Film Lamination vs Flute Lamination vs Litho Lamination: What’s the Difference?
Three processes, three different machines
Film lamination bonds a thin plastic film to a printed sheet. Flute lamination bonds a printed sheet to corrugated board. Litho lamination is the same bonding operation as flute lamination, described from the printing side rather than the machine side. The three get used interchangeably in enquiries every week, and film lamination vs flute lamination is the mix-up that costs the most, because each process needs a different machine that cannot do the other job.
The film lamination vs flute lamination question comes down to a single test: look at what is being added to the printed sheet. If it is plastic film, you need a film laminating machine. If it is board, you need a flute laminator. This guide sets out what each process does, what the machines look like on the floor, and how to tell which one your job mix actually needs.
Film lamination: plastic film onto a printed sheet
Film lamination applies a continuous plastic film to one or both sides of a printed sheet, using heat, pressure and either a water-based adhesive or a pre-coated adhesive layer on the film itself. The finished sheet goes on to be die cut, folded and glued as normal. The film is there for scuff resistance, moisture resistance and appearance, which is why it dominates cosmetics cartons, book covers and commercial print.
On the machine side, a film laminator is built around a web. Film unwinds from a reel, passes a coating and drying section on water-based machines, meets the printed sheet at a heated nip, and the laminated web is then separated back into sheets by a knife. Typical working widths run 1080 mm to 1300 mm to match B2 and B1 offset presses, film thickness runs 6 to 25 microns, and production speed reaches 80 m/min on calibrated stock.
Two points matter when comparing quotations. First, the separation knife is the part that changes with the film: a chain knife handles standard OPP and PET, while a hot knife is what you want for metalised PET, PVC and premium BOPP at high volume. Second, the accuracy figure a film laminator is judged on is overlap, the film margin around the sheet edge, and 2 mm is a normal specification. That number is not comparable to the accuracy figure quoted for a flute laminator, which is the point most cross-shopping buyers miss.
Tip. Before you compare any two quotations, answer one question: is the material being added a plastic film or a sheet of board? That single answer eliminates half the machines on your shortlist faster than any specification table, and it is the whole of the film lamination vs flute lamination distinction in practice.
Flute lamination: printed sheet onto corrugated board
Flute lamination bonds a printed top sheet onto a corrugated base sheet, using starch or PVA adhesive applied by a glue roller, with the two sheets brought together under a press section. The result is a printed corrugated blank that goes on to die cutting for shelf-ready packaging, retail displays and shipping cases that carry retail graphics.
The word flute refers to the wavy fluting inside corrugated board. That wavy layer is what makes the process difficult. The board is compressible, so press pressure has to be high enough to bond and low enough to avoid crushing the flutes, because crushed flutes cost you stacking strength in the finished case. The top sheet is usually 120 to 500 gsm, and the base is anything from E flute up to double wall BC.
A flute laminator therefore looks nothing like a film laminator. There is no reel, no drying tunnel and no knife. Instead there is a top sheet feeder, a bottom sheet feeder, a gluing unit, a registration section and a press section, plus a stacker. Because two separate sheets have to meet in the correct position, registration accuracy is the number that matters, and a modern automatic machine holds around 1 mm on corrugated. The whole layout is set out in our flute laminating machine guide, and the automation levels that separate a semi automatic from an automatic line are covered in the comparison of an automatic flute laminator against a semi automatic.
Litho lamination and cardboard lamination: where the line sits
Litho lamination is flute lamination named from the printing process. The top sheet is printed offset, which is where the litho in the name comes from, and it is then mounted on corrugated board. When a converter says litho laminated packaging and a machine supplier says flute lamination, they are describing the same operation from two ends of the same job.
Cardboard lamination is the term that causes the remaining confusion, because it describes the case where the base sheet is not corrugated. Here a printed sheet is bonded to a solid, dense board, typically 600 gsm and above, to make rigid boxes, book covers, game boards and puzzle blanks. YOUBOND draws the same boundary in its own comparison of flute and flat laminators, and the boundary is real: solid board does not compress the way fluting does, so the press section, the running speed and the feeder geometry are all specified differently.
