HOW TO AVOID STICKY OR SOFT RESIN
1. The biggest culprit is usually off-ratio measuring, it’s important to measure the resin and hardener 1:1 ratio.
2. Stirring around and around, purposefully, as well as from side to side. Scrape the walls and the bottom of the cup a couple of times during mixing to release unmixed resin too. Then stir that through as well!
3. Epoxy Resin hates moisture, so working in very humid conditions or adding things to the epoxy resin that contain moisture will stop the resin from curing properly.
4. When you’re coloring epoxy resin with dyes and pigments, add no more than 10% of the total resin volume. The less you add, the better.
5. It’s best to stick with dyes and pigments that are designed specifically for resin, but some pigments or dyes that aren’t designed for resin will prevent the resin from curing properly.
5 SIMPLE WAYS TO ACHIEVE BUBBLE FREE
1. Stir slowly in one direction to avoid bubbles, which are very easy to produce if you stir too fast.
2. Put the mixed resin and hardener into hot water at about 60 degrees to accelerate the bubbles coming out.
3. Use the heating coaster (around 60 degrees) to accelerate the bubbles out, which is very convenient to operate.
4. Use a lighter or heat gun to heat the resin surface to eliminate air bubbles.
5. If you're using silicone molds you can warm the mold in the oven before pouring the resin in it. Take the mold out of the oven, let it air for a few seconds, and then pour the resin in. The warmth of the mold will get rid of the bubbles in the resin.