HT PETG print parameters — temperature, bed, cooling and drying

HT PETG is the high-temperature version with a declared resistance of 125 °C — the second highest in Porima's entire table, right behind PA. The price for that is hardware: 270–300 °C at the nozzle and 100–120 °C on the bed, figures most budget printers simply will not reach.

Before you order, check two things: whether the hotend is rated for continuous operation up to 300 °C, and whether the bed genuinely reaches 110 °C (not sets to 110, but actually reaches it). Ordinary PETG prints 30–40 °C lower and will be the more sensible choice on most printers.

Full HT PETG parameters

Parameter	HT PETG
Nozzle temperature	270–300 °C
Bed temperature	100–120 °C
Recommended nozzle diameter	0.4 mm
Cooling (fan)	0–10%
Drying	6–12 h at 50–60 °C
Enclosure (chamber)	closed or open frame; bed adhesive recommended
Recommended printers	printer with an enclosure
Bambu AMS compatibility	No
Print difficulty level	medium
Print speed	medium
Detail resolution	0.2 mm and above
Abrasiveness (nozzle wear)	none
Warping tendency	medium
Stringing tendency	medium
Layer bonding	good
Support removal	moderately difficult
Temperature resistance	125 °C
Impact resistance	high
Flexibility	high
Moisture resistance	low
Surface finish	glossy
Opacity	translucent
Colour saturation	high
Odour	slight
Post-processing	moderately easy
Chemical solubility	poorly soluble
Spool material	recycled plastic
Recycled content in filament	no
Recyclability	yes
Diameter tolerance	±0.03 mm

Source: the official Porima FDM technical data table (FDM Technical Data). The descriptive ratings (none / low / medium / high) are the manufacturer's own labels, not the result of testing to any standard. Temperature resistance is the manufacturer's own declared figure — it is not HDT, nor any other normed test. The ±0.03 mm diameter tolerance comes from the manufacturer's data, not from the FDM table. See also the print temperature table and the filament drying guide.

How to print HT PETG

Hotend: 270–300 °C is a precondition

At these temperatures a heat break with a PTFE liner starts to break down, so the assembly has to be all-metal. Start at 280 °C. The top of the range increases the risk of scorching and discolouration, especially with slow printing and long dwell times in the melt zone.

A 100–120 °C bed and adhesive — the manufacturer recommends it explicitly

In the enclosure field the table says: closed or open frame, bed adhesive recommended. It is the only material in the whole set with that annotation. The warping tendency is medium, so the first layer decides whether the whole print succeeds: first-layer calibration.

Cooling 0–10%, which is effectively off

The lowest value in the entire table. At this temperature differential a part-cooling fan introduces stresses and leads straight to delamination. If you have to rescue a fine detail or a short bridge, switch cooling on selectively in the slicer, not across the whole model.

Drying 6–12 h at 50–60 °C

Twice as long and 20 °C warmer than ordinary PETG. At 270–300 °C every water molecule flashes off violently — the symptom is hissing at the nozzle and a porous, matt surface. See damp filament and the drying guide.

Bambu AMS: No

The manufacturer marks HT PETG as incompatible with the AMS system and recommends a printer with an enclosure. Feed the filament from an external holder, ideally straight out of a dryer.

What you get in return

125 °C of declared temperature resistance, high impact resistance, good layer bonding and a translucent, glossy finish. The manufacturer rates the print difficulty level as medium — this is not a material that is hard to tune, just hardware-demanding.

The most common problems with HT PETG

• First layer will not stick — the only material in the table for which the manufacturer explicitly recommends bed adhesive — without it the first layer is a lottery
• Warping — a medium tendency with a 100–120 °C bed; the temperature difference between the bottom and the top of the print is the largest of all the PETG materials here
• Scorching and discolouration — 270–300 °C is the range in which polymer sitting in the nozzle changes colour within a quarter of an hour
• Layer delamination — cooling of 0–10% is no accident; every extra percent of fan weakens the bond
• Damp filament — drying 6–12 h at 50–60 °C, twice as long as for ordinary PETG
• Clogged nozzle — working at the limit of the hotend, polymer residue in the heat break carbonises and blocks the flow

Filament from this page: HT PETG Porima 1 kg. Categories: PETG filaments and technical filaments.