PETG (also called copolyester) is a modified version of PET. The modification is achieved by adding a second glycol during polymerization. The molecular structure is irregular; the resin is clear and amorphous with a glass transition temperature of 88 C (190 F).

What are the benefits?

• PETG filament has the reputation of combining the benefits of ABS (stronger, temperature resistant, more durable) and PLA (easy to print) in one material.
• The layer adhesion is usually excellent.
• You can expect less trouble with warping or shrinking of your prints.
• It’s more durable
• Also, you can have the material, prints and misprints recycled. This doesn’t mean you should start printing irresponsibly – sustainably speaking, it’s still plastic, which has to be recycled properly.

Specifications

• Diameter: 1.75 mm. 
• Weight: 1 kg.
• Large: 325 m.
• High quality resealable vacuum packaging. 

What‘s the best temperature and speed for 3D printing?

Most manufacturers recommend a temperature of 220 to 250 C for the hotend. 230 to 240 C is a good place to start your first prints.

Take a good look at the first layers: If the material isn’t extruded somewhat sluggish, you want to raise the temperature a bit. Also, you should start with a low speed of just 15mm/s and work from there to find what works best with your material.

Blue painter’s tape, with or without heat, is the best surface for printing PETG. The finish on the bottom is fairly smooth, but not glass-like.