In machine terms this gives you two families rather than one. A corrugated machine such as the SAGLIN DX-1450 is built around not crushing flutes. A cardboard machine such as the SAGLIN DX-1207 is built around holding a tighter register on a rigid substrate, and it holds around 0.5 mm rather than 1 mm for exactly that reason. Both sit in the same lamination machine range, and neither one is a film laminator.
Tip. If you are quoting litho laminated cases, confirm the flute crush allowance with your board supplier before the price goes out, not after. A press setting that bonds well but crushes 10 to 15 percent of the flute height will pass a visual check and still fail the customer’s compression test.
What film lamination is not
Film lamination in print finishing has nothing to do with the industrial laminating lines that share the word. This section exists because the term is used in three unrelated industries, and enquiries arrive at print finishing suppliers that were meant for someone else entirely.
- Panel lamination presses decorative foil or paper onto MDF, particleboard and plywood for furniture and interior fit out. The machines are board presses, not sheet-fed print finishing equipment.
- PVB and safety glass lamination bonds glass plies with a PVB interlayer in an autoclave, for automotive and architectural glazing. Nothing about it is shared with print.
- Flexible packaging lamination bonds two or more plastic webs, or a web and a foil, reel to reel, to build a barrier structure for pouches. It is reel to reel throughout, with no sheets involved at any point.
The print finishing process described in this article is sheet fed, it starts with a printed sheet, and it ends with a printed sheet. If your input is a board panel, a glass ply or a reel of film that never becomes a sheet, you are in a different industry with different suppliers, and a film lamination vs flute lamination comparison will not help you choose it. The general principle behind all of them is summarised well in the Wikipedia entry on lamination, but the machinery does not transfer between them.
Film lamination vs flute lamination vs litho lamination compared
The table below puts the three processes side by side on the points that actually change the machine you buy. Read the precision row carefully, because those three numbers measure three different things and cannot be ranked against each other.
| Film lamination | Flute lamination | Cardboard / litho on solid board | |
|---|---|---|---|
| Base material | Printed sheet, 100 to 500 gsm | Corrugated sheet, E flute to BC double wall | Solid board, roughly 600 gsm and above |
| Material added | Plastic film, 6 to 25 microns | Printed top sheet, 120 to 500 gsm | Printed top sheet, 120 to 500 gsm |
| Bonding agent | Water based adhesive, thermal film or pre-coated film | Starch or PVA applied by glue roller | Starch or PVA applied by glue roller |
| Machine feeds | One sheet stream plus one film reel | Two sheet streams | Two sheet streams |
| Speed is quoted in | Metres per minute, up to 80 | Sheets per hour | Sheets per hour |
| Precision figure | Film overlap, around 2 mm | Sheet registration, around 1 mm | Sheet registration, around 0.5 mm |
| Critical failure | Tunnelling, curl, poor film adhesion | Crushed flutes, warp, misregister | Warp, misregister, bubbling |
| Typical output | Cartons, covers, brochures | Shelf ready packaging, displays, retail cases | Rigid boxes, book covers, game boards |
| SAGLIN range | MTM-E and MTM-L series | DX corrugated models, DW-1650 for five ply | DX-1207 class cardboard models |
Tip. When you ask a supplier for an accuracy figure, state the substrate in the same sentence. Ask for overlap tolerance on film work and registration tolerance on board work. A 2 mm answer and a 1 mm answer look like a ranking and are not one, and this is the single most common error in a film lamination vs flute lamination comparison.
Which lamination process to choose
Work the decision in three questions, in this order, because each one removes a whole family of machines. Answered in sequence they settle film lamination vs flute lamination in the first step, then narrow the mounting machines in the second.
