From labels to cartons: Why converters are rethinking single-pass flexo

For converters with an established flexo capability, carton production can provide an opportunity to improve margins without requiring a shift to an entirely different operating model.

From Edale’s perspective, the real question is not whether label converters can produce cartons, but why more of them have not already challenged the old assumptions around how carton work should be produced.

The move is often made to look more difficult than it needs to be. Too much of the market still treats folding cartons as if they automatically belong in a traditional sheetfed environment. That view is increasingly outdated. Sheetfed will remain the right route for some work, but for shorter-run, higher-value cartons, single-pass flexo can offer a more commercially relevant way in.

Many label converters already have the production habits the carton market now values. They understand flexo, brand consistency and fast-turnaround work where every changeover carries commercial weight.

The main adjustment is around the physical demands of the pack itself. Carton work brings board behaviour, creasing, cutting and finishing into the process, and asks converters to think beyond print to how the finished pack performs once it leaves the factory. That creates a learning curve, but it is not a reason to stand still. Converters that already understand agile, brand-critical flexo production are often better prepared for this shift than the industry gives them credit for.

Carton work no longer only belongs at very high volume. Brands increasingly want shorter runs, SKU variation, versioning and faster turnaround. Label converters have been handling those pressures for years.

A high-end whisky carton is a useful example. A converter may already produce the label, while the carton is lower volume but higher value. The conventional assumption is that this work should move into a large sheetfed workflow. That thinking deserves to be challenged. In the right application, single-pass flexo gives the converter a practical option, bringing print and finishing into one controlled process and turning complexity into a margin opportunity.

There is no fixed sweet spot where in-line flexo becomes the right answer. Run length matters, but it should not be the only lens. Repeat size, material, design and complexity all affect the calculation, and converters need to question whether inherited production habits are still serving their customers or their margins.

The point is not that flexo replaces sheetfed across the board. It is that converters need a more serious conversation about where each route creates value. In many cases, the habit of accepting shorter or more variable jobs as loss leaders to secure larger-volume work no longer reflects the economics of the market.

Smaller runs do not always have to be treated as the cost of winning bigger jobs. With the right route, they can become worthwhile in their own right.

Press capability matters, but workflow often decides whether the move into cartons works commercially. Bringing print and finishing into one controlled process can reduce labour, energy, floor space, work in progress and handling. That is where the commercial argument becomes strongest: the opportunity is not simply to print cartons differently, but to remove unnecessary stages from the way cartons are produced.

Every extra touchpoint adds cost and can introduce waste. For label converters that are used to faster production, that workflow difference is important.

Demand for platforms that can support both labels and cartons reflects a wider industry shift. Converters are looking for flexibility, but flexibility on its own is not enough. The strongest businesses will be those that use capability strategically, choosing the production route that best protects margin, speed and customer value.

For a label converter, the logic is straightforward. Familiar flexo knowledge can become the foundation for a broader packaging offer, while carton work can create a stronger margin opportunity where the application, run length and workflow are right.

For converters willing to challenge the default assumptions around carton production, the opportunity is clear: use existing flexo expertise to build a more agile, efficient and commercially valuable route into folding cartons.