Bubbles can be the bane of any resin artist's existence. You spend hours carefully pouring and swirling your resin, only to find unsightly air bubbles ruining the finished product. So, how to get bubbles out of resin? In this article, we will list 9 effective methods to remove bubbles quickly, so read on for our […]
How to Get Bubbles Out of Resin? 9+ Effective Hacks Revealed
Bubbles can be the bane of any resin artist's existence. You spend hours carefully pouring and swirling your resin, only to find unsightly air bubbles ruining the finished product. So, how to get bubbles out of resin? In this article, we will list 9 effective methods to remove bubbles quickly, so read on for our top tips and techniques.
Why Do Resin Bubbles Occur?
Understanding the underlying causes of bubbles in resin is important for maintaining the quality of your completed products. So, what are the most common reasons?
Air entrapment is one of the reasons causing bubbles on the resin. There are a few factors that can contribute to air entrapment. One common mistake is stirring the resin too vigorously. While it's important to mix resin thoroughly, excessive stirring makes the air get incorporated into the liquid, creating tiny air pockets.
Another factor is using a contaminated mixing container. If the container has any residue or moisture, it can contaminate the resin and lead to bubble formation. Additionally, pouring the resin too quickly can also create air bubbles because the force of pouring creates turbulence and agitates the resin.
Temperature and Humidity
Rapid changes in temperature or high humidity levels in your workspace can lead to the formation of bubbles. Now we will analyze these two factors more clearly!
Temperature: When the temperature fluctuates quickly, the resin may expand or contract at different rates than the surrounding material, causing trapped air to be released and forming bubbles on the resin's surface. Higher temperatures can also increase the resin's viscosity, making it more difficult for trapped air to escape and leading to the formation of bubbles.
Humidity: High humidity levels in the workspace can affect the resin's ability to release trapped air because it contains more moisture. Then this moisture can react with the resin, causing the resin to become thicker or more viscous and trapping air bubbles in the process.
Resin bubbles occur when you use the wrong resin-to-hardener ratio or do not mix thoroughly. This means that the chemical reaction needed for the resin to cure properly is disrupted, leading to the release of gas bubbles within the mixture. So, how to mix resin and hardener correctly? Read our guide to explore the best ratio for your resin projects.
Dust or imperfections on the mold's surface can create air pockets as the resin is poured due to their ability to disrupt the smooth flow and adhesion of the liquid resin. When the resin encounters these particles or imperfections, it becomes trapped, preventing it from filling the mold and resulting in the formation of air pockets.
How you pour the resin into molds matters. Pouring too quickly or pouring too high can cause the resin to hit the surface quite hard, allowing air to get into the mixture. To minimize the formation of bubbles, it is recommended to pour the resin along the sides of the mold and let it flow to fill the bottom.
While pouring resin, you might encounter resin falling on your hands, and skin, and it can even get on your hair. In this case, you can use our effective methods to get resin off hands and skin safely and quickly, and take a look at our guide on how to get epoxy resin out of hair simply to ensure your health.
Overall, understanding the causes of bubbles in the resin can help you take preventive measures and know how to remove bubbles from epoxy resin by appropriate methods. This will ultimately allow you to create smoother and beautiful resin pieces.
9 Effective Ways to Get Bubbles Out of Resin
Are bubbles ruining the finish of your resin crafts? So, how to get bubbles out of resin? Discover these 9 effective ways to easily achieve professional-looking results every time.
Use a heat gun or lighter
Let's kick off this list of effective ways to get bubbles out of resin by starting with everyone's favorite tool - the trusty heat gun! So, how to get bubbles out of resin with this tool?
Step 1: Ensure that you have a properly mixed and poured resin surface before using the heat gun.
Step 2: Hold the heat gun 2 - 3 inches away from the epoxy surface for only 1 - 3 seconds and move it back and forth, covering the entire surface.
Step 3: Watch for air bubble blemishes by adjusting your perspective to a nearly parallel angle with the surface.
Step 4: After the first pass with the heat gun, wait for 10 minutes to allow any remaining air bubbles to rise to the surface.
Step 5: Repeat the process of using the heat gun 1 - 3 times, moving it back and forth over the surface, to eliminate any new air bubbles that have surfaced.
This informative video below helps you get a better understanding of how to effectively remove bubbles using a heat gun.
If you don't have a heat gun on hand, don't fret – a lighter can be a practical substitute to remove bubbles. How to get bubbles out of resin with a lighter?
