Mixing 3D Resins: Which Combinations Work | 2026 Guide

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

Ever thought about playing alchemist in your workshop? Mixing resins isn't as crazy as it sounds — it's actually one of the most powerful techniques you can master. In my experience, it's like becoming the chef of your own print shop, creating custom materials you won't find on any store shelf.

In this guide, I'll walk you through how to create your own 'super-resins' safely and without the headaches. If you want to brush up on the basics first, check out my article on what 3D resins are.

Why should I mix 3D resins?

Mixing resins lets you achieve properties that standard resins simply can't offer — like improved impact resistance or a controlled flex point — while saving money and expanding your creative options without having to buy multiple specialist resins.

Think about that wargaming miniature that snaps if you look at it wrong. Now imagine adding a small percentage of flexible resin and turning it into a piece that can survive a drop from the gaming table. I've tested this countless times — trust me, it's a total game changer.

This isn't just about experimenting for the sake of it. It's about unlocking a whole new level of customisation and getting performance out of your prints that you never thought possible.

What are the basic principles behind mixing resins?

For a resin blend to work, the chemical components need to be compatible — especially the photoinitiators, which react to UV light. Most hobbyist resins use the same wavelength (405nm), which makes compatibility much more straightforward.

Every UV resin is essentially a very precise cocktail. Inside you've got monomers and oligomers (the base — think of it like flour in a cake), photoinitiators (the yeast that reacts to UV light and makes everything cure and harden), pigments for colour, and additives that give it its special properties.

The key to a successful blend is making sure all these ingredients play nicely together. The most critical factor is wavelength. Fortunately, almost all hobbyist resin 3D printers use a wavelength of 405nm, so you're usually covered on that front. The real test is whether the chemical bases are compatible — you don't want an oil-and-water situation.

My golden rule when starting out: 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 trial and error. To get a better understanding of what you're working with, check out my guide on the different types of 3D printer resins.

A bad combination can be a disaster: resin that won't cure, layer separation, or prints that shatter on impact. Always do a small test in a silicone cup before pouring your magic mixture into the vat. Better safe than sorry. 😉

Which resin combinations work — and which should you avoid?

The safest and most effective combinations are generally mixing resins of the same brand and type, such as standard with flexible or standard with ABS-like. Avoid mixing resins with different cleaning technologies (water-washable vs. IPA-based) or very different formulations.

Combinations I've tested and recommend

If you want to play it safe, my advice is to stick to resins from the same family, like the range of Anycubic resins. Their formulations are closely related, which minimises the risk of anything going wrong.

For example, Anycubic Standard V2 makes a fantastic base. Try adding 10–20% flexible resin to it. You'll be surprised how much tougher your prints become.

• Standard + Flexible: Ideal for improving the durability of miniatures.
• Standard + ABS-Like/Tough: Perfect for functional prototypes and mechanical parts.
• Same colour, different brand: Usually works, but always do a cure test first.
• Clear + opaque colour: A great way to create custom translucent colours.

Mixes to avoid

On the other hand, some combinations are a recipe for disaster. Mixing resins with different technologies — like a water-washable resin with a standard IPA-based one — is a gamble you don't want to take.

Their wash additives can clash, leading to partial cures and unpredictable properties. The same goes for mixing hobby resins with highly specialised ones, such as dental or high-temperature resins. Just don't do it!

How do I mix standard and flexible resin for stronger prints?

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

If you're fed up with your miniatures snapping at the slightest touch, this trick is going to be a game changer. It's without doubt one of the most popular and effective mixes out there.

Ratios and the art of mixing

Precision is your best friend here. To start, I recommend an 80% standard resin to 20% flexible resin ratio. This already gives you significantly improved durability with very little loss of detail.

Need something tougher — say, for a mechanical component? Push it further. Try a 70/30 or even 60/40 mix for seriously impact-resistant results. To nail your ratios, use a precision scale (0.01 g accuracy). Pour into a clean container and stir thoroughly for at least 5 minutes, until the colour is completely uniform.

One quick note worth mentioning: flexible resins tend to cure a bit more slowly. As a starting point, you'll need to increase your exposure times by 10% to 20%. If you'd like to learn more, I cover everything in my article on flexible resin uses and applications.

