# A print that's also a set of instructions > Dashed fold lines, glue tabs and numbered edges are a design that expects to be cut out. Printed on a chest, they're the only graphic that implies an action the wearer can't perform. August 17, 2026 · https://justog.club/stories/paper-model-kit-instruction-art A papercraft sheet is a flat drawing of a three-dimensional object, unfolded. Solid lines mean cut, dashed lines mean fold, and the little tabs mean glue. Printed on cotton, all of that becomes a joke — the instructions are perfectly clear and completely impossible to follow. ## Why is that funny rather than annoying? Because the design is sincere and the situation isn't. Nothing about the sheet is winking. It's a real papercraft layout, drawn correctly, with tabs numbered to match their slots. The comedy is entirely in the substrate: it's on a shirt, so it can never be built, and the more accurate the layout the funnier that gets. Same structure as [a hazard label as a costume](/stories/halloween-costume-shirt) — borrow a functional format, put it somewhere it can't function. ## What are the conventions? Five, and they're all functional marks rather than decoration. - **Solid cut lines** as the outer boundary of every piece. - **Dashed fold lines**, sometimes dash-dot for a valley fold versus a mountain fold. - **Glue tabs** — small trapezoids projecting from edges. - **Numbered edge pairs**, so tab 7 knows it meets slot 7. - **Flat colour** printed inside the cut shapes, often slightly misregistered. The misregistration is worth asking for. Cheap kits were printed slightly off, and that half- millimetre of colour bleeding past the line is what makes it read as a real sheet. ## What should the model be? Something with recognisable unfolded geometry. A castle, a lighthouse, a small house, a van, an animal made of flat planes. The unfolded form has to be readable *as* an unfolded thing — a viewer should be able to half-assemble it in their head, which is where the pleasure is. Very complex subjects turn into abstract shapes and lose the joke. The best ones are simple enough that you can see the roof. ## Can I use a real kit? No — published papercraft sheets are the designers' work, and many kits are of licensed subjects on top of that. The format is free. Cut lines, fold lines, tabs and numbered edges are technical conventions from packaging and model-making, not anyone's property. An invented model is also more interesting — a papercraft sheet for something nobody would ever make a kit of is where this register gets good. ## Does it need instructions text? A little, and it should be flat. `1. CUT ALONG SOLID LINES · 2. FOLD ON DASHED · 3. GLUE TABS TO MATCHING NUMBERS` in small capitals along the base completes the artefact. It's the same device as [a step number on an assembly diagram](/stories/mecha-instruction-manual-style): a procedural line implying a whole document. Keep it as one strip. More than that and the design becomes text-led rather than diagram-led. ## Why does it print well? Because it's flat shapes with hard edges and dashed lines — all high contrast, no gradients. Dashed lines are the one thing to watch: if the dashes are too fine they fill in and become solid, which destroys the entire cut-versus-fold logic. They want to be chunkier than they'd be on paper, [above the resolution of the weave](/stories/bold-shapes-survive-fabric). Print it large. The layout needs room for the pieces to sit apart. ## Is there a version somebody could actually build? Yes, and it's the best gift version of this. The same design printed on paper, given alongside the shirt, means one person can build the thing the other is wearing. That's a two-object joke with a genuinely nice payoff, and the artwork does double duty. ## How do I get one made? Describe the model at [JustOG](/) — what it is when it's assembled — and say it should be a papercraft cut-out sheet. Pick a direction, drag the crop frame, see it composited on the real garment, and it's made to order and shipped. Designs other people have published are in the [shop](/shop). Every line tells you what to do. You can't do any of it.