ECMA A20.20.03.01
Reverse tuck end carton: blank size formula and dieline
The folding carton you find on a pharmacy shelf: a glued tube with a tuck flap at each end. The two tuck flaps hinge on opposite faces, which lets the blanks nest closely on the sheet.
Blank size calculator
The formula
| Blank length | 2L + 2W + 4t + g |
|---|---|
| Blank height | no exact formula: use the calculator |
- L, W, H
- internal length, width and height
- t
- board caliper (0.45 mm for 350 gsm SBS)
- g
- glue flap width: 14 mm by default
Around the carton the panels are L, W, L, W, each one caliper wider than the inside, plus the glue flap: 2L + 2W + 4t + g.
The height of the blank has no exact formula. The tuck flap and the dust flaps are capped so they fit the carton, and that cap changes the height by up to 15 mm. Use the calculator for it.
Example. 90 × 45 × 160 mm inside on SBS / GC1 board 350 gsm (t = 0.45, g = 14): blank 285.8 × 307.35 mm.
Per board
The same 90 × 45 × 160 mm inside on each board. Thicker board means a bigger blank for the same inside size.
| Board | t (mm) | g (mm) | Blank (mm) |
|---|---|---|---|
| SBS 350 gsm | 0.45 | 14 | 285.8 × 307.35 |
| FBB 400 gsm | 0.55 | 14 | 286.2 × 307.65 |
| Kraft 400 gsm | 0.5 | 14 | 286 × 307.5 |
| Greyboard 1.0 mm | 1 | 14 | 288 × 309 |
In the generator
Not to be confused with
- ECMA A20.20.03.03
- Straight tuck: both tuck flaps on the same face.
Questions
- Reverse tuck or straight tuck?
- With reverse tuck, every second blank can be turned round and slotted into the next one on the sheet, so there is less waste between them. Straight tuck has both flaps on the same side, so the front face is clean at both ends.