Recommended Mixing Ratios Table (Standard + Flexible)

Here's a table I use as an initial guide. Remember, this is just a starting point — don't be afraid 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 lets you fine-tune the stiffness, impact resistance, and flexibility of your prints for engineering-grade projects.

This is where things get serious — and seriously fun. If you want your prints to go from simple display pieces to fully functional components, blending resins is the way to do it. Think of it as engineering your own custom material from scratch.

Consider combining a rigid resin with a Tough resin. Suddenly, you have precise control over the elastic modulus and impact resistance of your prints. This is invaluable when prototyping, building drone enclosures, or printing any part that will be exposed to mechanical stress.

The key to success is being methodical: every gram of each resin in your blend needs to be weighed accurately, mixed thoroughly, and — most importantly — tested. Printing a few calibration cubes is a step you simply cannot skip.

The team at Prusa3D, for example, has documented their own experiments. They found that a blend of their Prusament Model and Flex80 resins at a 35%–65% ratio achieves a yield strength of 45 MPa after 60 minutes of post-curing. If you want to dive into their full analysis, you can read more about how they dial in specific material properties on their blog.

If this topic interests you, I highly recommend checking out my complete comparison of tough resins for functional parts.

What Testing Protocol Should I Follow to Validate My Resin Blends?

To safely and effectively validate your resin blends, always follow a structured testing protocol. This means working safely, measuring your ratios precisely, running small calibration prints to dial in your exposure settings, and finally stress-testing the mechanical properties of your cured parts.

Jumping into mixing resins without a plan is the fastest way to waste time and materials — trust me, I've learned that the hard way. To get reliable results from your custom formula, you need a solid method. I always follow this 5-step protocol — it's my safety net every single time.

My 5-Step Resin Validation Protocol

1. Safety first (always!): Before anything else, put on your nitrile gloves and safety glasses. Work in a well-ventilated area. This isn't optional — it's non-negotiable.
2. Mix with precision: Use a scale accurate to at least 0.1g. Pour your resins into a clean container and mix thoroughly for 5–10 minutes. An uneven mix is a guaranteed recipe for failure.
3. Run a test print: Use just a small amount of your blend to print a calibration model — something like the popular 'AmeraLabs Town'. This lets you dial in your exposure settings without burning through material. Not sure where to start? Use my 3D resin settings calculator.
4. Inspect the results closely: Take a good look at the print. Did it cure all the way through? Are there any soft or tacky spots? Are the details sharp and clean? Be your own toughest critic here.
5. Stress test it: Print a functional test piece. Now for the fun part — flex it, drop it (gently, though! 😜), and see if it has the strength and flexibility you were going for.

Only once your mix passes all five of these tests should you consider it "print-ready." This method will save you a ton of time, resin, and headaches down the line.

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 resins). That said, I always recommend running a small compatibility test first.

How do I know if two resins are compatible?

The safest approach is to mix a small amount in a silicone cup and cure it with a UV flashlight. If it cures evenly and doesn't separate, that's a good sign they'll work well together.

Does mixing resins affect my FEP film's lifespan?

Not directly — as long as the blend cures properly and doesn't leave any tacky or partially cured residue in the vat. A failed mix that bonds aggressively to the FEP can definitely cause damage when you try to remove it.

Does mixing resins change the final color?

Absolutely. Blending resins is actually a great way to create custom colors, much like mixing paints. Just keep in mind that adding an opaque resin to a clear one will reduce its transparency.

Conclusion: Time to Start Mixing!

As we've covered, mixing resins isn't some dark art — it's actually a powerful way to become your own 3D printing alchemist. It opens the door to getting extra toughness in your miniatures or creating prototypes with exactly the mechanical properties you need.

The main takeaway here? Don't be afraid to experiment. Just do it smart, and do it safely. Start simple — like blending a standard resin with a touch of flexible — and always write down your results as you go.

From there, the only limit is your curiosity. Who knows — you might just discover the perfect settings for that part that kept failing. Enjoy the journey and the discoveries along the way!