In this video, I’ll show you how to make a Picture Frame 3.0 entirely from upcycled cardboard. Building on previous versions, this design introduces a sloped inner frame, creating a more refined and architectural look. The structure is significantly more complex than before, but the result is strong, clean, and visually elegant — while staying true to sustainable principles. This project explores how far cardboard can go when we fully understand its structure and use it intentionally. 📐 Template A4 Printable 1/2 Scale PDF Template is available on: https://itoshige.com/for-makers/desig... Shadow Box Frame • [Cardboard DIY] How to make a Shadow Box F... Picture Frame 2.0 • [Cardboard DIY] Picture Frame 2.0! How to ... Picture Frame 1.0 • [Cardboard crafts | DIY] Handmade Picture ... ⸻ 🎯 Highlights • Sandwich structure allows you to freely swap artwork or cards • Works with different cardboard thicknesses • Deep frame design allows the piece to stand on its own 📍 Chapters 00:00 Intro/Highlights 02:43 Title 03:16 Part 1 Top & Bottom Part 09:02 Part 2 Side Part 14:39 Part 3 Gluing 18:42 Part 4 Assembly 20:20 Result 21:25 20 design templates in the book (promo) ⸻ 📏 Project Specs Finished Size: (Fits 130mm x 180mm card) 7mm thick: H196mm x W146mm x D50mm 4mm thick: H188mm x W138mm x D50mm Material: 7mm thick cardboard : Approx.600mm x 400mm 4mm thick cardboard : Approx. 600mm x 400mm Additional: Transparent panel (130mm x 180mm, Optional) Estimated Work Time: 1 hours with template Level: Intermediate ★★☆ 🛠️ Tool List *As an Amazon Associate, I earn from qualifying purchases. BASIC SET OLFA CUTTER LARGE https://amzn.to/4doqc3L OLFA CUTTER BLADE 18mm https://amzn.to/4m7ZUVD 300mm Metal Ruler https://amzn.to/3O5sWIT 150mm Metal Ruler https://amzn.to/4c80hLy Cutting Mat https://amzn.to/3PRKfOj Sash Spatula (not the same as I use but still recommend) https://amzn.to/4ttglyo Embossing Stylus https://amzn.to/4vcrEwA Glue (PVA) (not the same as I use but still recommend) https://amzn.to/48mOXK7 PRECISION SET Tweezers https://amzn.to/3QjwKqI Caliper https://amzn.to/4sUjF5P Bone Folder https://amzn.to/4sRMOhQ Small Cutter Knife https://amzn.to/4vcd9ca Hand Roller https://amzn.to/3NHDj5O --- 📘 Get My Template Book on Amazon Make 20+ cardboard furniture & storage projects with ready-to-use patterns: • [EN] “CARDBOARD DIY by ITOSHIGE STUDIO” https://www.amazon.com/dp/8409713438 • [ES] “Artesanía en cartón por ITOSHIGE STUDIO” https://www.amazon.com/dp/8409713748 • [JP] ダンボールで作るミニ家具&収納 (Kindle版) https://amzn.asia/d/aQE7k3U ⸻ 🧰 How to Work with Corrugated Cardboard Series: • Vol.1: 3 Cutting & Shaping Basics • Turn On Subtitles/CC | How To Work With Ca... • Vol.2: Covering Corrugated Edges (Grooves & Tabs) • Turn On Subtitles/CC | How To Work With Ca... • Vol.3: 3D Assembly & Construction • Turn On Subtitles/CC | How To Work With Ca... ⸻ 📡 Follow ITOSHIGE STUDIO Official Site: https://itoshige.com Instagram: / itoshigestudio Pinterest: / itoshigestudio X: https://x.com/itoshigestudio Tiktok: / itoshige_studio