Set your lighter to the lowest or medium flame setting to avoid overheating the resin.
Step 1: Hold the flame about half an inch away from the surface of the resin and move it across the bubbles without focusing on one spot for too long.
Step 2: Keep an eye on the resin as you pass the flame over it. If you notice smoke or popping sounds, it means the resin is too hot. Stop using the flame and allow the resin to cool for a moment before continuing.
Step 3: Repeat the heating process until the bubbles rise to the surface and disappear.
Step 4: Allow the resin to cool completely before handling or using it once the bubbles are removed.
*Notes: Avoid letting the flame touch the epoxy. This can cause the resin to melt or ignite, leading to damage or a potential fire hazard.
Overall, both methods should be carried out as soon as possible after the resin has been poured to ensure optimal results. The heat gun can be used for various sizes, from small jewelry pieces to larger art installations. On the other hand, a lighter is only suitable for removing bubbles on small projects because it has a limited reach.
Pop bubbles with a hair dryer
If you have a hair dryer at home, you will be surprised that it can be used to get rid of those pesky bubbles.
Step 1: Set the hair dryer to a low heat setting and hold it 2 - 3 inches away from the resin surface.
Step 2: Begin by gently blowing air into the edges of the resin and gradually move toward the center, focusing on the areas with bubbles.
Step 3: Use a sweeping motion to evenly distribute the heated air, taking care not to overheat or melt the resin.
Step 4: Continue blowing air until the bubbles rise to the surface and pop, ensuring a smooth resin finish.
*Note: Avoid using a hair dryer when the resin has already gotten sticky since it can cause the surface to become tight and wrinkled. If your surface project is sticky after curing, you can try some methods on how to fix sticky resin according to our expert instructions!
Although a hair dryer can remove bubbles when the resin has just been poured, it is considered a moderately effective device. Its strong wind might cause the resin surface to become uneven and impair solidification, whereas it may even lead to resin flow or splashing out of the mold for smaller pieces. So you should use a hair dryer to create wave patterns instead of removing air bubbles.
Use a torch
If you're tired of your resin projects looking like a bubbly mess. So, how to get bubbles out of resin? Just grab a torch and let's banish those bubbles for good!
Step 1: Begin by selecting a torch that is suitable for use with resin, such as a butane torch or a propane gun.
Step 2: Hold the torch or heat gun approximately 6 - 8 inches away from the resin surface. Move the flame in a sweeping motion across the surface, focusing on areas where bubbles are present.
Step 3: Apply heat to the resin surface for 1 - 4 seconds, allowing the heat to penetrate the bubbles. As the heat is applied, the bubbles will rise to the surface and burst, eliminating them from the resin.
Step 4: Continue applying heat to the entire resin surface, paying extra attention to areas where bubbles may be more stubborn.
A torch is essential for removing bubbles from uncured resin surfaces in large resin projects because it helps to distribute the heat quickly, allowing the bubbles to rise, escape, and get torched.
*Note: Don’t overheat the resin because this makes the resin melt or become discolored. Take breaks in between applying heat to allow the resin to cool down before continuing the process.
We demonstrate step-by-step instructions on how to get bubbles out of resin using a torch. Watching now!
Use rubbing alcohol
How to get bubbles out of resin with alcohol? Opt for a spray bottle with a fine mist setting instead of a concentrated stream. This way, you'll avoid any force that could penetrate the resin's surface and disrupt the curing process.
Step 1: Gently mist a light coat of rubbing alcohol over the areas where bubbles are present, giving it a chance to rest. Be cautious not to overspray, as a single light coating should be sufficient.
Step 2: If you have deeper bubbles within the resin, you can try using a toothpick or a small needle to gently pop them. Dip the toothpick or needle into the rubbing alcohol and carefully puncture the bubbles from the side.
Because it evaporates fast, rubbing alcohol is ideal for eliminating bubbles that appear on the surface of freshly poured resin and small resin projects. In larger or stubborn bubbles, alternative methods may need to be employed.
*Note: Remember not to use a lighter or flame after spraying the top of the resin's surface with alcohol because alcohol is flammable. This might cause a fire danger or burn or harm the resin.
Use a Straw
How to get rid of bubbles in resin without a torch or above tools? In this case, you can try a straw.
Use a straw and position it about 2 - 3 inches above the resin. Gently blow through the straw, and the carbon dioxide in your breath will pop those pesky bubbles without the need for a torch or any fire.
