PETG (PolyEthylene Terephthalate plus Glycol) is a co-polyester used in 3D printing for its durability, impact resistance, and temperature resistance. PETG is the second most popular 3D printing filament behind the ubiquitous PLA. It has qualities comparable to ABS but can be printed without an enclosure or fume handling requirements. Unlike ABS, however, PETG cannot be vapor smoothed using acetone.
Coex 3D Matte Black PETG is made with Virgin resin, high-quality colorant, and an organic matte additive only, with no fillers. All of Coex's filament is made in our production facility located in Wisconsin, USA. Coex 3D uses industrial-grade extruders and laser measuring quality control to ensure quality, consistency, and a 1.75±0.03mm diameter specification with every spool. We provide filament that gives excellent-looking and strong prints.
Recommended Print Settings
Coex 3D recommends the following settings when printing with our PETG. Settings will vary depending on your specific print setup.
Cooling Fan: Recommended. PETG works best with slightly less cooling than PLA. 50-75% fan speed is recommended.
IMPORTANT NOTE! PETG can fuse to glass and PEI print surfaces, causing damage to the print bed when the part is removed. For that reason, Coex 3D recommends always using an additional adhesion agent (such as glue stick or Magigoo) which will help the finished part to release from the print bed.
Other Printing Tips
PETG is slightly more hygroscopic than PLA, so drying your filament can be necessary if it is exposed to humidity. Coex 3D recommends drying our PETG at 65 °C for at least 3 hours. You can tell when your filament needs drying if you experience under-extrusion/inconsistent extrusion, and/or excess stringing. Hearing a "popping" sound during a print is another sign of filament that needs to be dried.
PETG can often result in more stringing than would be expected with PLA or similar filaments. There are a few steps you can take to reduce stringing:
Reduce print temperature. Keep in mind that reducing print temperature will slightly decrease layer adhesion and part strength, but can help reduce stringing.
Increase retraction. Increasing retraction length can help reduce stringing, especially on Bowden-style extrusion configurations.
Enable "Wipe while Retracting" in your slicer. Most slicers allow for this option, which will start a travel move just before/during the filament retraction. This helps "wipe off" the nozzle as a travel move starts, reducing stringing.
Enable "Combing Mode" (Cura) or "Avoid Crossing Perimeters" (PrusaSlicer/SuperSlicer/etc.). Rather than travel moves always going in a straight line, this will cause them to choose a path that avoids crossing over perimeters, effectively keeping the nozzle "inside" the print area wherever possible. This eliminates stringing right at the source but still cannot eliminate it all (such as between multiple parts).
Unfortunately in many cases stringing is impossible to fully eliminate, so some post-processing of prints is often necessary.
Tolerance: At Coex 3D, we use multi axis laser measuring heads to ensure a tolerance of ±.03mm.
Quality: All Coex 3D printer filament is manufactured in our Green Bay, WI production facility. This allows us to ensure consistent quality for every spool through control of every aspect of the manufacturing process.
Packaging: Every spool of Coex 3D filament is thoroughly dried in our industrial dryer before being sealed. Spools are sealed with desiccant in a 4mil thick vacuum bag.
Tested: Coex 3D doesn't just sell filament, we use it on a daily basis. Our 50+ 3D printers are constantly running with our filament. We rely on our quality as much as our customers do.
Never used this brand before. So when I came across it figured what the hell why not give it a try. Bought 3 different rolls of the mystery. The downloaded there settings in Bambu studios. Picked something to print and let it do it's thing. And as you can see the below the print came out fabulous thanks to the filament and the creator of the item printed.
Definitely a very very good purchase. Will be buying more.
I am new to 3D printing and quickly used up the small starter roll supplied with my machine. The sild sample pack provided me several colors to experiment with and a good quantity of material to print with. I feel it was a good value and I have been getting great results with the silk and got the settings dialed in quickly. I have been printing Hot Wheels garages I designed for the grandkids, blue for the boys and pink for the girls and some generic black. Lots of fun!