Mixing 3D Resins: Which Combinations Work | Guide 2026

Yes, you can mix different 3D resins to create new materials with custom properties, such as greater flexibility or strength, as long as they are chemically compatible and you use the right ratio. It's an advanced technique but very useful for makers.

Have you ever thought about playing alchemist with your resins for 3D printers? Well, let me tell you that mixing resins isn't crazy at all — it's actually one of the most powerful techniques you can master. In my experience, it's like becoming the chef of your own workshop, creating custom materials you won't find in any store.

In this guide, I'm going to walk you through everything you need to know to create your own 'super-resins' safely and without any drama. If you want to brush up on the basics before we get started, take a look at my article on what 3D resins are.

Why should I mix 3D resins?

Mixing resins lets you achieve properties that a standard resin doesn't offer, such as greater impact resistance or a controlled flexibility point, saving costs and expanding your creative possibilities without needing to buy multiple specialised resins.

Think about that wargame miniature that breaks just by looking at it. Now imagine that by adding a small percentage of a flexible resin, you transform it into a piece capable of surviving a fall from the gaming table. I've tested this many times and, I promise you, it changes the game entirely.

This isn't just about experimenting for the sake of it. It's about unlocking a whole new level of customisation and getting your prints to perform in ways you never imagined.

What basic principles govern resin mixing?

For a resin mix to work, its chemical components must be compatible, especially the photoinitiators (which react to UV light). Most resins for makers use the same wavelength (405nm), making compatibility easier to achieve.

Every UV resin is, at its core, a very precise cocktail. Inside you have monomers and oligomers (the base, like the flour in a cake), photoinitiators (the yeast that reacts to UV light to make everything set and solidify), pigments that give it colour, and additives that give it superpowers.

The trick to making the mix work lies in all these ingredients getting along with each other. The most critical factor is the wavelength. Fortunately, almost all hobby resin 3D printers use a wavelength of 405nm, so you're usually covered on that front. The real test is whether their chemical bases don't repel each other, like oil and water.

My golden rule for getting started: always try to mix resins from the same manufacturer. For example, I've found that Anycubic resins tend to be formulated to work well together, which will save you a lot of headaches. To better understand what you're working with, I recommend my guide on the different types of resins for 3D printers.

A bad combination can be a disaster: the resin doesn't cure, it separates into layers, or the piece shatters. Always do a small test in a silicone cup before pouring your magic potion into the tank. Better safe than sorry. 😉

Which resin combinations work and which should I avoid?

The safest and most effective combinations are usually mixing resins of the same brand and type, such as standard with flexible or standard with ABS-like. You should avoid mixing resins with different cleaning technologies (water vs. alcohol) or very different formulations.

Combinations I've tested and recommend

If you want to play it safe, my advice is to mix resins from the same family, such as Anycubic resins. Their formulations are usually close cousins, which minimizes the risk of something going wrong.

For example, the Anycubic Standard V2 is a fantastic base. Try adding 10-20% of a flexible resin to it. You'll be surprised to see how the strength of your pieces skyrockets.

• Standard + Flexible: Ideal for increasing the durability of miniatures.
• Standard + ABS-Like/Tough: Perfect for creating functional prototypes and mechanical parts.
• Same color, different brand: Generally works, but always do a curing test first.
• Transparent + opaque color: A great way to create custom translucent colors.

Mixes best avoided

On the other hand, there are combinations that are an invitation to disaster. Mixing resins from different technologies, such as a water-washable resin with a standard resin (which needs alcohol), is playing Russian roulette.

Their washing additives can clash, causing partial curing and unpredictable properties. The same happens if you try to mix hobby resins with highly specialized resins, such as dental or high-temperature ones. Don't even try it!

How do I mix standard resin with flexible resin to get stronger parts?

To make your parts stronger, add a small percentage of flexible resin to your standard resin. An 80/20 ratio (standard/flexible) is an excellent starting point for miniatures, increasing durability without sacrificing much detail.

If you're fed up with your miniatures snapping just from looking at them, this trick is going to change your life. It is, without a doubt, one of the most popular and effective mixes out there.

Ratios and the art of mixing

Here, precision is your best friend. To start, my recommendation is a ratio of 80% standard resin and 20% flexible resin. This alone gives you incredible durability while barely sacrificing any detail.

Need more toughness, like for a mechanical component? Raise the stakes. Try a 70/30 or even 60/40 mix for bombproof strength. To nail the ratios, I use a precision scale (0.01 g). Pour into a clean container and shake vigorously for at least 5 minutes, until the color is uniform.

