The 3D printers at HCC Libraries are Ultimaker 3 models. They take 2.85 mm filament in a variety of materials. Ultimaker 3 printers can print two-color models or use the second nozzle to print a dissolvable support material (PVA) for complicated prints. (We do not recommend using PVA for class assignments, as the quality of the print can be inconsistent and the support material is expensive.)
The most common material is polylactic acid, or PLA. It's easy to find online and in stores like Micro Center. It's one of the more affordable filaments and is great for rapid prototyping, though it can be brittle and isn't very heat-resistant. Those new to 3D printing should choose plain filament for their first few projects, rather than silk or glitter filament, which is a little more fragile.
Another common material is polyethylene terephthalate glycol, or PETG. PETG is stronger and more water-resistant than PLA, so it's good for prints that will be used in or near water.
Some reputable producers of 2.85 PLA filament are PolyMaker, GizmoDorks, Matter Hackers, Inland, Atomic Filament, and Ultimaker.
The most important thing to keep in mind with filament is that it absorbs water very quickly. If you buy your own filament, you'll notice it comes in a vacuum-packed bag with a packet of desiccant. That's because keeping filament dry is important. Generally, you can keep your opened filament in temperatures that are comfortable for people, but you want the humidity to be as low as possible. PLA is a little more forgiving than PETG and PVA when it comes to humidity.
See below for a video showing a common filament storage strategy using a weatherproof box and a rechargeable dehumidifier.
If you're ready to take a deep dive into all things filament, check out these hand-selected videos!
This is a basic storage technique that involves a weatherproof/ waterproof plastic storage box (with a gasket) and a small rechargeable dehumidifier (such as Eva Dry 333 or Eva Dry 500.) You can also use color-changing desiccant beads in breathable bags. When the desiccant changes color to show that it can't absorb any more moisture, you can either plug in the rechargeable dehumidifier until it dries or you can put the bag with desiccant beads in a dehydrator or microwave. I also like to keep a humidity sensor (hygrometer) in the box to keep an eye on the humidity.
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