Glow in the Dark Ghost Earrings for Halloween : 8 Steps

You will need:

Glow in the dark DLP\SLA resin for 3D Printers: this is the most important ingredient! I tested many of them and the best is definitely the ART GLOW from Harz Labs. You can find it here:
https://www.lumindustries.com/3dresins/hzartglow

A resin 3D printer: I used a LumiCUBE (https://www.lumindustries.com/lumicube) but you can use any resin based 3D printer.

Materials for cleaning the 3d part: IPA or less toxic cleaning materials. Always wear gloves when handling these liquids.

Earring hooks

Step 1: Find a Suitable 3D Model (free)

You can find 3D models (even free to download) online.

Best places to look for are:

thingiverse
yeggi
cults3d

I found a cool 3d model of a ghost here: https://cults3d.com/en/3d-model/home/motorized-hal...

Step 2: Add the Ring on the Top of the Ghost

To use it as an earring, you will need to add a ring on the top of the ghost.

You can use any CAD program to do this, I used Solidworks, but there are a lot of free alternatives, from Sketchup, to OpenCAD.

At the end, save the file in STL file format.

Step 3: Prepare Files for 3D Printing With Resin

With a software like Chitubox (free), open the 3d file, add the supports, and clone it in order to cover the whole building plate area.

On my 3D printer, I was able to put 15 of them for a single print job.

Step 4: 3D Print It!

This step depends on your 3D Printer. Usually it involves:

using an USB drive to take the sliced 3D files from your computer to the 3D printer
turning on the machine, adding the resin (well stirred\mixed!)
installing the build tray
Start the 3D print job
removing the 3D printed parts
cleaning the 3D printed parts
post curing the 3D printed parts

Step 5: Clean the 3D Printed Parts

You can use IPA (works best, but is a liquid that must be handled professionally), or less toxic liquids.

Always wear gloves and mask/glasses when handling them.

Clean the 3D parts until they are dry to the touch and not "sticky".

Step 6: Post Curing the 3D Parts

Post curing is very important to make the 3D parts solid, and for the material to get its final properties.

You can use an UV oven designed for 3D Printing or a more homemade solution like those UV ovens for nail polishing. Post curing times go from a few minutes to up to 15-20 minutes.