Triangular carton
ECMA C10.10.20.20
Three walls glued into a tube, a triangular lid with a tuck flap at each end.
- Example size
- 60 × 52 × 180 mm internal
- Blank
- 202 × 295 mm
- Pieces
- 1 blank
- Board choices
- 12 boards, 0.45 to 7 mm
Free to design and to check in 3D. €2.50 for the PDF, €3.50 for the DXF or SVG.
What this box is, in other words
Chocolate and nougat bars with a triangular section, pencils, rolled posters and small gifts. The box stands on one flat wall and has two sloping faces to print on.
How it closes. Three walls are glued into a tube. At each end a triangular closing panel folds over and its tuck flap slides down inside one wall. The two tuck flaps go behind different walls, and never behind the wall with the glue seam.
Worth knowing. The corners are 60 degrees, sharper than any other box here. Thin carton board and E-flute fold that cleanly; thick corrugated crushes in the corner, and the tool warns above 3 mm.
Also called
triangular box triangle box prism box triangular carton chocolate bar box pyramid box triangle prism chocolate bar pyramid toblerone shape
Same construction, different trade. If you came looking for one of those, this is it.
How this one is built
- Triangular tuck carton (ECMA C10.10.20.20): three walls glued into a tube, a triangular closing panel with a tuck flap at each end.
- The walls fold 120 degrees each. Every closing-panel edge except the hinge is 1.70 mm inside the wall, so the tuck flap slides down behind its wall without rubbing.
- The tuck flaps go behind different walls, and never behind the one with the glue flap.
Board options
The drawing changes when you change the board: thickness compensation is built into every fold, so a 4 mm C-flute blank is not the same shape as a 0.45 mm carton blank.
- F-flute corrugated (0.8 mm)
- E-flute corrugated (1.5 mm)
- B-flute corrugated (3.0 mm)
- C-flute corrugated (4.0 mm)
- EB double wall (4.5 mm)
- BC double wall (7.0 mm)
- SBS / GC1 board 350 gsm (0.45 mm)
- FBB / GC2 board 400 gsm (0.55 mm)
- Kraft / GD2 board 400 gsm (0.50 mm)
- Greyboard 1.0 mm (rigid)
- Prototype board 1.0 mm
- Prototype board 2.0 mm
Questions about this box
- What is the ECMA code for a triangular carton?
- ECMA C10.10.20.20: group C (cartons with more or fewer than four sides), base 10 for a triangle, and 20.20 for a tuck closure at both ends.
- Which size do I enter for a triangular box?
- The inside length of one side of the triangle, and the height of the tube. A round product of diameter D needs a side of 1.73 x D, and then 40 % of the section is empty. A square one of width A needs a side of 2.15 x A.
- Is this dieline free?
- Designing it and folding it in 3D are free and need no account. Downloading it is paid: €2.50 for the PDF to print and measure on paper, and €3.50 for a production file - DXF or SVG - because those are the ones that go to a cutting table.
- What is a dieline?
- The flat drawing a box is cut from. It shows where the knife cuts, where the board is creased to fold, and where it is perforated. A die maker turns it into a steel rule die; a plotter or laser cuts it directly. It is also written as "die line" or "die cut template".
- What file format does a die maker need?
- DXF, almost always. Ours is R12 DXF at 1:1 in millimetres with cut, crease, reverse crease and perforation each on their own layer, which is what a cutting table expects. The SVG is the same geometry for Illustrator, Affinity, Inkscape and laser software.
- Can I use it commercially?
- Yes. The files are yours: modify them, print them, make any number of boxes from them. No attribution and no licence fee, ever.
What you can change
3 parameters on the first screen, 6 more behind advanced settings.
- Side (W) — Inside length of one side of the triangle.
- Height (H)
- Board caliper (t)