If you’re new to resin, it’s easy to make mistakes. You can waste a lot of time and money in your early days. This is especially true if you have no one to show you the way or help with troubleshooting.
Due to this, our goal at Resin Obsession is simple: be the very best resin resource we can be. We want to make resining simple, fun, and easy for you!
Why does my resin turn yellow?
As resin dries, it slowly starts to develop yellowing over time. This happens because of the way that resin is made and it’s not a bad thing; in fact, yellowing resin is actually more aesthetic and appealing.
However, sometimes this process goes too far and builds up in the joint until it turns brown or even yellow. This usually happens with resin that’s been cured for some time before being used.
The best way to minimize the development of this problem is to allow your piece to cure for longer than recommended before applying a finish, especially if it’s exposed to light at any point during its development.
The longer you wait, the less likely you are actually going to end up with an ugly-looking piece of wood instead of a lovely one.
Is resin still good if it turns yellow?
It became clear that a lot of people faced this problem. The key to keeping resin clear and maintaining its lustrous color is to keep it out of direct sunlight and make sure it doesn’t have any water exposure.
Placing a sheet over the outside of your container will also prevent any rainwater from getting in, so you won’t be exposed to moisture that can cause discoloration.
If you’re not up for doing all of this yourself, there are options like spray-on sunblock or UV filtering spray that you can use on your resin to keep it free from yellowing.
How do you keep resin clear?
If you are new to resin, always work in a clean environment. If you forget this important step, chances are good that your resin will be yellow.
There are several factors that can cause changes in the color of your resin project. Let’s discuss them all one by one:
- Use the right type of resin and follow the proper mixing ratio. Use only high-quality epoxy resin! Please make sure to read carefully about how to mix the resin so that it cures clear! You can find details here: How to mix epoxy properly.
- Add UV protection – if you work with ArtResin® or other water-clear epoxies, you might consider adding UV protection when working with light colors or colors that tend to yellow more easily (reds and pinks for example). This way, you won’t have to worry about your piece yellowing over time from exposure to sunlight! The best way is to add 2ml of ArtResin®’s ClearShield Protective Topcoat per 4oz bottle (= 40ml) of ArtResin® used for coating. Be sure not to use too much ClearShield as this could affect curing time and/or lead to yellowing as well! Always add UV protection at the end of your mixing process when working with clear epoxy resins like ArtResin® (after having added any pigments/colorants etc.) – adding UV protection earlier on during mixing may lead it clumping up into tiny balls which will then show up as small specks in your final piece (and nobody wants those!).
- Keep everything cool and avoid heat exposure! If possible, keep all components in an air-conditioned environment until use, and don’t leave them out between steps (mixing, pouring, etc.). Avoid leaving them anywhere near direct
How do you fix yellow epoxy?
Yellowing of your epoxy resin is caused by exposure to ultraviolet rays or UV. If you notice your resin turns yellow over time, you have two options to help prevent this from happening:
- Use a resin that is specifically formulated to be clear and has built-in protection from UV rays. This will help prevent discoloration once it cures in the sun or under lighting.
- Keep your resin away from sunlight when working with it and while it cures by using a UV box or storing it inside.*
What resin does not turn yellow?
In my opinion, UV resin is the best way to go (if you don’t mind spending a bit more money) because it will not turn yellow over time.
That being said, if you absolutely cannot spend the extra money on UV resin, there are other ways to protect your resin piece from turning yellow.
Does UV resin go yellow?
You may be wondering, “Does UV resin go yellow?” The answer is yes. Unfortunately, any clear resin will turn some shade of yellow over time.
When mixed and poured into a mold, most types of resin are crystal clear color. Some types of resin are known to yellow less than others. Additionally, there are resins that are more sensitive to light than others.
Which is better UV resin or epoxy resin?
UV resin is great for small projects and jewelry because it cures faster. UV resin is most often in a small bottle, which is better for smaller crafts. You’ll want to use a tiny brush or toothpick to apply the resin when you’re pouring it into smaller spaces.
Epoxy resin, on the other hand, is better for larger projects and areas. Epoxy resin comes in larger bottles, so you’ll be able to purchase enough of it to work on bigger projects.
Epoxy has a longer working time than UV resin as well (45 min vs 30 min), so that gives you more time to work before the epoxy starts setting up hard and fast.
You can also use epoxy resin to make your own stickers! If you plan on covering an area with an epoxy sticker (like a design in your tumbler), then epoxy works great for that!
How do you keep resin shiny?
If you want to do clear resin casting, then you need to start by using the right resin. Most general purpose epoxy resins will yellow over time, so you really need to use a specialized casting resin designed for that purpose.
There are several types of casting resins that do not yellow:
- Casting resins with UV inhibitors. You can use a polyester or polyurethane casting resin that has been specially formulated with UV absorbers and stabilizers to resist UV light from turning it yellow. This type of resin is best used for clear casting in relatively thin sections (2cm max). It typically comes in two parts, which you mix together and pour into your mold. Once it cures (usually 24 hours), the result should be a clear cast with no yellowing.
- Resin is specifically designed for clear casting. This is different from a general purpose polyurethane casting resin because it’s been formulated not only to resist UV light but also to stay crystal clear even if poured in thick sections (up to 20cm thick). It’s often sold as jewelry grade epoxy, hobby grade epoxy, or low viscosity epoxy resin.
In conclusion, it’s important to remember that not all resin is created equal. For example, UV resin does not turn yellow the way epoxy does and can be kept clear by storing it in a dark place.
And for the best results, keep your UV resin shiny by storing it in a dark, cool place but know that it can be expensive and very brittle.