Reading an MDF Data Sheet: Size, Tolerance and Base Board
A fibreboard data sheet carries six or seven fields, and most disputes begin on the one nobody read properly. Dongstar prints seven thickness steps — from 2.7 mm and 3 mm to 6, 9, 12, 15 and 18 mm — inside a 2 mm to 30 mm window, quotes tolerance from ±0.2 mm to ±0.5 mm, and offers the 2100 × 2500 mm format only at 9 mm and below. Each field answers a different question on site.
Key takeaways
- Seven steps are printed inside the window: 2.7, 3, 6, 9, 12, 15 and 18 mm, with further sizes made on request.
- The 2100 × 2500 mm format is offered at 9 mm and thinner; below that figure the 1220 × 2440 mm sheet is the default.
- Tolerance of ±0.2 mm to ±0.5 mm is the field that decides pallet height and whether panels sit flush.
- The base board — raw, MHR MDF, FR MDF or HDF — is written on the sheet and should be written on the order.
Six fields, and only two of them carry the argument
A specification for a decorative panel is short: sheet size, thickness, tolerance, base board, face material and packing. Buyers tend to negotiate on face colour because it is the field they can picture, then discover that the argument which matters was over thickness and core. Nothing on the list is optional. A quote that states four fields out of six is a quote that will be resolved by whoever opens the container.
On a decorative Medium Density Fibreboard sheet, the order of reading matters as much as the content. Size sets the cutting yield, thickness sets the rigidity and the load a shelf can carry, and tolerance decides how several hundred sheets stack. Base board and face material then decide whether the panel survives the room it is installed in. Certification sits across all of it, and the listed set for this board is ISO, CE, CARB and FSC.
Size: two formats and the thickness rule that gates one
Two footprints appear on the sheet, and they are not interchangeable. The 1220 × 2440 mm sheet is the everyday format that fits a cutting list built for kitchen and furniture work. The 2100 × 2500 mm sheet is larger and is quoted for boards of 9 mm or less, so it belongs to backings, linings and skins rather than to a carcass program. A buyer who plans a 15 mm job around the big format has planned around something the range does not offer.
Reading a data sheet is easier once that kind of condition is visible, because conditions tell you which way the mill expects the product to be used. A format limited by thickness is telling you it exists for flat, wide, thin coverage. The smaller format carries no such limit, which is why it appears in every part of the range from 2 mm to 30 mm and why most sample requests are cut from it.
Thickness: seven printed steps inside a wide window
The window runs from 2 mm to 30 mm, and seven steps are named: 2.7, 3, 6, 9, 12, 15 and 18 mm. Boards between those steps are made on request, which is normal for a press that has to be set up for a run. For a buyer, the practical effect is that a drawing at 18 mm is a straightforward order while a drawing at 20 mm starts a conversation about volume and lead time.
Those seven figures also describe a set of jobs rather than a set of sizes. The thin steps are skin and backing material, the middle steps are linings, partitions and door leaves, and the upper steps are carcasses, shelves and work surfaces where a screw or a hinge has to hold. Naming the job first and the thickness second is how the sheet is meant to be read.
Tolerance: read it as a band, never as one number
A ±0.2 mm to ±0.5 mm figure is often quoted by suppliers as though it were a single value. It is a band, and the difference between its two ends is 0.3 mm of thickness on every panel. That gap is invisible on one sheet and unavoidable in a stack, because it accumulates: the same nominal order can produce pallets of noticeably different heights depending on which end of the band the boards land on.
On a machined joint the band shows up as a visible line. Two panels laminated into a thicker section can finish 0.4 mm narrow or 0.4 mm wide across the pair (example), and an edge-banding line set to one exact thickness will either ride proud or sit short. Where the tolerance actually needs to be tight — a laminated stack, a flush countertop, an exposed joint — the reasonable move is to say so in the enquiry rather than to assume it.
Base board and face: the fields that get skipped
The base board is chosen before the decor, not after. Four cores are listed for this range: raw MDF, a green moisture-resistant MHR MDF, a red fire-retardant FR MDF, and a black HDF. The face then goes on top — nothing, or melamine paper, HPL, PVC or leather, on one side or both. The combination is the product, and the printed surface treatments are matt, textured, glossy, embossed and magic.
Skipping the core is expensive because it cannot be corrected later by a decorative face. A green core in a wet room and a red core in a fire-briefed corridor are decisions made at specification stage; a black HDF surface under heavy traffic is another. Buyers comparing this board with chipboard panels for carcass work are really choosing between two cores and two edges, so the model number should carry the base board, not just the colour.
| Field | Printed on the sheet | What it settles on site |
|---|---|---|
| Sheet size | 1220 × 2440 mm; 2100 × 2500 mm at 9 mm and below | Cutting yield and how many joints a lining will have |
| Thickness steps | 2.7, 3, 6, 9, 12, 15, 18 mm within a 2–30 mm window | Rigidity, shelf span and screw holding |
| Thickness tolerance | ±0.2 mm to ±0.5 mm | Pallet height, joint width, laminating lines |
| Base board | Raw MDF, moisture-resistant MHR MDF, fire-retardant FR MDF, black HDF | Humidity, fire brief and wear resistance |
| Face | Plain boards in melamine paper, HPL, PVC or leather, finished matt, textured, glossy, embossed or magic | Appearance and cleaning regime |
Worked example: what 200 sheets of 18 mm actually measure
A workshop plans a pallet run of 200 sheets at a nominal 18 mm. At the nominal figure the stack is 200 × 18 = 3,600 mm, or 3.6 m of board (example). Now run the same 200 sheets at the loose end of the published band, 18.5 mm each: 200 × 18.5 = 3,700 mm, which is 3.7 m (example). The difference is 100 mm of height on one pallet, before banding, bearers or a pallet base is counted.
At the tight end of the band the same run measures 200 × 17.8 = 3,560 mm (example), so the spread between the two extremes across a single order is 140 mm — three times the thickness of the board the stack is made from. When quoting rack or van space, that spread is worth knowing, and it is also the reason a site that measures one sheet and multiplies will be wrong more often than right.
Frequently asked questions
Why does the data sheet name seven thicknesses instead of a range?
Because the named steps are the sizes ordered often enough to keep in production, while the outer window of 2 mm to 30 mm describes what the press can make. Boards between the steps are quoted on request, usually with volume and lead time attached.
Is the large format available in every thickness?
No. The 2100 × 2500 mm sheet is quoted for boards of 9 mm and less, which points it at backings, linings and skins. For thicker panels the format on the sheet is 1220 × 2440 mm, and that is the one to build a cutting list around.
Where does the base board appear in the specification?
It should appear on every order line. Raw MDF, MHR MDF in green, FR MDF in red plus HDF as standard in black are four different products, and once a decorative face is applied the difference is no longer visible from the edge of a stack.
Write the specification before you write the order
Six fields, filled in once and sent as one page, remove more risk than any negotiation over a colour code. The people who assemble this board know the difference between the four cores in the group's own background and in their application notes, and the same sheet structure repeats across the rest of the panel range. Buyers who compare two quotations field by field usually find that the cheaper one is missing something written down.
Source for the figures above: the supplier's website, read 29 Sept 2026, as the source for this article[1].