UV varnish is a solvent-free, fast-curing and eco-friendly photocurable coating. It is widely applied in printing, packaging, color boxes, labels, film printing, paper crafts and other fields. Its main functions are to enhance surface gloss, protect ink layers, improve rub and scratch resistance, and upgrade product grade and compliance.

Many printing plants encounter common problems such as unsatisfactory gloss, poor hand feel, failed hot stamping, weak adhesion, film cracking after folding and excessive odor during production. In most cases, these issues are caused by improper selection of UV varnish. This article systematically introduces mainstream UV varnishes by common classification standards, including their features and applicable scenarios, to help you make accurate selection.
UV varnishes

1. Classification by Gloss Effect (Most Common)

1.1 High-gloss UV Varnish (Mirror Varnish)

Features: High light transmittance and excellent mirror effect after curing. It presents full and bright appearance with superior flatness and wear resistance. It greatly improves color saturation and makes patterns more vivid and three-dimensional. With good leveling property and uniform film formation, it is the most versatile UV varnish.

Applications: Various color boxes, gift boxes, food packaging, cosmetic boxes, book covers, general paper products and regular labels. Ideal for packages requiring bright surface and premium transparent texture.

Advantages: Cost-effective, stable for mass production, good scratch resistance and remarkable brightening effect.

1.2 Matte UV Varnish (Delustering Varnish)

Features: Formulated with advanced delustering system, it forms frosted matte surface after curing with soft and premium touch. No strong reflection or glare. Matte degree can be customized from 5° to 30°, delivering elegant and steady color performance.

Applications: High-end gift boxes, luxury packaging, cigarette packs, wine boxes, premium albums, art books and light luxury daily chemical packages. It has become a mainstream choice for high-end packaging.

Note: Matte varnish is slightly less wear-resistant than high-gloss type. The formula needs to balance matte effect and rub resistance.

1.3 Semi-matte UV Varnish (Medium Gloss)

Features: Its gloss level is between high-gloss and full matte. It provides soft luster without glare, retains color hierarchy, and balances texture and clarity.

Applications: General supermarket packaging, daily commodity color boxes, manuals, posters and mid-range paper crafts.

2. Classification by Special Functions & Hand Feel (For High-end Packaging)

2.1 Soft-touch UV Varnish

Features: The cured surface delivers velvety and silky hand feel. It is skin-friendly, fingerprint-proof and rub-resistant. With elegant matte look and durable performance, it is a classic process for high-end packaging.

Applications: Premium cosmetic boxes, skincare gift boxes, mobile phone boxes, fine art crafts and luxury outer packages.

2.2 Textured UV Varnish

Features: Creates three-dimensional embossed textures such as leather grain, fabric grain, frosted grain, litchi grain and grit grain. It features distinct visual recognition and replaces traditional lamination process.

Applications: Art gift boxes, special packaging, premium book covers and personalized craft products.

2.3 Scratch & Abrasion Resistant UV Varnish

Features: Forms high-hardness film with outstanding resistance to steel wool rubbing, scratching, folding and alcohol wiping. Its anti-wear performance is far better than ordinary varnish.

Applications: Supermarket circulating packages, courier boxes, frequently rubbed outer packages and goods requiring repeated handling.

2.4 Low-odor & Low-migration Food-grade UV Varnish

Features: Free of benzene and ketone compounds, low VOC and no residual odor. It meets food contact safety standards with complete curing and zero migration risk.

Applications: Food paper bags, snack packaging, paper cups, candy boxes, infant paper products and export food-grade packages. It is a necessary material for export orders.

2.5 Hot-stampable & Printable UV Varnish

Features: Moderate surface tension ensures good adhesion of hot stamping foil. It can withstand high temperature without foil peeling or flying. It also supports post-printing coding and laser marking.

Applications: Cigarette packs, wine boxes, high-end hot stamping gift boxes and packages requiring traceability coding.

2.6 Anti-blocking UV Varnish

Features: Dense film and smooth surface prevent adhesion during rolling and stacking. It effectively solves sticking problems under high temperature and high humidity conditions.

Applications: High-speed mass printing, production in hot summer, printing factories in humid southern areas and large-volume rolled packages.

3. Classification by Construction Process (For Different Printing Machines)

3.1 Roller Coating UV Varnish (In-line Varnish)

Designed for in-line roller coating on printing presses. It has excellent leveling property and uniform film thickness, ideal for high-speed mass production. It is the most commonly used general-purpose varnish for printing plants.

3.2 Screen Printing UV Varnish (Thick Layer Varnish)

Supports thick coating to create strong three-dimensional effect. Suitable for partial UV coating, raised logo and embossed decoration.

3.3 Curtain Coating UV Varnish (Full Mirror Gloss)

Features large coating thickness, top-level transparency and flatness. Perfect for full-area high-gloss high-end products.

3.4 Spray Coating UV Varnish

Uniform atomization and ultra-thin coating layer. Applicable for irregular products, curved surface packaging and 3C product shells.

4. Classification by Environmental Standard (Industry Development Trend)

4.1 100% Solvent-free UV Varnish

Zero solvent, zero volatile content and no odor. It reaches the highest environmental protection level and complies with global export standards, becoming a mainstream upgrading direction.

4.2 Water-based UV Varnish

Uses water as diluent with low irritation and low VOC. The film is delicate, suitable for wooden materials, flexible films and high-end products with strict odor requirements.

5. Classification by Applicable Substrate (Solving Adhesion Problems)

5.1 Paper-specific UV Varnish

Mild penetration and strong adhesion, no brittle edge and good folding resistance. Compatible with white cardboard, coated paper, kraft paper and matte art paper.

5.2 Film-specific UV Varnish (PE / PET / BOPP)

Specially formulated for low surface energy films to solve common problems such as poor adhesion, coating peeling and cratering. It delivers stable adhesion and excellent rub resistance.

5.3 Laminated Film Specific UV Varnish

Developed for PP laminated film, matte film and glossy film. It effectively solves typical defects including poor wetting, cratering, pinholes and weak adhesion on laminated surfaces.

6. Summary: Quick Selection Guide

  • General packaging & color enhancement → High-gloss UV Varnish
  • High-end light luxury style & subtle texture → Matte / Semi-matte UV Varnish
  • Luxury gifts & premium hand feel → Soft-touch UV Varnish
  • Food, infant products & export orders → Low-odor Food-grade UV Varnish
  • Post hot stamping & coding process → Hot-stampable UV Varnish
  • Film and laminated surface printing → Film-specific UV Varnish
  • High-speed production & anti-blocking demand → Anti-blocking & Abrasion Resistant UV Varnish

Conclusion

UV varnish is not a universal product. Varnish systems vary greatly according to gloss, function, construction process and substrates. Proper selection helps upgrade product grade, reduce defective rate and pass environmental and quality inspection smoothly. Improper selection will lead to coating peeling, film cracking, poor wear resistance, excessive odor and failure of post-processing.

StarColor provides a full range of UV varnishes including high-gloss, matte, soft-touch, abrasion resistant, low-migration food-grade, hot-stampable and film-specific types. Our products are compatible with paper, laminated film, PE and PET substrates, featuring stable performance, low odor and strong adhesion. We help printing factories solve all kinds of surface coating challenges efficiently.