---
title: Create a lamp with translucent HDPE
slug: create-a-lamp-with-translucent-hdpe
description: Hello, we created a lamp to explore translucent HDPE properties. By sorting shredded transparent and colored bottle caps, you achieve a liquid-like effect. The key is in your color choice, allowing for diverse visual outcomes.
tags: ["injection","product","HDPE"]
category: Products
difficulty: Medium
time: < 5 hours
location: Donostia / San Sebastian, Spain
---
import { Image } from 'astro:assets'
# Create a lamp with translucent HDPE
<Image src={import('./Argitu-186cae2dcf4.jpg')} alt="Create a lamp with translucent HDPE" />
Hello, we created a lamp to explore translucent HDPE properties. By sorting shredded transparent and colored bottle caps, you achieve a liquid-like effect. The key is in your color choice, allowing for diverse visual outcomes.

User Location: Donostia / San Sebastian, Spain
## Steps
### Step 1: Sorting and Shredding

Collect HDPE bottle caps from a local source. To achieve a liquid-light effect for your lamp, use both transparent and colored caps. Adding a small amount of shredded colored plastic will tint and alter the final appearance. Sort and shred the plastic carefully.


<Image src={import('./SORTING_1-186cb03e4a8.JPG')} alt="SORTING_1-186cb03e4a8.JPG" />


<Image src={import('./SORTING_2-186cb040342.JPG')} alt="SORTING_2-186cb040342.JPG" />


<Image src={import('./SORTING_4-186cb04d62f.JPG')} alt="SORTING_4-186cb04d62f.JPG" />

### Step 2: Injection moulding

In the initial image, the light bulb is positioned between two discs. Begin by creating the discs using injection molding. The mold has a thin wall thickness of 3 millimeters (0.12 inches). Refer to the Academy for melting temperatures for HDPE. Experiment with various color combinations. Each disc requires less than 30 grams (1.06 ounces) of material, so adding 3 or 4 grams (0.11 or 0.14 ounces) of color will suffice to tint the plastic.


<Image src={import('./MOULD_2-186cb095ed3.JPG')} alt="MOULD_2-186cb095ed3.JPG" />


<Image src={import('./MOULDING-186cb4be2bc.JPG')} alt="MOULDING-186cb4be2bc.JPG" />


<Image src={import('./COLOURS-186cb0ff52a.JPG')} alt="COLOURS-186cb0ff52a.JPG" />

### Step 3: Laser cut

The clamp for the discs is constructed from wood. We utilized a laser cutting machine at a local makerspace to produce the wooden components. The wood is 0.39 inches (1 cm) thick, and the CAD drawings are included in the download package. The clamp is tailored to accommodate a specific lamp holder and bulb, but you may adjust the design for lamp holders available at local stores. The wooden pieces were later spray-painted.

A small square indentation must be cut from the disc to allow it to attach to the wooden part securely. This feature enables you to swap out discs without using adhesive, facilitating various lighting effects.


<Image src={import('./MOUNT-186cb1e46e2.JPG')} alt="MOUNT-186cb1e46e2.JPG" />


<Image src={import('./Laser_cut-186cb1fb967.JPG')} alt="Laser cut-186cb1fb967.JPG" />


<Image src={import('./ZURA_MARGOTU-186cb222c4a.JPG')} alt="ZURA_MARGOTU-186cb222c4a.JPG" />

### Step 4: Assembling the light and finding a place for it. 

Assembling the lamp should be quick, as all parts are designed to fit securely. If the structure is unstable, apply glue for reinforcement. You can place it on a bedside table, a desk, or hang it. We would appreciate seeing your completed work.


<Image src={import('./AG_1-186cb3a5f72.JPG')} alt="AG_1-186cb3a5f72.JPG" />


<Image src={import('./AG_2-186cb3a6efd.JPG')} alt="AG_2-186cb3a6efd.JPG" />


<Image src={import('./AG_3-186cb3a8044.JPG')} alt="AG_3-186cb3a8044.JPG" />