Noticed that we don't torch resin in our general classes? We intentionally choose not to do that in cafe classes as it increases the temperature and releases vapour. But we do have a bunch of tips on how we remove bubbles without them with resin stable at room temperature!
1 . Warm It Up
If you have ever spotted cloudy resin you will know you are in a cold room, area or location. That cloudy look, after mixing, can often be attributed to microbubbles. If your resin starts cloudy, wrap your hand around the container instead of holding the rim, your body heat will accelerate the chemical reaction and in doing so bring the bubbles to the surface. Better yet warm the surface that you plan to pour the resin onto with a quick pass of a heat gun before pouring to help with bubble release.
2. Mix Slowly
You might hear our teachers issuing speeding fines in class, but all jokes aside mixing slowly is one of the best ways to ensure you don't end up with bubbles in your work to start with. Stirring slowly takes a bit longer, but it will leave you with fewer bubbles in your work.
3. Rest the resin then drag bubbles out or pop them
We use resin in class with bubble release properties. Resting the resin (or allowing it to sit and the bubbles to make their way to the surface) is a simple and effective way to remove any bubbles trapped in your resin. Once they make their way to the top, you can pop any that don't pop on their own. For shallow casts you can also use a toothpick to drag the bubbles to the surface.
4. Break the Tension
You can also do what you often see us do in class and use a straw to break the surface tension and release the bubbles. Other ways to break the surface tension is a quick spritz with isopropyl, partially filling the vessel with resin and rolling it about the base to release any bubbles trapped before continuing to fill it.
5. Dip it
If you plant to submerge something into a mould, dipping it in resin before placing it in the mould can assist in reducing the chance of capturing bubbles to begin with.
You can of course pass your resin with a BBQ lighter, heat gun, or butane torch but we highly recommend you read the SDS for the resin you choose to use (and employ additional PPE like ventilators) as a precaution due to the chance of increased vapour.