Overture PLA has been around for a long while, but it used to be called AmazonBasics. Since it broke away from that, the brand has gone from strength to strength, cementing itself as one of the best in the business. I especially like the consistency of the color across batches, something that's important when you're using multiple rolls on one project.

The dimensional accuracy is excellent with each of Overture's materials -- the company sells PETG, ABS and a host of others too -- and when you combine that, the seemingly infinite variety of colors with the consistently low price, Overture cements itself as the best overall PLA you can buy.

Pros

• Gorgeous color shifts
• Hides layer lines well

The color of this PLA is hard to describe, but it is beautiful. It has a purple-blue-green hue and looks like metal that's been heated up. Right now, it's probably my favorite-looking filament.

It's also easy to print with, and because of the shifting colors, it hides layer lines well. If you're looking for a dark filament that you aren't painting over, I'd pick up a few rolls of this today.

The bigger your 3D printer gets, the more you need one continuous roll of filament to make parts. Sure, you can trust the filament runout sensor on your machine and hope that multiple rolls of filament look the same color, but often the machines fail or the color changes. Overture is helping to solve that issue with large rolls of filament. The company has several of its most popular colors available in 2- and 3-kilogram rolls so you can stock up and always be ready for those huge, ambitious projects.

I really enjoy the color of this PLA from Inland. It prints very well and the shimmer from the gold/red highlights hides any layer lines after it has printed. Beautiful colored filament always makes me happy, and this is one of my favorites.

With the advent of ultra-fast 3D printers, companies including Elegoo have started to create materials that work better at high speeds. Rapid PLA Plus works extremely well at high speeds due to its high fluidity when melted. It printed very well on several of my fastest machines and sands very well if you are looking to finish your prints with paint. 

Ataraxia Art already makes excellent PLA and flexible PLA, but its new range of tri-color filament is some of its best yet. Tri-color uses three colored filaments along its width to create a beautiful shimmering effect as you move the model, so it's perfect for projects you aren't going to be painting.

This PLA comes in four different color combinations and is one of my favorite filaments to use.

For projects you can show off without paint, PolyTerra might be for you. The colors are vivid, and because they are matte, you don't lose details in the reflections like with shiny filament.

PolyTerra also comes in recycled cardboard reels, and the creator, Polymaker, will plant a tree in the area where the roll was bought to help offset the cardboard used. This filament is still plastic, but it helps my conscience to use this one.

In an article about this flexible PLA, I explained how, although this isn't technically PLA, it does print much easier than TPU, a more common flexible filament. I used it to print an amazing Mandalorian Blacksmith helmet for my 4-year-old. She can't break it because it's so bouncy.

This isn't for newbies, though. It took a lot of trial and error to get the setting for my 3D printer right, and because it is so soft, the accuracy can be pretty wonky. But for something that's different from normal PLA, it's worth checking out. 

I've been meaning to buy some of this beautiful filament for some time now, and I'm really happy I did. The color is almost exactly the same as mint chocolate chip ice cream, and the tiny flecks of marble color enhance the look even more. It prints great, with a nice glossy finish and I found printing it at a higher temperature brings out that gloss really well. 

Aside from the print quality, I love the way it makes me feel. The color just makes me happy and reminds me of days at the beach with my kids. It's gorgeous.

Inland makes good filament across the board, and its ABS is no different. I've never had issues with the dimensions, and the final product has consistent layer lines. Sanding Inland ABS is a joy as the material can be wet-sanded to a smooth finish.

Pros

• Vibrant colors
• Excellent diameter accuracy

Fillamentum is one of my favorite ABS makers. The colors are always so vibrant, and while it costs a little more than the competition, it keeps that vibrancy even after the model is finished printing. If you're looking for ABS that you don't need to paint, Fillamentum is a great place to start.

Pros

• Great bulk buy
• Cheap
• Reliable

Overture PETG is a favorite because it comes in an economical two-pack, making it ideal for multiple or larger jobs. I've used a lot of Overture products, including PETG and PLA, and they always print well. I once printed an 11-foot-long Masamune sword using Overture and it came out looking awesome.

