PETG
Glycol-modified PET. Claimed to be like ABS but as easy to print as PLA
Notes:
- ~80C print bed seems to be sufficient, but can stick to as cool as 60C on clean glass.
- PETG likes to stick to the print nozzle, so "lay" the initial layer instead of mashing it.
- PETG on-glass can stick exceedingly well, and can 'bite' flakes of glass off if the glass is cooled too quickly on prints that cover a large surface area of the bed.
Some hints on printing PETG
Wikipedia: