Complete Guide: How to Choose the Right Filament for Your 3D Printer 🎯
When you dive into the world of 3D printing, one of the first important decisions you have to make is choosing the right filament for your projects. It's no easy task: there are so many types of filaments and each one has its own trick! 😅 So, if you don't want to end up with a warped, broken, or terribly finished project like the spaghetti below 😝, keep reading. We explain what you need to know about the main filaments and how to choose the right one for your project.

¡If you also want a spaghetti trophy, you can download it here!
Also, remember that at Mr Resin we offer 50g samples of various filaments so you can try them before committing to a full spool. Trying is free… or almost! 😜
PLA: The classic that never fails 🏆

PLA (Polylactic Acid) is like the hero of filaments. It's easy to use, environmentally friendly (it's made from materials like corn), and prints at lower temperatures than other filaments. It's perfect for beginners and simple projects, such as prototypes or decorative figures.
Advantages:
- Biodegradable and eco-friendly 🌱
- Easy to use, you don't need an ultra sophisticated 3D printer
- Barely any warping (= no last-minute surprises!)
Disadvantages:
- Not very heat resistant (forget about leaving your PLA in the sun)
- Somewhat brittle for projects that require strength
PLA+: The upgraded version of PLA 💪

If you like PLA but feel it's missing a little spark, PLA+ is for you! It's an upgraded version that is more resistant and has greater durability. Ideal for projects that need a bit more strength, but without the complications of other more technical filaments like ABS.
Advantages:
- Stronger than traditional PLA
- Ideal for functional parts that need strength without sacrificing ease of printing
Disadvantages:
- Still retains some of PLA's weaknesses, such as low heat resistance
PETG: The perfect blend of flexibility and strength 🛠️
PETG combines the best of both worlds: flexibility and strength. If you're looking for a filament that can withstand impacts and won't deform easily, but is still easy to print, this is the one for you. It's also water-resistant, making it perfect for functional parts such as utensils, casings, or even outdoor pieces.
Advantages:
- Impact-resistant and flexible
- Water-resistant, ideal for outdoor use
- Does not emit as many fumes as ABS
Disadvantages:
- Slightly more difficult to print than PLA
- Requires more care with the 3D printer settings
ASA: The filament that fears no sun ☀️

Do you have a project that needs to withstand the elements? Then ASA is the perfect filament. It's resistant to UV rays and water, making it ideal for parts that will be used outdoors. Car parts, tools, and outdoor decorations are the most common uses for this material.
Advantages:
- Weather-resistant and UV-resistant
- Ideal for outdoor projects
Disadvantages:
- Slightly more difficult to print than PLA and PETG
- Can emit fumes during printing (use adequate ventilation)
Silk: Print in style 🌟

Looking for a smooth, glossy finish? Silk filament is your best friend. With its silky texture and spectacular shine, this filament is perfect for prints that need an aesthetic touch, such as decorations or artistic figures.
Advantages:
- Glossy and smooth finish
- Ideal for decorative and aesthetic projects
- Perfect if you want to add a nice touch without having to paint.
Disadvantages:
- It is not the strongest filament nor the most heat-resistant
High Speed: Less time, more prints ⚡

High Speed filament is ideal for when time is of the essence. Specifically designed for fast printing, this filament maintains excellent quality without sacrificing precision. Perfect for those who need to print large batches in the shortest time possible.
Advantages:
- Fast printing without losing quality
- Ideal for projects with tight deadlines
Disadvantages:
- May require specific adjustments in the 3D printer settings
Comparison: "High Speed is like the coffee of filaments: when you're in a hurry, it saves the day."
Other exotic filaments 🧩
In addition to the most popular ones, there are filaments with unique characteristics such as flexible, wood or metal. Each one has very specific applications, such as creating objects that simulate different textures or behaviors. These filaments are more complicated to work with, but they can add a very special touch to your projects.
Examples:
- Flexible filament: ideal for creating moving or elastic parts
- Wood filament: perfect for projects with a rustic look
Which one to choose? It depends on your project 🤔
At the end of the day, choosing the right filament depends on what you want to do. If you're printing a simple prototype, PLA will be enough. If you need something stronger for a functional project, consider PETG or PLA+. And if your part is going to be exposed to the sun? Then ASA is your filament.

Remember that at Mr Resin we offer 50g samples of all these filaments so you can try them before committing to a full spool. No excuses! 😜 In the end, choosing a filament is like choosing a pizza: there are many options, but they're all good if you choose well!
Conclusion 🎯
Choosing the right filament may seem complicated, but with a little knowledge, you're sure to make the best decision. Whether it's PLA, PLA+, PETG, ASA, Silk or any other, each one has its advantages and disadvantages. The most important thing is knowing what you need for your project.
Don't forget to try our samples and find the perfect filament for you!