Pros

• Excellent model accuracy
• Excellent diameter accuracy

The Pro series filament from MatterHackers is a much nicer product than a lot of standard PETG. Yes, it costs a little more, but it's designed to help reduce some of the issues that filament suffers from. It reduces shrinkage, so the part you make is as close to the part you designed as possible. This is a great material for those who make 3D-printed models for a living rather than a hobby.

Pros

• Glassy appearance
• Prints with ease

This US-made PETG has an excellent glassy look that is hard to achieve in melted plastic. The aqua color is subtle and gives the appearance of a stained glass window when printed at the high end of its temperature scale.

Printing with it was easy, though the roll is a little big for printers like the Bambu Lab X1, which has an enclosed filament system.

MatterHackers Build Series Materials perfectly balance usability and cost. Yes, I've had failures with the Build Series, but once you get it dialed into your printer, you can make dozens of fun, springy models. 
I like to use it to make fun toys for my kid's preschool -- they can be thrown around without breaking into small, sharp pieces.

There is so much to love about this TPU from Inland. It's colorful, and the rainbow transitions look beautiful. It's flexible and can be used as a phone case. And it's almost translucent, so it has a glassy look. It's great for projects that need to stand out.

Glow-in-the-dark filament normally comes in a standard "radioactive" green, but this beautiful roll transitions through multiple colors. It's simply gorgeous. 

It's also worthwhile to buy some replacement brass nozzles for your printer. Glow-in-the-dark filament can chew them up pretty quickly because the glowing material is more abrasive than standard colors. 

This filament isn't the cheapest, but it is fascinating. This PLA has dense iron powder mixed into it so it is magnetic, and it can rust if you spray it with salt and vinegar. Being able to easily print any model as normal and then rust it allows you to create some brilliant effects.

Testing focuses on a few details: Dimensional accuracy, winding precision, and printing quality. Winding precision is a visual test where I check to make sure the filament works well on the spool, without any crossovers that can cause snags while printing.

Print quality is done using a CNET calibration test that I use to test all of the 3D printers I review. When checking for filament quality, I'm looking for noticeable roughness and missing filament where moisture or other contaminants have interrupted the process of melting and cooling.

To measure the accuracy, I take a 5-meter (16.4-foot) piece of filament from the beginning, middle and end of the roll and measure the diameter at four equally spaced points. I then add up all of those measurements and divide the total by 12 -- the total number of measurements taken -- to give me an average across the roll. Most modern printers use 1.75mm filament, so you want the filament to be as close to that as possible. 

Great filament has a variance of plus or minus 0.02mm, good filament is plus or minus 0.03mm and rough filament is anything plus or minus 0.05mm. All of the filaments we have recommended here are at least 0.03mm on average.

If you're buying a printer for the first time, the best filament is PLA. It is the easiest to print with, the safest in terms of fumes and the most readily available. Think about building up a store of PLA when you first start. A 1-kilogram (2.2-pound) roll feels like a lot, but once you get the itch, materials get eaten up quickly.

Yes. There are two main thicknesses of filament, and if you get them mixed up, your machine won't print. 

1.75mm filament is the most common. It's been adopted by most of the 3D manufacturers in the world, and if you have an entry-level printer, it's likely to run on 1.75mm filament.

Some 3D printers still use the thicker 3mm style, though, so make sure you know which one yours uses before you spend a lot of money on the wrong material.

When 3D printing with any filament, it's important to remember that you're essentially burning plastic. Inhaling that kind of thing is never going to be good, but not all filaments are equally bad.

Of the four main filament types, ABS is easily the most toxic. You shouldn't think about printing it unless you have a well-ventilated space away from your day-to-day living spaces. I have a workshop with a full ventilation system and the fumes can still be pretty bad.

Both PLA and PETG are considered nontoxic, though you still want to keep your area ventilated as you use them. Both filaments are safe to print inside your home, and while the fumes can smell pretty bad, they're not carcinogenic. While other forms of TPU can be toxic, the filament you use for 3D printing is considered nontoxic and nonreactive, so you should be fine printing that as well.

Normally, yes. If your printer isn't calibrated well, it could burn the filament, which would discolor it. But normally, the color accuracy is pretty close. 

A special note on clear plastics: You will not be able to get a completely translucent print with filament. The nature of the printing process makes any clear plastic misty, and infill makes it blurry as well. If you're looking to print glass-like models, you'll need a resin printer.