If you’re printing on transfer metallized cardboard, you’ve probably asked yourself: Should I use offset, gravure, or flexo?
There’s no single right answer. Each process has its own strengths and quirks when it comes to that ultra-smooth, mirror-like surface. And if you pick the wrong one, you might end up with ink that won’t stick, colors that look dull, or cracking along the folds.
Offset lithography is the most common commercial printing process. It works well on transfer metallized cardboard, but you need to be careful.
How it behaves on metallized board:
Ink adhesion can be tricky because the metallic surface is non-absorbent. You’ll almost certainly need oxidative or UV inks designed for low-surface-energy substrates.
The printed result is sharp, with good detail and color consistency.
Biggest risk: ink scuffing or incomplete drying. The metal layer doesn’t “breathe” like uncoated paper, so drying time can be longer.
When to choose offset:
Small to medium runs, frequent design changes, or when you need high-quality graphics without investing in expensive cylinders. Many cosmetic and pharma cartons are still printed offset with proper surface treatment or primer.
Verdict: Works well, but requires metallic-specific inks and sometimes a primer coat.
Rotogravure is the traditional choice for long runs of metallized paper , think cigarette packs, food wrappers, and high-volume luxury boxes.
Why gravure loves metallized board:
The engraved cylinder lays down a heavy, consistent ink film, which covers the metallic surface beautifully. You get deep, saturated colors and no mottling.
It handles fine screens and gradients better than flexo.
Gravure inks are typically solvent-based and evaporate quickly, so drying is less of an issue.
The catch:
Cylinder engraving is expensive and time-consuming. Gravure only makes economic sense for very long runs (often over 200,000–300,000 impressions). And if you need to change a design, it’s not cheap.
When to choose gravure:
High-volume production (tobacco, mass-market cosmetics, food packaging) where the same design repeats over millions of units.
Verdict: Best quality and consistency for long runs, but high upfront cost.
Flexography has come a long way. Modern flexo presses, with high-definition plates and improved inks, are now a solid option for metallized paperboard.
What flexo does well:
It prints on nearly any substrate, including metallized board, with good ink adhesion – especially using UV flexo or water-based inks with the right surface tension.
Lower plate cost compared to gravure. Quick changeovers.
Can print in-line with coating, die-cutting, and even cold foil.
Limitations:
Ink laydown is thinner than gravure, so solid areas can look slightly less dense.
Fine highlights and very small reverse text require high-quality plates and press setup.
When to choose flexo:
Medium to long runs, especially when you need fast turnaround or the ability to print variable data (e.g., lot codes, barcodes). Also great for flexible packaging and labels, but for metallized cartons, it’s increasingly common.
Verdict: Good balance of cost, speed, and quality for most commercial work.
No matter which process you choose, keep these basics in mind:
Surface tension should be at least 38 dyn/cm. Less than that, and ink will bead up like water on a waxed car. Most quality metallized boards are already treated, but always check.
Avoid excessive pressure – metallized layers are thin. Too much blanket or cylinder pressure can crush the coating and create white spots.
Test crease & fold before full production. Some inks crack along the fold line, especially on offset. A good pre-crease or scoring solves it.
Drying/curing – UV systems are your friend. They lock the ink instantly without soaking into the non-absorbent surface.
