Achieving a bubble-free epoxy resin mixture has as much to do with the mixing method used as it does the brand of epoxy resin used. It is important to use a brand that is formulated to release bubbles quickly, but you can help keep the bubbles to a minimum if you follow the tips below. Here are the best tips on how to mix bubble-free epoxy resin for your next resin art project!
No matter the brand of epoxy resin you choose, you need to follow the directions on the bottle. Most epoxy resins require a 1:1 ratio of epoxy resin and hardener. However, there are a few brands where this differs. Another mixing ratio you may see is 3:1, epoxy resin to hardener. Just make sure you are cognizant of what the specific directions say for the specific type of epoxy resin you are using.
You may encounter varying directions with regard to measurements. Most epoxy resin brands instruct you to measure by volume. However, others call for measurements by weight. If the directions call for measurements by volume, you can use a plastic or silicone measuring cup. On the other hand, if the directions instruct measuring the components by weight, you need to purchase a scale to do so. Here is an affordable one that I recommend:
I suggest you buy a cheap silicone measuring cup, like this one listed on Amazon:
(It even comes with silicone stir sticks, which you will use, and little finger condoms, which you probably will not, but who does not love a freebie?)
When mixing, be sure to mix thoroughly. You will know the product is mixed when you stop seeing strings of resin in the cup. Also, be sure to scrape the sides and the bottom of the cup to ensure thorough mixing. If you do not do this, you may end up with sticky parts on your project.
Another great tip is to mix slowly. Mixing slow helps prevent air bubbles in your epoxy resin.
If you have issues with air bubbles, you may also want to switch up your stir stick. A wooden stir stick, being porous, may also introduce extra air bubbles into the epoxy resin while mixing. Using a silicone stir stick will prevent this problem.