Theoretically, high-gloss curtain coating machines can use water-based paints, but certain conditions and equipment adjustments must be met. The key lies in the ability to consistently control the paint's flowability, drying speed, and gloss recovery.

Whether a curtain coating machine needs a UV curing machine depends on the coating system used. If the curtain coating machine uses UV-curable coatings, then a UV curing machine is necessary; if it uses thermosetting or air-drying coatings, a drying oven or natural drying line can be used.

A curtain coating machine is a device that applies coatings by utilizing the principle of a free-falling liquid stream. A roller coating machine, conversely, is a coating device that transfers paint onto a workpiece surface through mechanical contact.

UV paint differs from traditional solvent-based or water-based paints; its viscosity characteristics, reactivity, and curing mechanism are more complex. Therefore, it must be used with a specially designed UV curtain coating machine.

The coating speed of a UV roller coating machine can be controlled by an automatic system, but manual calibration is still required. Automatic control ensures stability, while manual intervention is used for initial settings and error correction.

The UV roller coating machine is best suited for coating medium-sized furniture and decorative boards with a width of 800mm-1300mm and a thickness of 6mm-25mm. Within this range, the highest production stability and best coating quality can be achieved.

The overall lifespan of a UV coating dryer machine is generally 8–12 years. Of course, this figure will vary depending on usage conditions and maintenance. In other words, the lifespan of a UV coating dryer machine is not fixed but "manageable."

Primers have excellent impermeability and sealing properties, preventing air and moisture intrusion and helping to extend the coating's lifespan. Therefore, from a coating system perspective, "primer is a necessary preparatory step in the UV roller coating machine process," especially when pursuing a high-quality surface finish.

Under normal operating conditions, the lifespan of a UV lamp in a UV coating dryer machine is generally 800 to 1500 hours. Although LED UV lamps theoretically have a longer lifespan, most UV coating dryers still primarily use mercury lamps and metal halide lamps due to their traditional structure.

If UV paint is not finely filtered (generally using a 200-400 mesh filter) during production and transfer, it can easily trap tiny impurities, cured particles, or polymer clumps. These particles are carried into the coating during roller application, forming surface particles.