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24 votes
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Which is more durable to sunlight/weather - PLA, ABS or PETG

Ok, I tried all 3 materials. PLA failed after less then one day, I believe it deformed from the constant pressure and fell out (I didn't find the part but I didn't really search for it, there's some ...
Nir's user avatar
  • 2,461
22 votes
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Which are the food-safe materials and how do I recognize them?

Food safety is a property of both the process and the material. You can't stick food-safe material in a printer that has previously been used to print something food-dangerous and expect the result to ...
Tom van der Zanden's user avatar
18 votes
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Is PLA filament conductive?

Normal PLA is non-conductive. You can take an $\Omega$-meter to a test part if you're really concerned somehow you have some PLA that is conductive. There is a caveat that your color may include metal ...
Barron B.'s user avatar
  • 196
13 votes

Would 3d-printed objects outgas in vacuum?

I found much the same question at Does PLA outgas? An answer there pointed to a NASA outgassing database, Outgassing Data for Selecting Spacecraft Materials, and says that: ABS (unknown supplier), ...
TextGeek's user avatar
  • 3,201
13 votes

Advantages of PETG filament?

I have never used ABS, because I have a young child at home and no ventilation system (just to be safe). I have however used PETG, a crystal clear brand competitively priced on AMA-ssive online ...
Pete's user avatar
  • 421
13 votes

Is PLA filament conductive?

PLA itself falls in the category of non-conductors, with a resistivity ($\rho=R\frac A l=\frac 1 \sigma$) in the order of $10^{16}\ \Omega \text m$ (see here), similar to other plastics. Following ...
pasaba por aqui's user avatar
13 votes

Which is more durable to sunlight/weather - PLA, ABS or PETG

PLA would be a non-starter for outdoor use as it's biodegradable and can breakdown in sunlight. Albeit slowly, but won't be useful for long term project. ABS would be a good choice for longevity, as ...
Diesel's user avatar
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12 votes
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Advantages of PETG filament?

PETG is great stuff to work with. It is stronger than ABS also. It prints slower than ABS and PLA. The formulas vary quite a bit from vendor to vendor. I have used 3 brands, and each of their ...
Asa D DeBuck's user avatar
12 votes

Would 3d-printed objects outgas in vacuum?

Almost all of the FDM materials outgas even at normal atmospheric pressure, and, in fact, most plastics outgas. Further, FDM and many other printing processes do not guarantee no internal voids - ...
Adam Davis's user avatar
  • 1,843
11 votes
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Reducing amount of material

Updated to match the improved question format. There are a few ways to reduce material usage. First is what you have touched on. Which is to reduce the design by punching out holes, and removing all ...
StarWind0's user avatar
  • 3,043
10 votes

3D printing for outdoor use: "What types of filament are most weather resistant?"

PET(G) is a strong contender. It is very strong and water-resistant, and as such is often used to make pop bottles. PLA has a reputation for being "biodegradable" and therefore it is often ...
Tom van der Zanden's user avatar
9 votes

Which are the food-safe materials and how do I recognize them?

Food Contact Substances There are regulatory agencies in most developed countries that regulate food containers. In the USA, the Food and Drug Administration (FDA) regulates Food Contact Substances (...
Adam Davis's user avatar
  • 1,843
9 votes

Which are the food-safe materials and how do I recognize them?

There are 3 things that might affect food safety of 3D printed objects: The filament - it's food safe only if it says so on the package (even if the plastic is not toxic you don't know about the ...
Nir's user avatar
  • 2,461
9 votes

Which is more durable to sunlight/weather - PLA, ABS or PETG

I might be late to the party, but I have a suggestion. Why not use ASA filament, it's the kind of plastic used in car cup holders, lawn rakes and sprinkler heads, it is both heat and cold resistant, ...
James Hanvey's user avatar
7 votes

Advantages of PETG filament?

In addition to what @AsaDeDeBuck said, PETG is also more flexible than PLA, and less stinky than ABS. Furthermore, some PETG variants like to accumulate on the nozzle (particulate build up) and then ...
Mark Walker's user avatar
7 votes

Advantages of PETG filament?