That said, a small note: flexible resins are a bit lazier when it comes to curing. As a starting point, you'll need to increase your exposure times by between 10% and 20%. If you want to know more, I cover everything in my article about the uses of flexible resin.

Recommended ratio table (Standard + Flexible)

Here's a table I use as an initial guide. Remember that this is a starting point, so don't hesitate to experiment!

How do I create blends with advanced mechanical properties?

To create parts with advanced mechanical properties, you can mix 'Tough' or 'ABS-Like' resins with standard resins. This technique allows you to precisely adjust the rigidity, impact resistance, and flexibility of your prints for engineering projects.

This is where things get serious and fun. If you want your parts to go from simple figures to functional components, mixing resins is the key. It's like designing a custom material.

Think about combining a rigid resin with a tough one ('Tough'). Suddenly, you can control the elastic modulus and impact resistance. This is pure gold if you're creating prototypes, drone casings, or any part that's going to experience mechanical stress.

The secret to success is being rigorous: every drop of the blend must be weighed precisely, stirred thoroughly, and most importantly, tested! Printing a few calibration cubes is a step you simply cannot skip.

The Prusa3D team, for example, has documented their experiments. They found that a blend of their Prusament Model and Flex80 resins at a 35%-65% ratio achieves an elastic limit of 45 MPa after 60 minutes of post-processing curing. If you want to take a look at their analysis, you can read more about how they achieve specific properties on their blog.

If this topic appeals to you, I recommend taking a look at my full comparison of strong resins for functional parts.

What testing protocol should I follow to validate my blends?

To validate your resin blends safely and effectively, always follow a testing protocol. This involves working safely, measuring proportions precisely, running small calibration prints to adjust the exposure, and finally, testing the mechanical properties of the cured part.

Jumping into mixing resins randomly is the fast track to failure. Trust me, I'm speaking from experience. For your new magic formula to be reliable, you need a method. I always follow a 5-step protocol that serves as my safety net.

My 5-step validation protocol

1. Safety first (always!): Before anything else, put on your nitrile gloves and safety goggles. Work in a well-ventilated area. This is not a suggestion — it's a golden rule.
2. Mix with surgical precision: Get a scale that measures to at least 0.1g accuracy. Pour the resins into a clean container and stir vigorously for 5-10 minutes. A non-homogeneous mix is a guaranteed recipe for failure.
3. Test print: Use just a small amount of your mix to print a small calibration model, like the famous 'AmeraLabs Town'. This lets you nail down the exposure times without wasting material. If you're not sure where to start, use my 3D resin settings calculator.
4. Close-up evaluation: Examine the result. Has the piece fully cured? Do you notice any soft or sticky spots? Are the details sharp? Be very critical here.
5. Torture test: Print a functional test piece. Now comes the fun part: bend it, drop it (gently, though, come on! 😜) and check whether it has the strength and flexibility you were looking for.

Only once your mix has passed all five tests with flying colors can you consider it "print-ready." This method will save you a ton of time, resin, and headaches.

Frequently asked questions (FAQ) about mixing 3D resins

Can I mix resins from different brands?

Yes, in most cases you can mix resins from different brands as long as they use the same technology (e.g. both are standard 405nm). However, I always recommend doing a small compatibility test first.

How do I know if two resins are compatible?

The safest way is to mix a small amount in a silicone cup and cure it with a UV flashlight. If it solidifies evenly and doesn't separate, that's a good sign they are compatible.

Does mixing resins affect the lifespan of my FEP?

Not directly, as long as the mix cures correctly and doesn't leave sticky or half-cured residue in the tank. A failed mix that adheres strongly can damage the FEP when you try to remove it.

Does mixing resins affect the final color?

Yes, absolutely. Mixing resins is an excellent technique for creating custom colors, just like mixing paints. Keep in mind that adding opaque resin to a transparent one will reduce its clarity.

Conclusion: Time to start mixing!

As we've seen, mixing resins is no dark art — it's a way to become an alchemist of 3D printing. It's the gateway to getting that extra strength in your miniatures or to manufacturing prototypes with the exact properties you need.

Ultimately, what I want you to take away from all of this is that there's no need to be afraid of the bottle. Experiment! But do it thoughtfully and, above all, safely. Start with something simple, like a standard resin mix with a touch of flexible, and always write down your results.

From there, the only limit is your curiosity. Who knows, maybe you'll discover the perfect formula for that part that always broke. Enjoy the journey and the discoveries!