance, it can be easily understood, occupying around thirty square meters of space.
With the necessary hardware, achieving spot UV coating is simple, with a coating area reaching up to 60 cm x 90 cm on paper, and a thickness of up to 5 cm. If you already possess the hardware, development becomes even easier. Just pay attention to selecting the appropriate UV varnish based on the substrate, the viscosity of the varnish, and the ink return during printing. Choose the mesh parameters based on customer requirements for thickness and the emulsion thickness during plate-making, generally between 350 and 420 mesh. Aohea has also adopted this technology to enhance the overall performance of its products.
