UV flatbed printers can’t press the varnish out, but foaming can solve the problem!

Varnish has become increasingly popular in recent years, as patterns are printed using UV flatbed printers. It has qualities such as weather resistance and wear resistance , making it shiny. However, many people have issues with the varnish not being removed when using the equipment, which affects both output and regular equipment usage. What prevents the varnish from pressing out and bubbling? Let’s take a look together.

The following are the causes of the varnish in UV flatbed machines not pressing out and bubbling:

1. The coating is too thin and the UV varnish’s viscosity is too low.
2. When the paint and varnish diluents are mixed, water is added.
3. When diluting the varnish, too much diluent is used.
4. The printed product has a rough surface and an excessive amount of varnish absorption, leaving a thin layer.
5. The printed object’s dirty, wet surface is covered with materials such as water, acid, salt, and alkali.
6. The humidity level at the location is over 90%, making it easy for the coating to become dull and white.
7. There is a lack of temperature on the job site, delayed drying, and water buildup on the surface that results in gloss loss.

The following are remedies for UV flatbed machine varnish bubbling caused by the aforementioned causes :

1. Keep the coating properly stored to prevent water from soaking in.
2. Be mindful of adjusting the ratio of mixing. Each type of varnish has a distinct mixing ratio, so it’s important to carefully follow the instructions and ratios provided by the manufacturer of the UV printer while mixing.
3. Use more varnish on products that are roughly printed.
4. To prevent contamination, thoroughly clean the printed item’s surface before applying the varnish.
5. Modify and regulate the ambient humidity to a range of 25% to 80%.
6. Modify and regulate the inside temperature to a range of 20° to 40°.
7. Depending on various material conditions, adjust the varnish’s coating amount and viscosity appropriately.

This is an introduction to the topic of varnish bubbling and not pressing out on UV flatbed machines. If you need further information, don’t hesitate to call and seek advice. Songpul is here to help you out!