Week 3 Laser Cut Mold – SCOPES-DF

Lesson Details

Age Ranges
Fab Tools
Fab-Modeling.1, Fab-Design.1

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Chris Ludwig
Chris Ludwig
Fablab manager


Use a laser cuter to create a mold with acrylic

What You'll Need


Laser Cutter



Acrylic Sheet (3mm clear used here)




Cutting software (Lightburn used here)


Basic image of your choice

Lesson Materials

The Instructions

Selecting a file & converting to a vector

Use Inkscape to convert a simple rastor image into a vector

Import an image of your choice

Select Path > Trace Bitmap

Right click image > Fill & Stroke > Stroke Paint > select fill & make sure color is set (in this case I set the stroke color to black



Select Stroke Style and set width to 1 px


Save svg file

Import SVG file and prepare for cut

Prepare vector image for cutting

Import SVG into your cutting program (Lightburn in this case)


Select the appropriate speed and strength (100% and 5 mm/s for this machine)

Cut out mold

Load material & perform cut

Load the material into laser cutter


Select the appropriate settings for your laser cutting device


Select cut


Remove finished product




Note: I experimented with cutting an outline as an alternative mold, but that is not a requirement.

Create the biomaterial

Following the recipe, create a (hopefully) jiggly biomaterial

Agar Agar Recipe:

150 ml of water / 16 g of agar agar / 8 ml of glycerin / dash of tumeric for color. 


We were aiming for a springy mixture. Adding less agar agar will be fine and will result in a more stiff final product.


Instructions: Add the water and agar agar in cold to the pot. Heat the mix to a medium temperature while stiring slowly. 


Add the glycerin and tumeric. Allow the mix to simmer and pour into the mould once it has begun to harden.