What is UV Coating in Packaging? A Guide to All Queries

UV coating is a liquid-based finish applied to printed boxes. Once spread evenly on the surface, it’s cured instantly under ultraviolet (UV) light. As a result a glossy or matte layer is formed that makes the print look sharp and vibrant. Many boxes in packaging come with UV coating. Plus the coating protects the printed designs from moisture, dust, and scratches. In this blog, we’ll learn a little more about the UV coating and how it is helpful in packaging.

UV Coating Dates Back to History

UV coating is not a new type of coating in the packaging industry. The use of UV coating started gaining popularity in the 1970s when printing technology began to shift toward faster speeds. But over the decades, UV coating evolved from being a luxury finish to a mainstream option. Today it’s widely used in industries like cosmetics, food, electronics, and luxury packaging.

It’s commonly used on products such as:

Product boxes
Brochures
Business cards

Duplo’s DuSense DDC-8000 for Precision in Spot UV Printing

One of the most innovative machines in UV coating technology is the Duplo DuSense DDC-8000 which has set new standards for precision and efficiency in spot UV printing. The process begins with a clear mask file where black-and-white elements define the exact areas that will receive the UV coating. Once the printed sheets are loaded, the machine uses registration marks to align the UV layer perfectly on the design.

The DDC-8000 can apply coatings ranging from 10 to 80 microns thick. This adds depth and visual appeal, transforming ordinary packaging into something eye-catching and memorable.

Moreover, this machine has the ability with 600 dpi inkjet heads and a fully automated setup. For print service providers that means faster turnaround times with reduced waste and higher profit margins.

How is UV Coating Done By Following Some Steps?

The UV coating process is nowadays widely used in packaging. Almost everyone knows its name in the packaging industry. It all begins with a series of steps, such as:

Step 1 Printing for Better Results:

The packaging or printed sheet is first printed using offset or digital printing.

Step 2 Coating Application with Rollers:

A UV coating liquid is applied using a roller, screen, or inkjet system to specific or full areas.

Step 3 Curing Under UV Light:

The coated sheet passes under ultraviolet lamps that instantly harden and dry the coating.

Step 4 Finishing of Design:

The cured sheets are cooled, trimmed or folded depending on the product design.

Step 5 Quality Checks on Top:

Each piece is inspected for shine, alignment, and texture to ensure consistent results.

This quick and efficient process gives the people handling the printers the power to add premium effects without long drying times or messy setups.

Types of UV Coating That are Utilized in the Market

There are several types of UV coatings, each offering a unique look and feel depending on the application:

Gloss UV Coating
Matte UV Coating
Satin UV Coating
Spot UV Coating
Raised UV Coating

Variety of Liquids Used in UV Coating Process

The main ingredient in UV coating is a liquid polymer that contains photo-initiators. These simply react when exposed to UV light. When the coated surface passes under a UV lamp, these initiators trigger a chemical reaction. So that ultimately solidifies the liquid instantly, forming a tough and protective layer.

But because of increasing awareness the modern UV coating liquids are made with fewer volatile organic compounds (VOCs) for better recyclability. For packaging, the coating not only enhances visual appeal but also prevents smudging. That is necessary in the case of custom rigid boxes. Moreover, the moisture damage is especially important for food and cosmetic boxes that require long shelf lives and a fresh appearance.

Benefits of UV Coating in Packaging Boxes

UV coating offers a long list of advantages that make it a top choice in both printing and packaging industries:

The curing process is almost immediate. This ultimately saves time and increases production speed.
You can have the protection against scuffs, scratches and fingerprints.
And the colors appear brighter and more vibrant.
You can also have the premium glossy or matte finish.
The fear of excessive emissions is also eradicated. Because there are minimal emissions and they produce less waste.

Examples of UV Coating Done on the Custom Boxes

UV coating can be done on the following custom packaging boxes such as:

Final Thoughts

UV coatings are one of the most widely used coatings in the packaging industry. Almost every box can be easily coated with UV coating. If you are considering investing in UV coating, then it can be a lucrative decision for both branding and increasing sales.