My First Resin Skull: A Glowing Blue Beauty!

I’m thrilled with how this turned out! This translucent blue skull was cast in epoxy resin using a simple skull mold and my homemade “sinker white” pigment. The result has beautiful swirling marbled effects, deep blue tones with lighter highlights, and a glossy, almost gem-like finish. Not too bad for a home experiment, right? The swirling patterns come from the way the white pigment interacts with the coloured resin during the pour and cure. It creates organic, smoky, veined effects that make each piece unique.Quick Rundown: How to Make a Coloured Epoxy Resin Skull with Sinker White

Materials you’ll need: Epoxy resin (deep pour or casting resin works best for thicker pieces like skulls) 
Silicone skull mold 
Mica powder or alcohol ink in your desired colour (I used blue tones here) 
Homemade or store-bought sinker white (a heavier white pigment designed to sink through the resin) 
Mixing cups, stir sticks, gloves, and a well-ventilated workspace 
Optional: heat gun or torch to pop bubbles 
 
Basic Steps:

Prepare your workspace and mix the epoxy resin according to the manufacturer’s instructions (usually 1:1 or 2:1 ratio by volume). 
Divide the mixed resin into separate cups if you want multiple colours or effects. 
Add your colour (mica powder or ink) to one portion and stir thoroughly until evenly distributed. For the blue effect, I tinted the main batch a vibrant translucent blue. 
Make or add your sinker white: This is a heavier white pigment that sinks slowly through the resin instead of staying suspended. You can make a homemade version by mixing a small amount of white pigment powder (or white alcohol ink) with a bit of resin or alcohol until it has a thick, heavy consistency. A little goes a long way! 
Pour the coloured resin into the mold first, filling most of it. Then drizzle or drop small amounts of the sinker white mixture in strategic spots (or swirl it in gently). The white will sink and create beautiful tendrils, blooms, and marbled veins as it moves through the blue resin. 
Tap the mold gently or use a heat gun to remove air bubbles. 

Let it cure fully (usually 24–72 hours depending on your resin and temperature). 
Demold carefully and admire your one-of-a-kind skull! You can sand or polish the surface if needed for extra shine. 
 
Tips for success:Work in thin layers or all at once depending on your mold depth. 
The more sinker white you use and the way you drop it, the more dramatic the swirls become. 
Always follow safety precautions — wear gloves, work in a ventilated area, and protect your surfaces. 
 
This technique is forgiving and endlessly customizable. You can create everything from ghostly whites to vibrant jewel tones. I’m already planning my next colour combo!

What do you think — would you try making one? Drop a comment or tag me if you give it a go!