---
title: Make A4 size clipboard
slug: make-a4-size-clipboard
description: Create a bespoke clipboard from repurposed plastic. Board dimensions: 12.4x9.1 inches (315x230 mm) with a thickness of 0.2 inches (5 mm) and four corner radii of 0.3 inches (R8).
tags: ["mould","compression","HDPE"]
category: Products
difficulty: Easy
time: < 5 hours
location: Liberec, Czechia
---
import { Image } from 'astro:assets'
# Make A4 size clipboard
<Image src={import('./clipboard.jpg')} alt="Make A4 size clipboard" />
Create a bespoke clipboard from repurposed plastic. Board dimensions: 12.4x9.1 inches (315x230 mm) with a thickness of 0.2 inches (5 mm) and four corner radii of 0.3 inches (R8).

User Location: Liberec, Czechia
## Steps
### Step 1: Prepare your mould

I provide 3D data and blueprints for personal use. Material: steel, thickness: 5 mm (0.2 inches).

Recommended mold fasteners:
- M6x45 (1.77 inches) bolts (minimum 4)
- M6 washers
- M6 nuts

### Step 2: Prepare material + mould

### Clipboard Production Guide

I have tested HDPE, PP, and PLA with satisfactory outcomes. Experiment with various colors and bottle cap designs. You will need approximately 320-350 grams (11.3-12.3 ounces) per clipboard. 

Before experimenting with new materials, document the quantity used for reference in future production.

Ensure the mold is free of impurities, dust, or residual plastic from prior use; smooth sandpaper is effective for this task. Apply a mold release agent or oil to prevent sticking, ensuring the oil's smoke point exceeds 230°C (446°F). 

For further details on oil smoke points, consult Wikipedia.


<Image src={import('./material.jpg')} alt="material.jpg" />


<Image src={import('./coca.jpg')} alt="coca.jpg" />

### Step 3: Baking + pressing

I use an IKEA Görlig electric oven. Adjust the temperature according to the material type. For HDPE and PP, I set the temperature to 225°C (437°F). Place the mold in the oven for 35 minutes and set a timer.

Attention: Use heat-resistant gloves when handling the mold from the oven.

After baking, press the mold. The cooling process takes 20-30 minutes. Opening the mold earlier may risk deformation.


<Image src={import('./Snimek5_40y4-uz.png')} alt="Snímek5_40y4-uz.png" />


<Image src={import('./Snimek6_vimf-i4.png')} alt="Snímek6_vimf-i4.png" />

### Step 4: Postprocessing

Trim the edges with a knife. Sand the surface if needed. Drill two M4 (0.157 inch) holes according to your clip design. Screw-type rivets are recommended for easy and tool-free modifications to the board with clips.

Rivet sizes:
- A: 4mm (0.157 inch)
- B: 6mm (0.236 inch)
- C: 10mm (0.394 inch)
- S: 4mm (0.157 inch)


<Image src={import('./2.jpg')} alt="2.jpg" />


<Image src={import('./3.jpg')} alt="3.jpg" />


<Image src={import('./sroubovaci-nyt-na-popruhy-duhovy.jpg')} alt="sroubovaci-nyt-na-popruhy-duhovy.jpg" />

### Step 5: Follow Plastmakers

For more open-source content, please consider engaging through sharing, subscribing, liking, following, or commenting.

More information is available here: [linktr.ee/plastmakers](https://linktr.ee/plastmakers)

Thank you.

Tom


<Image src={import('./coca_cola.jpg')} alt="coca cola.jpg" />


<Image src={import('./clipboard.jpg')} alt="clipboard.jpg" />