PETG is great, but definitely not as easy to print as PLA. However the advantages of higher impact resistance, temperature resistance and longevity make it superior to PLA for parts that require those ...
hilo90mhz's user avatar
  • 111
7 votes

Is PLA filament conductive?

PLA is non-conductive at room temperature, but when you heat it up over 70 C it is no longer as great an electrical insulator as the part will begin to fail. These temperatures could occur in ...
Dave Pena's user avatar
7 votes

Should I be worried about the lead in brass nozzles?

No. Leaded brass is around 2 % lead and the wear is negligible. How much has your nozzle worn? If your nozzle has worn from 0.4 mm to 0.5 mm over that year, there's maybe $$ ((.5 mm/2)^2-(0.4 mm/2)^2)...
Dave X's user avatar
  • 171
7 votes
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Are 3D prints safe to touch right after printing?

FFF/FDM: Yes FDM/FFF runs by melting a filament and letting it cool again. As soon as the printed parts are cooled down to below 50°C (which is rather quick) handling them is safe. There's no chemical ...
Trish's user avatar
  • 20.7k
6 votes
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Are there any metals that exhibit a large glass state?

A few things are required for effective extrusion-style 3d printing materials: It must stay where placed by the nozzle long enough to harden (or, alternately for pastes and such, have a shear-...
Ryan Carlyle's user avatar
  • 6,516
6 votes

3D printing a boat hull

You will really need to specify your constraints better because the short answer is yes, what you describe is entirely possible, but without knowing whether you are limited to a particular budget, ...
Hari's user avatar
  • 183
5 votes

Would 3d-printed objects outgas in vacuum?

This naturally depends on the ultimate pressure you require. I have made a few tests with LEGO pieces (ABS) in vacuum and reached 10-5 mbar without problems. I did not try to go any lower. Otherwise, ...
Kyamon's user avatar
  • 51
5 votes

Are there any metals that exhibit a large glass state?

I think the closest you're going to get is with a composite material. Over the last 2 years or so, there have been more and more composite filaments emerging on the market for consumer 3D printers. I ...
tbm0115's user avatar
  • 6,274
5 votes

Are there any metals that exhibit a large glass state?

I"m no expert on this, but the article at https://en.wikipedia.org/wiki/Amorphous_metal may be relevant for you. There are some special alloys, such as gold/silicon and various titanium-based ones, ...
TextGeek's user avatar
  • 3,201
5 votes

Reducing amount of material

"Just like the movies"-type tech typically means $$$. For those who do not own (legally or otherwise) expensive CAD software, it may be difficult to find an out-of-the-box solution. That's not to ...
tbm0115's user avatar
  • 6,274
5 votes
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3D printing a cardboard box

The closest thing you will find is Woodfill plastic. As time goes on we are seeing more and more PLA that is infused with other materials. Woodfill will look and feel like waxy wood. We are pretty ...
StarWind0's user avatar
  • 3,043
5 votes

How to print TPU material with 3D printer

Elastomers do much better on direct-drive heads (pulled to the head by the motor) than on Bowden designs (where the material is pushed to the head by a motor). This is because the flexible TPU or TPE ...
Davo's user avatar
  • 2,392
5 votes
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What filaments allow air to pass but not water vapor?

It is difficult enough to make 3D-printed objects water-tight (unless you paint them). Making them permeable to air but not water vapour is too big an ask, I think.
Mick's user avatar
  • 3,072
4 votes

Are there any metals that exhibit a large glass state?

I spent some time looking at making an FDM machine that would print bronze filament. An alloy commonly made into wire had a difference between the solidus and liquidus temperature of only 50 degrees ...
cmm's user avatar
  • 4,446
4 votes

Bonding PETG to glass

The solvents that can dissolve PET are pretty nasty -- I wouldn't personally handle any of them outside a lab fume hood. If you have that, a 50/50 mix of MEK and methylene chloride should work. (...
Ryan Carlyle's user avatar
  • 6,516

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