---
title: Make a model to replicate
slug: make-a-model-to-replicate
step: 2
howto: make-plaster-moulds-for-large-products
tags: ["product","injection","extrusion","mould"]
category: Moulds
difficulty: Medium
time: < 1 week
location: 
---
# Step 2: Make a model to replicate
You will need a model or object to cast your plaster mold around. This could be anything, such as a model you made, a 3D print, or a toy. Consider how many parts your mold requires. Our product necessitated a two-part mold.

In this instance, the desired shape was cut out of foam using a homemade hot wire and hand sanding.

Pay close attention to the surface finish. Any small bumps or dents will be visible in the final product. If necessary, continue sanding, filling, and painting.
![IMG_3506.jpg](/resources/howtos/make-plaster-moulds-for-large-products/img_3506.jpg)
![IMG_3587.jpg](/resources/howtos/make-plaster-moulds-for-large-products/img_3587.jpg)
![IMG_3519.jpg](/resources/howtos/make-plaster-moulds-for-large-products/img_3519.jpg)