Resin can do amazing things, and sometimes the best additives are the ones you create yourself! Sinker white is a heavier white mixture that helps push alcohol inks or colours down through your resin, creating beautiful sinking blooms and effects (like the vibrant pink-and-white piece shown below).
Here’s the simple formula that worked well for the example in the photo:
What You’ll Need:100% pure acetone (or 100% acetone nail polish remover)
99%+ Isopropyl alcohol (IPA)
White pigment paste (resin-compatible)
Small mixing cups, stir sticks, and droppers
Gloves, eye protection, and good ventilation
Basic Ratio (start small and test): In a small cup, add a small amount of white pigment paste (start with ½–1 teaspoon).
Add a few drops of 100% acetone to break down the pigment paste. Stir well until smooth. The acetone helps the paste disperse.
Top up with isopropyl alcohol (roughly 70% alcohol to 30% acetone ratio overall). Stir thoroughly until fully mixed and pourable.
The exact amounts can vary depending on your pigment thickness and resin viscosity — start small and adjust until you get a milky white liquid that sinks nicely when dropped into resin.
Safety First:Work in a well-ventilated area (acetone and alcohol fumes are strong).
Wear nitrile gloves and eye protection.
Never mix large batches at once. Test in small quantities.
Keep away from open flames — these are flammable.
Label your container clearly and store in a cool, safe place.
Once mixed, you can drop your homemade sinker white into coloured resin pours to create sinking effects and patterns. Tomorrow I’ll demold the piece in the photo and we’ll see how this batch turned out — fingers crossed!
Have you tried making your own resin additives? Share your results or tips in the comments.
Stay safe and keep creating!
Magdelene
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