Summary of "Cardboard Prototyping | Techniques"

Brief summary

A short how‑to on cardboard prototyping: why it’s useful and a set of practical techniques to make clean, functional, attractive prototypes. Cardboard prototyping is rapid and inexpensive, letting you visualize form and function at full or partial scale before committing to CAD, 3D printing, or machining.

Tip: score before cutting or folding for neater results and less fraying.

Materials and tools (recommended)

Cutting mat
Metal ruler
Sharp box cutter or X‑Acto knife
Hot glue gun
Lots of cardboard
(Optional) paper clips or pins for rotation/hinge points

Core cutting and shaping techniques

Use a metal ruler as a guide for straight cuts to keep edges clean.
Score first, then cut fully:
- Make a partial cut or shallow groove before finishing the cut to reduce fraying and get cleaner edges.
Curves:
- Use another object (cup, lid, template) as a guide and score the curve path first.
Folding:
- Score along the outside of a fold to allow a sharper, neater bend.
Flexible/curved surfaces:
- Score along the corrugations to make cardboard bendable. The spacing of the score lines controls the achievable radius (closer scores = tighter curves).

Joining and structural techniques

Interlocking scores:
- Score matching slots or tabs and slide pieces together for a clean, delicate hold without glue.
Tabs:
- Create tabs (by cutting and folding) and glue them to attach pieces more strongly and conceal joints.
Slots:
- Cut complementary slots in two parts and interlock for strong, accurate joins.
Hot glue:
- Fast and reliable for permanent joins—watch for glue strings and use sparingly for neatness.
Lamination:
- Stack and glue multiple layers of cardboard to increase thickness and rigidity where needed.
Simple hinges/rotation points:
- Use paper clips or pins as low‑tech rotation points when a pivot is required.

Texturing and novel tricks

Compress or “squish” corrugated cardboard to make it flatter and more flexible where needed.
Hide or reveal corrugations intentionally to create visual or tactile contrast between different components.
Combine techniques (for example, scored curves with tabs, or laminated parts with slots) to get both the look and strength you need.

Process advice and creative concepts

Purpose: use cardboard prototyping to test scale, fit, ergonomics, and quick function before moving to CAD or production methods.
Experiment with on‑hand materials and everyday objects as guides or jigs to speed up work and inspire unexpected solutions.
Iterate: combine and repeat techniques (lamination + slots, scored curves + tabs, etc.) to refine appearance and structural performance.
Small, neat edits (careful scoring, tidy glue application) make prototypes look intentional and improve communication with teammates or clients.