Offset vs flexo printing for packaging: what's the difference?
Strip away the jargon and this is a choice between two routes to the same destination: ink on a corrugated box. Flexo prints the board directly. Offset prints a paper sheet first, then laminates it on. Neither process is "better" — but for any given carton, one of them is clearly right.
How does flexo printing work?
Flexography is relief printing at industrial speed. A flexible photopolymer plate carries the image as a raised surface, picks up fast-drying water-based ink from an anilox roller and presses it straight onto the corrugated blank — usually in the same machine pass that slots and creases the box. This direct route is called post-print. Flexo thrives on line work: logos, type, solid colour panels, handling symbols and barcodes, typically in one to four spot colours. It is the process behind nearly every brown shipping carton you have ever opened.
How does offset (litho) printing work?
Offset lithography takes the scenic route. The image transfers from a flat plate to a rubber blanket and onto a smooth coated paper sheet, using fine halftone screens that reproduce photographs, gradients and small text with magazine-level fidelity. That printed sheet is then glued to corrugated board in a process called litho-lamination, and the laminated board is die-cut into the finished box. More steps, more cost — and an appearance no direct print on kraft can match.
How do the two compare on print quality?
Offset wins the beauty contest. Skin tones, product photography, metallic and gloss or matt coatings all sit comfortably within its range. Flexo plays a different game: bold, durable graphics that survive forklifts, humidity and a month at sea without scuffing. Modern HD flexo plates have narrowed the gap considerably on mid-range work, but if a shopper will judge the box at arm's length on a shelf, offset litho-lamination remains the standard. A smooth fine flute under either process sharpens results — see our flute types guide for why E flute is the printer's favourite.
Which process is more economical?
For long runs of simple graphics, flexo is unbeatable: the board is printed in one pass, plates last for repeat orders, and there is no paper, no lamination and no second machine. Offset carries the cost of the printed sheet, the lamination pass and tighter handling — so its unit cost is always higher. The crossover logic is simple. Spending on offset makes sense when the box itself sells the product; everywhere else, that money is better spent on board grade. Run length matters too: offset plates are cheap and quick to make, which can favour litho-lam on short, complex, multi-colour jobs where flexo plate costs would dominate.
So which should you choose for your packaging?
Ask where the box will be seen. Transit packaging that only warehouse staff handle — the classic RSC master carton — wants flexo: shipping marks, carton numbers, buyer logos and barcodes, printed economically and built to survive the journey. Retail, shelf-ready and gift packaging — usually die-cut boxes in fine flute — earns offset litho-lamination, because presentation is the point. Many export programmes sensibly use both: an offset-printed retail box travelling inside a flexo-printed master. We run both processes in-house alongside corrugation, die-cutting and finishing — the full line-up is on our machinery and capacity page — so the artwork decides the process, not the other way round. Send your artwork and quantities through the request-for-quotation form and we will price both routes side by side.
Flexo, offset — or both in one programme?
Send the artwork and run quantity. We print both ways in-house and will quote the route that fits the job within 24 hours.