How Do You Remove Air Bubbles from Resin?

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If you’ve ever spotted annoying bubbles trapped inside your resin doll casts, you know how frustrating it can be. Tackling air bubbles is a key step for achieving a smooth, professional result.

Why Do Air Bubbles Occur in Resin?

Bubbles form naturally when resin is mixed or poured, particularly if the resin is thick or stirred too vigorously. Any trapped air can rise during curing, causing unwanted imperfections in doll parts or fine mould details.

Practical Bubble-Removal Methods

• Pour slowly: Carefully decant resin into moulds to reduce new bubbles forming.
• Tapping moulds: Gently tap mould sides on your work surface to help bubbles move upwards and release.
• Detail tools: Use a cocktail stick or toothpick to encourage stubborn bubbles to the surface.
• Careful heating: A heat gun on a low setting or even briefly waving a flame across the surface (with great care) can help break surface bubbles. Avoid prolonged heat to prevent resin damage.

When Bubble Removal Matters Most

Bubbles are especially troublesome when crafting detailed resin dolls or using transparent finishes, where clarity and precision are vital. Choosing a resin with higher fluidity, such as IWhite Polyurethane Casting Resin, can help minimise bubbles from the start.

Related products

• “IWhite” – Polyurethane Casting Resin – White, Fast-Curing Two-Part System
• "ICreation" – Fast Epoxy Resin, 6h Demoulding, Transparent Gloss Finish
• "One-2-One" – Epoxy Resin for Handcraft, 1:1 Mixing Ratio

Related guides

• How To Make A Resin Doll
• How To Make Little Dolls With Resin

Mastering bubble removal ensures your resin doll creations look flawless and professional. For more tips on perfecting your castings, explore our full guide on how to make a resin doll.