This is an interesting way for you to remove micro bubbles either in the mixed resin or from your freshly poured resin surface with your breath. However, this method can be time-consuming and labor-intensive to remove many bubbles on large projects, so it is only suitable for small projects.
*Note: It's important to remember that breathing in resin fumes can be harmful, so it's a good practice to turn your head and take a breath away from the resin when needed.
Use a toothpick or pin
Now we continue to show a hack to use a toothpick or pin to make the bubbles disappear.
Step 1: Gently insert the toothpick or pin into the center of the bubble, applying light pressure. Avoid using too much force, as this can potentially damage the resin or create new bubbles.
Step 2: Gradually move the toothpick or pin in a circular motion around the bubble, working from the inside out. This motion helps to break up the surface tension of the bubble and allows the trapped air to escape.
You only should use this technique when working with small art pieces and when the resin is still malleable. It is so time-consuming when working with larger resin projects with multiple bubbles.
*Note: Make sure the toothpick or pin is clean and free from any debris or residue that could potentially contaminate the resin.
Discover the simple trick to how to get bubbles out of resin mold with a toothpick or pin in our instructional video. Watch below to learn the technique!
Apply powder to reduce surface tension
To achieve flawless results when working with intricate resin molds, a helpful tip is to lightly dust the surface with baby powders or mica powders. This simple technique eliminates surface tension, ensuring that new air bubbles won't form during the molding process.
The approach should be used immediately after pouring resin into the mold for big resin projects. This efficiently removes surface tension, preventing the creation of new air bubbles.
Use a pressure pot
The next method we want to cover is the pressure pot which is an effective method to eliminate bubbles from resin projects:
Step 1: Make sure that the pressure pot is clean and free from any debris or residues
Step 2: Gently place the mold or casting inside the pressure pot, ensuring that it is properly positioned and centered
Step 3: Attach the lid tightly onto the pressure pot and secure it. Connect the air compressor to the pot and adjust the pressure to the recommended level specified by the resin manufacturer.
Step 4: Once the desired pressure is reached, keep the pressure on for the entire curing period
When it comes to large castings or using clear resin, such as polyurethanes, pressure potting is an excellent technique for eliminating bubbles from resin. It ensures optimal results by creating a bubble-free finish in the resin.
*Note: To avoid deformation, molds should be made under consistent pressure. We suggest maintaining the pressure pot at 60 psi, though higher pressures, closer to 100 psi, yield even better results.
Watch this instructional video below for step-by-step guidance to use a pressure pot properly!
Place the resin in hot water
To avoid the presence of trapped bubbles in the resin, it is important to prevent it from being cold. Instead, heating the resin significantly can help reduce the number of bubbles. Although direct heating of the resin is not recommended, you can achieve the desired results by placing the resin in hot water.
For this technique, you have two choices. Firstly, you can place the basket or tub containing the resin in a larger container filled with hot water. Alternatively, if arranging for a larger container is not feasible, you can place the resin in a plastic bag and submerge it in the hot water.
By subjecting the resin to a warm water bath and pouring it in thin layers, you can eliminate more than 90% of the trapped air bubbles.
*Note: Never put your resin in the microwave, double boiler, or boiling water. You should put the resin in just a 20-minute warm water bath.
Curious about the benefits of placing resin in hot water? Watch this informative video to discover the surprising reasons behind this technique.
Sand Out The Bubbles
To remove bubbles in cured resin, the best way is to sand them out. Here are the detailed steps demonstrating how to get bubbles out of resin in silicone mold quickly:
Step 1: Start by using coarse sandpaper, like 80 grit, to gently sand over the surface of the resin, particularly sanding in areas where bubbles appear. The goal of sanding is to generate teeth for the new resin layer to attach to.
Step 2: Once you have sanded the bubbles, wipe away any sanding residue with a clean cloth or paper towel.
Step 3: After removing the bubbles and cleaning the surface, pour a fresh batch of resin over the affected area. This will help to repair any areas that may have been damaged during the sanding process and ensure a bubble-free finish.
This method is suitable for removing bubbles on large cured resin projects because sanding the surface helps to break the surface tension. Besides, sanding also creates a smooth finish and easier to apply additional coatings or finishes, such as painting or varnishing for your project.
*Note: Sanding resin can create dust and fine particles that may be harmful if inhaled, so appropriate safety measures, such as wearing a mask and working in a well-ventilated area, should be taken.
Need tips on how to sand out bubbles? Watch this helpful guide below to learn the best techniques and achieve professional-looking results.
