Why Your Resin Still Has Bubbles (And the 3-Step Fix Most Tutorials Skip)
If you've poured resin more than twice, you've dealt with bubbles. They show up in the final cure like tiny ghosts ruining an otherwise perfect piece.
Most tutorials tell you to "just use a heat gun." That's a band-aid, not a fix.
The Real Problem
Bubbles come from three sources, and you need to address all three:
1. Chemical reaction bubbles — When you mix Part A and Part B, the exothermic reaction produces gas. The faster you stir, the more air you whip in. Most beginners stir resin like they're making scrambled eggs. Stop.
2. Trapped air from pouring — Pouring from height or pouring too fast creates folds in the resin that trap air pockets. Think of it like folding batter — every fold is a potential bubble.
3. Surface tension bubbles — These rise from your mold surface, inclusions, or bezels. Any porous material will off-gas into your resin as it cures.
The 3-Step Fix
Step 1: Slow fold mixing (2+ minutes)
Stir slowly in a figure-8 pattern, scraping the sides and bottom. You're folding, not whipping. Set a timer — most people undermix because they get impatient. Undermixed resin = soft spots AND bubbles.
Step 2: Rest period
After mixing, let your resin sit for 2–5 minutes before pouring. This lets the majority of micro-bubbles rise to the surface naturally. This single step eliminates 60–70% of visible bubbles.
Step 3: Controlled pour
Pour from as close to the mold as possible, in a thin stream. Think honey drizzling off a spoon, not water from a pitcher. The thin stream breaks surface tension and lets remaining air escape during the pour itself.
The Advanced Method
For truly flawless pieces — the kind you can sell at premium prices — you need a pressure pot. Curing under 40–60 PSI compresses any remaining micro-bubbles to invisible size. This is what separates hobby pieces from professional jewelry.
I break down the complete pressure pot technique, bezel finishing methods, and portfolio-building strategies inside my course at ResinCraft Academy. But the three steps above will immediately improve your next pour.
Try it on your next piece and see the difference.