How to Laser Cut Custom Cardboard Shipping Boxes: Cut vs. Score Die-Lines, Flute Direction & Zero-Waste Packaging

Branded shipping boxes are one of the easiest add-on products for a laser shop, and one of the easiest to get wrong. The two classic mistakes are cutting right through a fold line and folding across the flutes so the board kinks. This guide covers both, then walks through three box styles you can make with our Custom Shipping Box Generator.

Pick the board

Corrugated board is a wavy middle layer (the flute) between two flat liners. Thinner E-flute is around 1.5 mm and folds neatly, which suits small mailers. B-flute is around 3 mm and is a good all-round shipping board. Thicker board is stronger but harder to fold cleanly. Thicknesses vary between suppliers, so measure yours with calipers and enter the real number in the generator: the walls and slots are sized from it.

Line up the flutes with your folds

Flutes are tubes. Board folds cleanly along the tubes and tends to crack or crush when folded across them. Where you can, place the sheet so the main fold lines run parallel to the flutes. In practice most boxes have folds in both directions, so put the longest or most important folds with the grain and expect the others to be a little rougher. A slightly deeper score helps the cross-grain folds.

Cut lines versus score lines

The generator draws two kinds of line, and they do different jobs:

• Cut lines (red) go all the way through: the outline, slots and tabs.
• Score lines (blue) only weaken the board so it folds where you want. The aim is to crease the top liner without burning through it. Too deep and the fold bursts the liner paper; too shallow and the board springs back and kinks.

A good starting point is the score layer in Perforation mode with Cut 5 mm and Skip 5 mm, which leaves uncut bridges so the liner holds while the board still folds easily. Power still depends on your machine and board, so there is no universal setting. Make a test card with the Laser Test Grid Generator, find the setting that creases without breaking through, and use that for the score layer. Run scores before cuts so the sheet is still held by its uncut outline while it is creased.

Three box styles

Multi Crease box

A cross-shaped sheet: a base with a wall on each side and open corners. Fold the four walls up and tape the corners, then fold the front and back flaps over the top to close it (the left and right flaps are shorter). Each wall has a base crease, then several wall creases: the first at your box height and the others a set gap further out. Fold the flap over at whichever crease suits the product, which is handy when items vary in height.

Roll-end tuck-top (RETT)

A mailer that needs no tape or glue. The side walls end in roll flaps that fold inward over the contents, and a small tongue on each flap pushes through a slot in the front and back wall to lock the box. The lid closes with a tuck flap that slides behind the front wall. The slots are cut slightly taller than your board thickness, which is why the thickness setting matters for this style.

Telescoping two-piece

A tray plus a lid that slides over it. Fold tabs on the side walls fold inside the end walls. They have no locking feature, so glue or tape them (double-sided tape works well) to hold the corners square. The lid is made slightly larger than the tray to leave clearance, 1.2 mm on each side in the generator, so it slides on without binding. If your board is thick or compresses when folded, you can open the fit up by adding to your inside dimensions.

Export to LightBurn

1. Enter your inside size and board thickness, and pick a style.
2. Choose the laser origin your machine uses in LightBurn (Edit → Device Settings → Origin).
3. Download the LightBurn file. Scores arrive on layer C01 and cuts on C02.
4. The speed and power in the file are placeholders. Set C01 to your tested score setting and C02 to a cut that goes cleanly through your board.
5. Run a prototype on cheap cardboard, fold it, and check the fit before cutting stock.

Prefer another program? Download the SVG instead: cuts are red and scores are blue, so you can map them to layers yourself.

Waste less board and price it properly

The generator reports the flat sheet size of each box. Feed that into the Material Cost & Waste Estimator to see how many boxes fit on a board and what each one costs. Remember to add the time you spend folding, taping and packing. Our post on the hours you don’t bill covers it. Looking for more free tools for jobs like this? See the best free laser tools roundup.