Simple Tips & Tricks to Avoid Bubbles In the First Place
Before you dive into pouring resin, it's always smart to take some precautions to minimize those pesky bubbles that can pop up. We have got some tricks up our sleeve to help you make your projects better.
Work in a clean, dust-free space
When working with resin, it is essential to work in a clean, dust-free environment since dust particles can readily become caught on the resin's surface, causing bubbles to develop. Maintaining a clean atmosphere reduces the likelihood of bubbles and ensures a professional-looking finish.
Monitor resin’s temperature
To ensure proper curing of resins and prevent bubbles from appearing on your resin projects in the best way, it is vital to maintain an ideal room temperature of 70 - 75 °F. However, constantly running heaters to achieve this temperature may not be convenient for everyone.
Instead, a practical solution is to heat a smaller area of your house, such as a closet or bathroom. Using a portable heater in these spaces can be sufficient to maintain the desired temperature for resin curing.
Another helpful option, especially for smaller resin craft projects involving molds or bezels, is to use a "Hot Box." This specialized container provides controlled heating for resin curing and ensures optimal results.
Choose the right resin type
DIY enthusiasts use different types of resin for their projects. However, there are the most popular two kinds of resin: epoxy art resin and casting resins. So, what are their differences?
Epoxy art resin is a popular choice for DIY enthusiasts due to its ability to create glossy and durable finishes. It is commonly used for art projects, jewelry making, and coating surfaces. However, it is a thicker resin than casting resin and is prone to forming bubbles due to its high viscosity and quick curing time.
On the other hand, casting resin is specifically designed for creating molds, models, and figurines. It is thinner and has a lower viscosity and longer curing time than epoxy art resin, which makes it less susceptible to forming bubbles. However, if not properly mixed or poured, they can still trap air and result in bubbles.
To avoid bubbles on the surface of the resin, it is important to mix the resin and hardener thoroughly. Accurately measure the amounts of resin and hardener according to the manufacturer's instructions.
Be careful and attentive when mixing, making sure to mix at the bottom and along the sides of the container. Stir the two components together slowly and consistently for the recommended duration. Rushing this step can introduce air and result in unwanted bubbles.
Warm the resin
To ensure bubble-free resin, place the bottles of resin and hardener in warm water for 10 - 20 minutes if they're cool. Remember that the working time for the resin mixture, which is the time you have to mix and pour it, will be reduced from 45 to 30 minutes. Due to the thermosetting nature of the resin, the increased temperature accelerates the curing process, starting it earlier than usual.
So, how long does resin take to cure? Each kind of resin will have its own cure time and working time. We have compiled the most common types, so you can refer to them to consider a reasonable working time after warming the resin!
Pour resin right
To achieve an even distribution of resin, pour your resin out slowly and pour it close to the center of the cast. Keep the spout about 2 - 4 inches away from the surface. To ensure thorough coverage, move the pouring cup in a smooth circular motion over the entire mold.
You should avoid pouring it directly over itself and instead pour it in different directions. This technique, whether in a clockwise or anti-clockwise direction, helps prevent the formation of air bubbles.
When it comes to pouring layers, thickness plays a vital role. If you pour a layer that is too thick, it can prevent bubbles from rising to the surface. Therefore, you should pour resin in thin layers, which allow the bubbles to escape, and then you can use one of the above methods to remove bubbles.
In conclusion, how to get bubbles out of resin? Understanding the reasons behind resin bubbles and implementing effective techniques to remove or prevent them is important for achieving a smooth and flawless resin surface. By using one of the 9 effective ways above, resin artists and craftsmen can ensure high-quality results in their projects.
How long does it take bubbles to come out of resin?
Once the resin and hardener are mixed and poured, it typically takes about two minutes for bubbles to start emerging. It's important to regularly check for any additional bubbles over the next 1 - 2 hours to ensure a smooth and bubble-free finish on your resin project.
Why remove bubbles from resin?
Bubbles can create imperfections and affect the overall appearance of the final product. Removing bubbles ensures a smooth and flawless finish, making the resin piece more professional-looking and aesthetically pleasing.
Can I fix bubbles after resin cure?
Yes, but it may take a bit of effort. One method involves drilling small holes near the bubbles and injecting resin to fill the gaps. Another option is to sand down the surface and apply another layer of resin over the affected areas.
Can I use a lighter to pop resin bubbles?
Yes, you can. Simply hold the flame a few inches above the surface and gently move it back and forth. The heat will cause the bubbles to pop, leaving you with a smooth and flawless finish.