How to Mix Resin and Hardener Slowly to Minimise Bubbles

← Back to how to make paintings with resin

Careful mixing of resin and hardener is a crucial step for achieving flawless, bubble-free resin paintings. Taking your time during preparation pays off with clearer, professional-looking results.

Why Mixing Slowly Reduces Bubbles

When you mix resin too vigorously, you introduce a burst of air into the blend, which forms small bubbles that can be tricky to remove. By slowly and steadily combining resin and hardener, you give trapped air less opportunity to get mixed in, resulting in a smoother, clearer finish once cured.

Stir gently but thoroughly, scraping the sides and bottom of your container as you go.
Give the mixture time to rest before pouring, allowing any minor bubbles to rise and pop naturally.

Practical Mixing Tips for Resin Art

Choose a wide, flat-bottomed mixing cup and use a flat wooden spatula or mixing stick. Stir in slow, deliberate circles for several minutes, ensuring the components combine fully according to your product’s recommended ratio—such as the user-friendly 3:2 ratio in the “Raphael Kit”. Periodically scraping the sides and bottom helps prevent streaks or unmixed areas, which could lead to tackiness or uneven curing.

When Bubble-Free Resin Mixing Matters Most

Minimising bubbles is especially important for artwork with transparent layers, delicate colour gradients, or detailed effects. In these projects, even a few stray bubbles can detract from the clarity and depth of your piece. Artists seeking glass-smooth finishes, such as for coasters or high-gloss panels, benefit most from a gentle mixing technique.

Related guides

How To Make Paintings With Resin

Mastering slow, careful mixing is a simple way to elevate your resin painting projects. Explore our range of quality resins and full kits to get the best results throughout your creative journey. For more tips and guides, visit our main how to make paintings with resin page.