- Is the material added to the sheet plastic or paper? Plastic sends you to a film laminator. Paper or board sends you to a mounting machine.
- Is the base sheet corrugated? Corrugated sends you to a flute laminator, with press pressure control as the deciding feature. Solid board sends you to a cardboard model, with registration as the deciding feature.
- What format and volume? Match the working width to your press format first, then size the automation level to your monthly volume rather than to your peak week.
Three mismatches turn up often enough to be worth naming. The first is buying a film laminator expecting it to mount printed sheets on corrugated, which it physically cannot do, since it has one sheet feeder and a film reel. The second is running litho laminated work on a machine specified for solid board, which crushes fluting and shows up as failed compression tests weeks later. The third is choosing a working width that matches the current press rather than the press being installed next year, which is the most expensive of the three to unwind.
SAGLIN lamination machines: three lines, three jobs
SAGLIN builds all three machine families, which is why this article sets out film lamination vs flute lamination even handedly rather than arguing that one process suits everything. Prices are not published for any of the lines, because format, automation level and knife or press configuration change the figure substantially, and the cost drivers are broken down in our flute laminating machine price guide.
Film lamination. Nine models across two series, in 1080 mm and 1300 mm working widths, running water based, thermal and pre-coated films to 80 m/min. The MTM-E series covers growing converters with chain, disc and hot knife options. The MTM-L series handles thin films from 6 microns and sheets down to 350 by 350 mm, which matters for small cosmetics cartons. Both sit in the film laminating machine range.
Flute lamination. Six corrugated models including the DW-1650 for five ply work, built around press control that bonds without crushing fluting, holding registration around 1 mm.
Cardboard lamination. Four models for solid board, holding registration around 0.5 mm. A DX-1207 line commissioned for a packaging manufacturer in Russia is documented in our automatic cardboard laminator case study, including factory acceptance photographs.
Across all three lines the commercial terms are the same. Machines ship to more than 20 countries, warranty runs 12 months, and engineers are available for installation and operator training.
Frequently asked questions
What is the difference between film lamination and flute lamination?
Film lamination bonds a thin plastic film onto a printed sheet for protection and appearance. Flute lamination bonds a printed sheet onto corrugated board to make a printed corrugated blank. Film lamination uses a film reel and a separation knife, flute lamination uses two sheet feeders and a press section, and no machine does both.
Is litho lamination the same as flute lamination?
In practice yes. Litho lamination describes the same mounting operation from the printing side, meaning an offset printed top sheet mounted on corrugated board. Flute lamination describes it from the machine side. A machine supplier and a converter using the two terms are usually talking about one process.
What is cardboard lamination?
Cardboard lamination bonds a printed sheet onto solid, non-corrugated board, usually 600 gsm and above, for rigid boxes, book covers and game boards. It needs a different press configuration from flute lamination because solid board does not compress the way fluting does.
Can one machine do both film lamination and flute lamination?
No. The two machines have different feeding systems, different bonding sections and different accuracy requirements. A film laminator feeds one sheet stream against a film reel, while a flute laminator has to align two separate sheets, which needs a registration section a film laminator does not have.
Which lamination process to choose for retail display packaging?
Flute lamination, in almost every case. Retail displays and shelf ready packaging need offset print quality on a corrugated structure, which is exactly what mounting a printed top sheet onto corrugated board delivers. Film lamination may then be applied to the top sheet beforehand if scuff resistance is also required.
Why are lamination accuracy figures not comparable between machines?
Because they measure different things. A film laminator is specified on film overlap around the sheet edge, typically around 2 mm. A board laminator is specified on registration between two sheets, around 1 mm on corrugated and 0.5 mm on solid board. Comparing the numbers directly ranks machines that are not doing the same job.
Get the right lamination machine specified
Send your substrate, format and monthly volume, and our engineers will confirm which of the three processes your job mix needs before any machine is quoted. If the film lamination vs flute lamination answer points to a different type of machine from the one you asked about, we will say so. Request a quote.
